PROJECT DELIVERABLE REPORT Project Title: Innovative ......EE-13-2015 Technology for district heating and cooling InDeal - 696174 InDeal / D1.5 Document Information Filename(s) InDeal_D1.5_

“This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 696174”

PROJECT DELIVERABLE REPORT

Project Title:

Innovative Technology for District Heating and Cooling EE-13-2015 -Technology for district heating and cooling

Deliverable number D1.5

Deliverable title Test sites for Real Case Studies

Submission month of deliverable M6

Issuing partner SNCU

Contributing partners ENERGETIKA

Dissemination Level (PU/PP/RE/CO): PU

Project coordinator Prof Karcanias, CITY

Tel: +44 (0) 20 7040 8125

Fax: +44 (0) 20 7040 8568

Email: [email protected]

Project web site address www.indeal-project.eu

Ref. Ares(2018)5230050 - 11/10/2018

EE-13-2015 Technology for district heating and cooling InDeal - 696174

InDeal / D1.5

Document Information

Filename(s) InDeal_D1.5_ Test sites for Real Case Studies _revision v3.2

Owner InDeal Consortium

Distribution/Access InDeal Consortium, PO, Public

Quality check CITY

Report Status Ongoing

Revision History

Version Date Responsible Description/Remarks/Reason for changes

1.0 21-11-2016 SP (FEDENE/SNCU) Report write-up

1.1 10-12-2016 ENERGETIKA Inclusion of partners contributions

1.2 23-12-2016 PROMAR Internal Review

2.0 11-01-2016 CITY Review and Release

3.0 30-04-2018 CITY New structure decided based on the review

comments

3.1 30-06-2018 All Integration of inputs provided by all the partners

3.2 30-09-2018 CITY & All Finalization of the revised document


InDeal / D1.5

Contents

1 Summary................................................................................................................................................................. 5

2 Real Case Study A: Vransko municipality district heating system (Slovenia) .............................................. 6

2.1 General Description .................................................................................................................................... 6

2.2 Heat Grid ...................................................................................................................................................... 8

2.2.1 Insulation ...................................................................................................................................................... 8

2.2.2 Pipe Grid .................................................................................................................................................. 9

2.3 Substations .................................................................................................................................................... 9

2.3.1 List of substations ............................................................................................................................................ 9

2.3.2 Valves ...................................................................................................................................................... 10

Regulation of the valve ............................................................................................................................................. 10

2.3.3 Heat exchanger ...................................................................................................................................... 10

2.4 Heat Central station specifications ......................................................................................................... 10

2.4.1 Valve........................................................................................................................................................ 10

2.4.2 Hot water production ........................................................................................................................... 10

2.4.3 Exchanger storage capacity ................................................................................................................. 11

2.4.4 Pump ....................................................................................................................................................... 11

2.4.5 Insulation ................................................................................................................................................ 11

2.4.6 Hot Water grid....................................................................................................................................... 11

2.5 Monitoring Position .................................................................................................................................. 11

2.6 Current state and needs for improvement ............................................................................................. 12

3 Real Case Study B: Odysseum Hippocrate district heating and cooling system in Montpellier (France)

19

3.1 General description ................................................................................................................................... 19

3.2 Heat Grid .................................................................................................................................................... 22

3.2.1 Insulation ................................................................................................................................................ 22

3.2.2 Pipe Grid ................................................................................................................................................ 24

3.3 Substation.................................................................................................................................................... 26

3.3.1 List of substations ................................................................................................................................. 26

3.3.2 Valve........................................................................................................................................................ 27

3.3.3 Regulation of the valve ......................................................................................................................... 27

3.3.4 Heat exchanger ...................................................................................................................................... 28


InDeal / D1.5

3.4 Heat Central................................................................................................................................................ 28

3.4.1 Valve........................................................................................................................................................ 28

3.4.2 Iced Water production: ........................................................................................................................ 28

3.4.3 Cold water production ......................................................................................................................... 28

3.4.4 Hot water ................................................................................................................................................ 29

3.5 Exchanger ................................................................................................................................................... 30

3.6 Pump............................................................................................................................................................ 30

3.7 Insulation .................................................................................................................................................... 31

3.7.1 Hot Water grid....................................................................................................................................... 32

3.7.2 Cold water grid ...................................................................................................................................... 32

3.8 Monitoring Position .................................................................................................................................. 32

3.9 Current state and needs for improvement ............................................................................................. 34

4 Installation plan ................................................................................................................................................... 38

5 Annex.................................................................................................................................................................... 40

A. Vransko DH layout ........................................................................................................................................ 40

B. Montepellier DH layout ................................................................................................................................ 41

Abbreviations

DH District Heating

DHCS District Heating Cooling System

BDH Biomass District Heating

1 Summary

The aim of the task 1.5 is to provide the specifications of the two selected InDeal real case studies for

district heating and district heating and cooling systems:

• Real Case Study A: The test site in the Vransko municipality has been selected by ENERGETIKA

in order to perform test assessment in operational environment of the sub-systems and the InDeal system

for district heating system.

• Real Case Study B: The SNCU investigated to find another representative case study in France

among its members. The test site of Odysseum in Montpellier has been chosen by the SNCU, in order to

carry out additional studies and tests in other operational environments for district heating and cooling

systems. This site has been selected for his networks in both heating and cooling energies, and the possibility

to get a complete real study thanks to a relative small quantity of substations.

Within this report, these 2 selected test sites are described regarding:

• Types of energy sources

• Cooling and heating plant

• Types of buildings in the system

• Number of storages, stations and substations

• Level of energy efficiency of buildings and of the system as a whole

• State and condition of the DHCS

• Needs for imminent improvement

• Installation plans

.

2 Real Case Study A: Vransko municipality district heating system (Slovenia)

2.1 General Description

Energetika Projekt d.o.o. operates with a biomass district heating in municipality Vransko from 2003.

Vransko is a small municipality in Slovenia with 2’526 inhabitants, covering an area of 5’297 hectares.

Largest natural wealth of this municipality are forests with a coverage of 77% of it area, which are mainly

privately owned. 60% of the homes are heated with wood as the sole or main source of energy. This

confirms that the wood is the traditional source of energy for heating of residential areas and domestic hot

water preparation. Due to this configuration, a biomass district heating project has been designed in order

to fulfill the needs of all the Vransko’s inhabitants. Nowadays, the power available for the connected users

is 4.8MW, providing the heating and the hot domestic water throughout the whole year (8760 hours/year).

3 Boilers are used to feed this DHS are:

• 1 biomass boiler burning wood chips with a power per unit of 2MW

• 1 biomass boiler burning wood chips with a power per unit of 1.2MW

• 1 oil fuel standby boiler with a power per unit of 1.5MW

This DH can run entirely on wood chips (the oil fueled boiler is only used as a reserve).

6’450 loose cubic meter of wood chips are yearly used in average, which are supplied by surrounding

farmers. Due to the use of different wood chip suppliers, both G50 and G30 types are used, with 25-35%

of moisture content.

Both biomass boilers were produced in Slovenia by a company KIV d.d., a local manufacturer ensuring

high efficiency by using biomass. The biggest boiler, type KIV BHH 2000, has an estimated fuel use of

4m3/h, while the smaller one, type KIV MODUL R/H 2000, uses an estimated 2.4m3/h biomass fuel. Both

boilers are designed for burning biomass with relatively high humidity. The entire burning process is

computerized. The wood chips are stored in a large warehouse of 830m3; and in the second – small

warehouse, so called daily storage, which capacity is 370m3.

1 small CHP plant is also used with a power per unit of 120kW (wood gasification).

The central plant is located on the south of Vransko, within an area of 1’300m2. It consists in a boiler room,

a large warehouse for wood chips, a small warehouse for wood chips with transport system (so called “daily

storage”), a control room, offices and external manipulation space.

Figure 2.1 Photo of the Vransko central plant

The Vransko DH has also a system of flat solar collectors which are integrated into the biomass system. It

consists in 840m2 of solar collectors, incorporating 370Kw to the DH system, helping the biomass boilers

and the preparing of hot domestic water for the whole city. The connection of the solar collectors was

conducted according to the principle of Low-Flow in seven receptive fields. In this way, high efficiency in

solar energy is reached with a temperature drop of about 30K.

To meet the requirements, the solar system needed adequate storage tank. We installed 100m3 storage tank

(3’900 MWh). Storage capacity also assist in economical operation of biomass boilers in the summer and

during winter peak load.

Figure 2.2 Architecture of the Vransko plant

The entire district heating net is 12’100 m long (9’050m of primary and 3’050m of secondary net pipes).

The layout of this network can be found in Annex 1. It consists of preinsulated steel pipes from DN180 to

DN25. Size of supply area is 1.2km2. As needs of hot water for sanitary use was required, the network has

been designed with adapted high supply-return temperatures (95-65°). The supply-return temperatures of

the hot network respect the following rule:

Figure 2.3 Supply-return temperature rule with respect to the outside temperature

Heating water temperature tolerance at each consumption point is +/- 3 ° C.

The connected users to BDH system Vransko are individual houses, multi-flat buildings, industrial building,

all the larger public users (school, kindergarten, sports hall, medical center, municipality building), some

shops, a restaurant, a bank, a cultural center and the post office. At the end, 189 end users are connected

with exchangers according to the following diagram:

Figure 2.4. Substation architecture

Most of the buildings connected to Vransko DHS are quite old (40+ years) with poor thermal insulation,

while newer buildings (<15 years) are mostly well insulated. Buildings achieved after 2006, have to be

connected to a DH according to a municipal ordinance. This kind of building is in a low-energy class (B1,

B2: 15-35 kWh/m2.a).

Consumers have in recent years begun to implement partial energy efficiency of their buildings (additional

thermal insulation, replacement of joinery ...). Currently structure of this kind of buildings is about 5%.

In 2015, Vransko DH has produced 4’318’699kWh of thermal energy, with 319’360kWh from solar

collectors. 3’586’270 kWh has been supplied to the end users (BDH system efficiency is 83.04%).

2.2 Heat Grid

2.2.1 Insulation

The insulation of the pipes is a polyurethane or isocyanate foam, resistant to temperatures up to 130 C. The

protective insulation shell is made of polyethylene pipe.

Figure 2.5. Protective insulation shell

2.2.2 Pipe Grid

The basic pipes are steel welded pipes according to DIN 2458 and DIN 1626, lengths 6 and 12 m. Pipes

are pre-insulated dimensions DN 28/77, DN 25/90, DN 32/110, DN 40/110, DN 50/125, DN 65/140,

DN 80/160 in DN 100/200.

Figure 2.6. Pipes installation

2.3 Substations

2.3.1 Substations

The stations are manufactured by KIV Trade d.o.o .. A compact heat station with a secondary distributor

with the preparation of a DHW with a boiler and an electronic heating controller (controller Trovis 5576).

There are currently 144 subsets installed.

Figure 2.7. Photo from a substation in Vransko

2.3.2 Valves

The valve is manufactured by Samson, PN 10 with a flow rate of 0.3 to 1

m3 / h.

Regulation of the valve

The valve control is carried out with the help of the electric actuator

manufactured by Samson, type 5825-10.

2.3.3 Heat exchanger

The heat exchanger is Alfalaval. The heat exchanger panels are made of

100% stainless steel, which are joined together with fusion technology.

2.4 Heat Central station specifications

2.4.1 Valve

Three-way mixing valve with Danfoss electric drive, flush-mounted version. VFR 3 valve TYPE, AME55

drive. Dimension DN 80, kvs 100m3 / h / NP16

2.4.2 Hot water production

The production of hot water is carried out with three separate boilers:

- Boiler BHH 2000 with equipment (2 MW) - temperature regime 110/90 C, 6 bar

- MODUL R / H 2000 boiler with equipment (1,2 MW) - temperature regime 110/90, 3,5 bar

- Hot water boiler S 1600 with equipment (1.6 MW) - boiler to EL fuel oil with temperature regime 110/90

C, 3.5 bar.

Figure 2.8. Valve used in

Vrasnko substations

Only wood chips of the G60 dimension can be used as fuel. Maximum humidity can be 55%.

2.4.3 Exchanger storage capacity

The heat exchanger has a capacity of 100 m3 of

storage.

2.4.4 Pump

In the boiler room, a pumping station with

circulating pumps is installed (one operates, one is

in reserve) and the associated water circulation

valves. Pumps are frequency controlled.

2.4.5 Insulation

The pipelines in the boiler room are insulated with

mineral wool and coated with Al sheet of minimum

thickness of 0.5 mm. The thickness of the

insulation is as follows:

- DN 25 – DN 50 40 mm

- DN 65 – DN 80… 50 mm

- DN 100 – DN 150 60 mm

- DN 200 80 mm

2.4.6 Hot Water grid

The pipelines are made of steel seam pipes of

dimensions DN 40, DN 50, DN 65, DN 80, DN

100, DN 125, DN 150 and DN 200. -The pipelines

allow for self-complementation of temperature

dilatations.

2.5 Monitoring Position

The control and management of the entire combustion process is carried out from the command booth,

where control cabinets, measuring converters, visualization and control systems are installed. An overview

of the plant is possible from the cabin.

The operating conditions of the firebox are monitored; this is the temperature, the vacuum and the oxygen

content. The oxygen content is used to control the combustion and to convert the emission concentrations

(efficiency) to the reference value.

The control post comprises:

- Electrical wardrobe with built-in control and power elements.

The following parameters are measured or controlled:

- water temperature in the boiler

- return water temperature in the boiler

- minimum water pressure in the boiler

Figure 2.9. Heat exchanger storage capacity

- the maximum pressure of the water in the boiler

- the presence of water in the boiler

- vacuum in the furnace

- overpressure in the furnace

- furnace temperatures

- the flue gas temperature

- water pressure in the boiler - flow

- excess air in flue gases

- dosing shaft

- dosing worm

- water pressure in the boiler - return

2.6 Current state and needs for improvement

Technology and installation of the system is 13 years old. Boilers, heating station and district heating

network are reviewed and serviced regularly. Except for four minor defects (leaks) in heating network, there

was no major problems. Energetika always works in direction to increase boiler efficiency and efficiency of

a whole system. Any improvement is welcomed in order to increase the efficiency, reduce energy

consumption, reduce fuel consumption, or operate boiler or system optimization.

Table 2.1 Technical data for the case study in Vransko (2016)

Table 2.2 Solar power generation and total heat production analysis in Vransko for 2016

JANUARY 2016

SOLAR SYSTEM TOTAL HEAT PRODUCTION (boiler + solar)

TOTAL output (kWh) TOTAL output (kWh) % solar energy

3,490 798,901 0.44

Average

112.58 kWh/day 25,771.00 kWh/day

Sold heat 564,768.00 kWh

System efficiency 70.69%

FEBRUARY 2016



4,780 553,200 0.86

Average

164.83 kWh/day 19,075.86 kWh/day



MARCH 2016



14020 546598 2.56

Average

452.26 kWh/day 17632.19 kWh/day

Sold heat 360555.00 kWh


APRIL 2016



25380 281621 9.01

Average

846.00 kWh/day 9387.37 kWh/day



MAY 2016



41130 290581 14.15

Average

1326.77 kWh/day 9373.58 kWh/day



JUNE 2016



45620 145798 31.29

Average

1520.67 kWh/day 4859.93 kWh/day



JULY 2016



48070 105501 45.56

Average

1550.65 kWh/day 3403.26 kWh/day



AUGUST 2016



69930 151200 0.44

Average

2255.81 kWh/day 4877.42 kWh/day



SEPTEMBER 2016



46590 143299 3251

Average

1553.00 kWh/day 4776.63 kWh/day



OCTOBER 2016



9070 340499 2.66

Average

292.58 kWh/day 10983.84 kWh/day



NOVEMBER 2016



5560 519101 1.07

Average

185.33 kWh/day 17303.37 kWh/day



DECEMBER 2016



3620 782000 0.46

Average

116.77 kWh/day 25225.81 kWh/day



Table 2.3 Solar power generation and total heat production in 2016 Solar system (SUM 2016): 317,260.00 kWh

Total heat production (boiler + solar) (SUM 2016):

4,658,299.00 kWh

Heat production from CHP (SUM 2016):

66,726.00 kWh

Total heat sold (SUM 2016): 2,816,137.00 kWh

Figure 2.10 Energy (kWh) produced and sold per month (2016)

0

100

200

300

400

500

600

700

800

Jan-16 Feb-16 Mar-16 Apr-16 May-16 Jun-16 Jul-16 Aug-16 Sep-16 Oct-16 Nov-16 Dec-16

kW

h

energy produced

energy sold

Figure 2.11 Efficiency (%) of the ENERGETIKA’s DH network per month for 2016

0

10

20

30

40

50

60

70

80


Eff

icie

ncy

(%

)

3 Real Case Study B: Odysseum Hippocrate district heating and cooling system in

Montpellier (France)

Figure 3.1 Odysseum Hippocrate district heating and cooling system in Montpellier

3.1 General description

Montpellier is a city in the South West of France. His district heating and cooling system was created in the

1970s. It is managed by a public-private company, the SERM (Société d'Équipement de la Region

Montpelliéraine).

The complete Montpellier DHCS supplies heating and cooling for the city center, consisting in 800’000m²

of offices, housings, public equipment and commerce.

In 2000, the SERM DHCS has been extended to the East with the Port Marianne district. Then, this

additional Odysseum Hippocrate DHCS is operating in order to fulfill the heating and cooling needs from

the climate and technical requirements for a new building area of 190’000 m², mainly divided into a clinic,

a skating ring, an aquarium, offices, housings and commercial buildings. Thus, some connected user have

specific energy needs profile with a high demand in both cooling and heating on the whole year, and which

cannot respect a specific energy label.

This particular extension of the Montpellier DHCS will be the part making the real case study B of this

H2020 project. It consists in 2’300m of heating and cooling networks, with 9’160 kW of heating power and

11’040 kW of cooling power needs. The layout of this network can be found in Annex 2. Pipes diameters

varies according to the location from DN50 to DN500. 14 substations are connected with exchangers for

both heating and cooling networks according to the following diagram:

Figure 3.2 Substation architecture in DHC of Montpellier

In 2015, the annual global energy consumptions were 6’600 MWh for heating and 11’300 MWh for cooling

(positive cold without the ring skating). In 2017, an important group of buildings will be also connected,

adding another 7 substations with 1’200 kW of power heating and 1'500 kW of power cooling needs.

Figure 3.3 Layout of the DHC network in Montpellier

The energy powers used to feed this DHCS are:

• A thermal cooling power capacity of 11720 kW with :

o 2 Carrier CHP plants with a power per unit of 760kW

o 2 Carrier CHP plants with a power per unit of 600kW

o 3 power plants with a power per unit of 3MW

• A cooling system consisting in:

o 4 closed cooling towers with a power per unit of 3MW

o 4 opened cooling towers with a power per unit of 1’500kW

• A thermal heating power capacity of 13’500kW :

o 3 gas boiler plants with a power per unit of 3MW

o 1 heat exchanger from the Port Marianne biomass plant with a power of 4.5MW :

Figure 3.4 Photo of the central plant in Montpellier

There is no particular thermal energy storage capacity set for this DHCS.

As no need of hot water for sanitary use was required, the hot network has been designed with low supply-

return temperatures (60-40°). This level of temperature was also convenient to implement a process of heat

recovery on the condensation network for the electrical group of the ice water production. The supply-

return temperatures of the hot network respect the fallowing rule:

Figure 3.5 Supply-return temperature rule with respect to the outside temperature

Regarding the cold network, the design temperatures are constants through the year with 7°C as supply

temperature and -13°C as return temperature.

The available energy in the condenser of the groups solicited all year long to produce cold is not sent in the

cooling towers, but recovered by heating up the return of the district heating. So, with this CHP system,

60% of the supplied heat is renewable. The additional heat required in the middle of winter was initially

produced from gas, but is supplied from the Port Marianne biomass plant since 2014, located at 1 km far.

Figure 3.6 Energy production and distribution

Eventually, the respecting small quantity of substations in this DHCS can guarantee an easy and complete

deployment solution to monitor a whole DHCS. Besides, the low temperatures for heating, the under-zero

temperatures for cooling all year long, and the use of a CHP making an interaction in the energy production

between both district networks, shows the Odysseum Hippocrate DHCS as an interesting case for this

H2020 project.

3.2 Heat Grid

3.2.1 Insulation

The pipes of the cold grid are not insulated there is only a polyethylene (HDPE) sleeve in order to protect

mechanically the pipe.

The pipes of the hot grid are insulated with polyurethane foam of the brand INPAL (Polyuretub). The

documentation about these pre isolated pipes are available in the file “PEDH insulation”. The thermal

conductivity of the polyurethane is 0.033W.m-1.K-1. The Polyurethane is protected by a polyethylene

(HDPE) sleeve.

Figure 3.7 PUR and HDPE insulation

The boundaries of temperature are 120°C in continuous operation and 140°C in discontinuous operation.

The thickness of the insulation is summarized in the Excel file called “Pipe” and on the Table n°1. For the

insulation of the grid the company have to respect the following equation:

𝑀𝑎𝑥 ℎ𝑒𝑎𝑡 𝑙𝑜𝑠𝑠 (𝑊. 𝑚−1. 𝐾−1) = 1.5𝑑 + 0.16

With d the diameter of the pipe in meter. This equation corresponds to the range 4. All the hydraulics

pieces larger than DN32 need to be insulated. The insulation is different in the glycoled water grid.

Figure 3.8 Hydraulic pieces insulation

Figure 3.9 Insulation for Glycoled Water

3.2.2 Pipe Grid

The grid studied for the H2020 projects is the Odysseum grid of Montpellier. This grid is composed of

several branch. In order to be readable the grid is divided in section between each valves in order to separate

each pipes of different diameters. The central of Odysseum feeds this activity zone of hot, cold and iced

water. The pipes are in smooth black steel. The thermal conductivity of the black steel is 52.33 W.m-1.K-1.

In the distribution grid and generally about heat production and distribution the temperatures of hot water

have to be higher than 50°C and the cold water under than 20°C to avoid the development of bacteria as

Legionella. On the hot grid, in order to limit the risk of burns the water in the secondary side has to be

lower than 90°C.

LEN

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S (m

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DN

(m

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Din

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(mm

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N (

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Thic

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150

160,

316

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250

263

273

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4,14

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216

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125

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532

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100

107,

111

4,3

3,6

2,7

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9,7

422

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9,7

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125

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9,7

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200

210,

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109,

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9010

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441

457

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3617

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4,7

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4,3

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912

532

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211

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3237

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611

033

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82,5

88,9

3,2

32,4

9010

0,8

108

3,6

180

3617

518

4,7

193,

74,

538

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24,3

6

100

107,

111

4,3

3,6

200

42,8

520

021

0,1

219,

14,

558

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200

210,

121

9,1

4,5

315

47,9

540

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2,2

406,

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116

2,95

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912

532

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92,

68

125

131,

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9,7

422

542

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150

160,

316

8,3

431

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150

160,

316

8,3

425

040

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200

210,

121

9,1

4,5

125

131,

713

9,7

422

542

,65

150

160,

316

8,3

488

,34

200

210,

121

9,1

4,5

315

47,9

540

039

2,2

406,

47,

114

4,61

200

210,

121

9,1

4,5

315

47,9

535

034

335

5,6

6,3

13,1

7

125

131,

713

9,7

422

542

,65

250

263

273

521

1,45

100

107,

111

4,3

3,6

200

42,8

515

016

0,3

168,

34

52,0

7

125

131,

713

9,7

422

542

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150

160,

316

8,3

411

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100

107,

111

4,3

3,6

200

42,8

515

016

0,3

168,

34

93,1

8

PIP

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2 H

OT

INSU

LATI

ON

PIP

E

2 C

OLD

Tab

le 3

.1: P

ipe

Gri

d In

form

atio

n

3.3 Substation

The grid allows the company to feed several buildings which are represented by substation. These substations

are the boundaries of the grid. It means the company takes care of the hydraulic components before the

exchanger. The exchanger is at the expense of the consumers as the maintenance on this secondary side. All

the pump registered are on the secondary side it means on the consumer grid. The energetic counters are

registered in the summary file too.

Each substation signs a contract with the company and commands an amount of heat. Then the grid is

model in order to deliver this quantity of heat if the regulation valve is 100% opened. The value of maximal

flowrate for hot and cold water are available in the following table. The minimal flowrate is calculated with

a 5% coefficient. This value is set to keep the sensors submerged. The flowrate is determined with a variation

of temperature of each season given in the Table 3.2.

Table 3.2: Maximal and Minimal flowrate in each Substation

All the substations have to respect these values to model the exchanger:

Table 3.3: SERM Consigns about Heat Exchanger

There is the values of temperature for the inlet and outlet of the primary and secondary side in function of

the season.A regulation valve in each substation controls the flowrate to respect the maximal set value of

40°C for the hot primary return and the minimal one of 13°C for the cold grid.

3.3.1 List of substations

The grid feeds 14 substations:

➢ Aquarium

➢ Capdeville

➢ Centre Commercial

➢ Géant Casino

➢ Clinique Millénaire

➢ Consultation

➢ Gallilé (Bat B)

➢ Elios (BatC)

Maximal Flowrate (Kg/s) Minimal Flowrate (kg/s) Maximal Flowrate (Kg/s) Minimal Flowrate (kg/s)

Aquarium 10,05 0,25 57,19 1,91

Capdeville 21,53 0,54 50,64 1,69

Centre Commercial 68,62 1,72 206,06 6,87

ILOT H1 consultations médicales 7,32 0,18 20,49 0,68

Clinique Millénaire 28,71 0,72 83,40 2,78

Farhenheit 1,79 0,04 11,32 0,38

Gallilé Bat B 9,86 0,25 23,23 0,77

Géant 11,96 0,30 35,74 1,19

Hélios Bat C 17,70 0,44 44,68 1,49

Holiday Inn 5,26 0,13 8,94 0,30

Mac Do 1,75 0,04 7,21 0,24

Melies Bat A 17,35 0,43 40,75 1,36

Patinoire 14,35 0,36 19,06 0,64

Planétarium 2,87 0,07 7,15 0,24

SubstationHot Cold

Inlet Outlet Inlet Outlet

Hot Winter 60 40 58 ≤38

Hot Summer 50 40 48 ≤38

Cold Winter 9 13 10 ≥14

Cold Summer 7 13 8 ≥14

Primary SecondaryExchanger Pinch

1

2

➢ Fahrenheit

➢ Holiday in

➢ Melies (BatA)

➢ Mc Donalds

➢ Patinoire

➢ Planetarium

In some substation all the information are not available in deed some pieces are insulated. Moreover the

secondary side is managed by the consumer so pieces are not always obtainable. For example pumps of the

“Géant Casino” are in inaccessible room. About the “Mc Donalds” substation there is no exchanger and

pumps. The consumer is directly link to the grid. There is no cold water consumed in the “Patinoire”

substation. The temperature in the substation is generally near to the ambient temperature. There is some

fluctuation in function of the weather and of the substation but it is not relevant.

3.3.2 Valve

In order to avoid a too large amount of information, only the motorized and significant valves are listed in

excel file called “Material_List_Substation”.

3.3.3 Regulation of the valve

Each substation is equipped with a regulation valve (type TA FUSION, TA KTM 512 or DA 516) which is

controlled with a PID system. The valve is closed by a motor (0-10V) in function of the outlet temperature

of the substation’s exchanger. The opening of the valve has a minimal boundary, indeed it depends of the

diameter of the pipe however the temperature controller have to be submerged.

Figure 3.10: Valve regulation in Substation

When the outlet temperature of the exchanger is lower than the set value the motor is opening the valve. It

increases the grid flowrate and so the outlet temperature. The variation of the flowrate is regulate by the

pump of the central which are govern with cascade system.

28 InDeal / D1.5

3.3.4 Heat exchanger

As explained previously the heat exchanger of substations are chosen and bought by the consumer. It means

the SERM have only a supervisory role on these aspect. The information about Heat exchanger are available

in the Excle file “Material_List_Substation”. For some substations there is no information. In this case you

can refer you to the clause imposed by the company. It is written than the exchanger could not have higher

pressure loss than 2 mCE and it has to be a plate exchanger.

3.4 Heat Central

The Odysseum central produces the cold and glycoled water to feed all the activity zone. The piston cold

groups are available in complement but are not used generally. The hot water is produce in the Combine

Heat and Power central from Port Marianne and transfer to the Odysseum grid thanks to an exchanger on

the central. The boiler on site are used in complement when a set value of outlet temperature of the heat

exchanger is not reached. Moreover there is a heat recovery system on the smoke of the furnace.

3.4.1 Valve

Brand Eurovalve DANFOSS VALPES SIEMENS TA

Type Flanged and

motorized

Bypass

Reference 94 SYI AY VS 300-90A

G00

VVF43.125/SKC62F STAF

Table 3.4: Valve information in the Heat production Central

3.4.2 Iced Water production:

The water used to produce freezing water is composed by a high percentage of Glycol. It permits to reach

a temperature between -9 and -12°C. The properties of the mix Glycol-Water could be found on the

following website: http://www.celsius-process.com/outils.php

Bypass valve for cooling tower: This bypass valve is between the cooling towers and the condensers of the

Glycolic water. It permits to control the inlet temperature of the condenser. When the set value of inlet

condenser temperature is reached the valve lead up the water to the cooling towers.

There is Proportional Integrative (PI) regulation of the inlet temperature in function of the ambient

temperature:

Table 3.5: Temperature threshold for Condenser regulation

3.4.3 Cold water production

The temperature of the cold water needs to be between 6 and 12 °C.

Regulation valve for condensor: All the cold production group have 4 valves on the condenser circuit:

• Two valves towards the cooling tower called VT (same position)

• Two valves towards the heat recovery called VR (same position)

Tamb (°C) Tcond (°C)

15 25

25 29

29 InDeal / D1.5

Figure 3.11: Control Screen of the Cold groups

These valves are controlled by the following way:

• If the group is not operating or recovering heat: VT is 100% opened and VR is closed.

• If the group is recovering heat: VR will be regulated in order to recover enough energy to reach the

set value of the inlet bottle temperature (52°C).

The VT allows us to feed the tower with the remaining portion of the water.

The regulation of these 2 valves is a Split range regulation.

• If the exchanger pumps (tower side) are stopped, VR is 100% opened and VT is closed.

Note: This regulation system is operating for the 2 screws groups (GF3, 6). However the pistons groups

(GF4,5) are too old to recover heat from the boiler.

The regulation valve EV9 have the same aim than the previous one but for the centrifugal groups. It permits to

bypass the cooling tower if the inlet temperature of the group (TC5) is lower than 21°C. The control system of

this valve is a PID regulation which is set from the supervision office.

Note: This valve impacts only the positive cold centrifuge group.

3.4.4 Hot water

The heat of this grid is produced in the Port Marianne Tri generation site. The heat is driven until the

Odysseum central where the exchanger SONDEX allows us to recover it. There is a regulation on the valve

before the exchanger in order to control the temperature of the water heated. When the set value given by

the supervisory console is not reached the opening of the valve increases and conversely for the opposite

situation.

Then there is a heat recovery on the condensers of the cold groups with two bypass valve which allows us

to choose if the water of the condensers grid is used in the hot grid or send to the cooling tower.

If the set value could not be reached with this heat transfer the natural gas boilers permit to cover the lack

of heat.

VT

VR

30 InDeal / D1.5

3.5 Exchanger

There is two heat exchanger on the Odysseum central. The first one is used to recover the heat from the

other central which produces the heat from biomass combustion. Generally the heat allocates to the

substations of Odysseum comes from this combine heat, cold and power station. It means the boilers of

Odysseum central are only complements. The other exchanger is use to refresh the condenser circuit of the

fresh groups. This heat exchanger transfers the heat to the cooling tower grid.

Exchanger of the cold group’s condenser grid:

Table 3.6: Exchanger on heat recovery from condensers

Exchanger of the heat grid:

Table 3.7: Exchanger between Odysseum and Port Marianne Grids

3.6 Pump

The pumps of the heat central are of the brand SALMSON and centrifugal type. The Pumps are called P1

to P14 and the function of each pump is available in the following table:

Heat Exchanger Type Plate (PHE)

Brand CETETHERM

Reference V 130-268 N° EP-3063

Heat Exchanger Type Plate (PHE)

Brand SONDEX

Reference S62-IS06-269-TKTM95

Puissance (kW) 5000

Surface (m²) 181,26

Fouling Factor Clean (W/m/K) 5540

Fouling Factor Dirty (W/m/K) 6205

Liquid Volume (L) 526

Temperature (°C) Hot Cold

Min 62 60

Max 90 80

31 InDeal / D1.5

Table 3 9: Minimal insulation on cylindrical pipes

Table 3.8: Information about Central Pumps

The grid pumps are regulated with a Cascade management. It means there is several parameter which are

setting in order to launch a pump in function of the return temperature. But the exploiting employee is able

to manage the functioning of the pumps himself.

3.7 Insulation

The minimal thickness for a pipe insulation is:

Function Number Reference Flowrate (m3/h)

P1 Boiler charging set 3 PSC 112/4 + QSFA 100L4-90N/SIL 410.16/2.2 130

P2 Hot water grid 4 SIL415-19/5.5 (NO 100-400-H31-22-4/GMS) 97,5

P3 Heat recovery on smoke 2 JRL 208/13 /SIL 415/19 52

P5 Evaporator glycoled water 5 PSC 112/5.5 85

P6 Condensor glycoled water 5 PSC 132 / 7.5 61

P7 Glycoled water grid 3 LRC 415-B-25/15 150

P8 Evaporator Positive cold Ph1-4 4 PSC 112/4 119

P9 Condensor Positive cold Ph2-4 2 PSC 160/11 130

P9' Condensor Positive cold Ph2-4 2 NO 150-400V-H31-75-4 150

P10 Heat exchanger equilibrium 1 SIL415-19/5.5 215

P11 Heat exchanger rejection 3 JRL208 - 13/3 280

P12 Evaporator positive cold Ph5 2 NO150-315V-M31-55-4GMS 460

P13 Condensor Positive cold Ph5 2 NO150-400V-H31-75-4/GMS 536

P14 Cold Water Grid 3 NO150-315V-H31-45-4/GMS 360

P14' Cold Water Grid 3 NO150-315V-H31-55-4/GMS 457

32 InDeal / D1.5

3.7.1 Hot Water grid

The insulation on the hot water grid is Armaflex one from the brand Armacell. The thermal conductivity of

the Armaflex is 0.036W/m-1.K-1

Um -50 -40 -20 0 +10 +20 +40 ºC

λ≤ 0.031 0.032 0.034 0.036 0.037 0.038 0.040 W/m-1.K-1

Table 3.10: Thermal conductivity of insulation on the hot grid

3.7.2 Cold water grid

The insulation on the cold water grid is Styrofoam from the brand Ouest isol.

Table 3.11: Information on the cold grid insulation

3.8 Monitoring Position

The supervisory post is on site. It is a local with a monitoring computer which have a simulation interface.

There is an employee of the exploiting company on site all the day. The interface allows him to deal with

the installation and to supervise several key values as temperature or flowrate. It is possible to replace the

set values of temperature for example or to choose the order of work of pumps, boilers or groups.

On the following figure you can find the architecture of the central it allows you to have an idea about how

the data are managed.

33 InDeal / D1.5

Figure 3.12: Architecture of the Odysseum Central

Others set values as PID parameters or value about the Cascade launching of the pumps are setting on the

Centralized Technical Management (GTC in French). The values measured by counters at each substation

are emitted to a web portal manage by the brand Kamstrup. It means that this values do not go directly to

the monitoring post.

Figure 3.13: Schema of Kamstrup counter use

MultiSup

and counter

Primary Side Secondary Side

34 InDeal / D1.5

The Kamstrup counters are linked to a MultiSup which could permit to have access to the value of

temperature meter in the grid or the consumption of the motor of pump too. The MultiSup collects the data

from the counter and the meter every 15 minutes and store it. Then every 8 hours the MultiSup send the

values to the internet portal. The data are available on internet and could be extract in the following form.

If there is a malfunctioning the MultiSup transmits the alarm promptly.

Figure 3.14: Data extracted from the Kamstrup portal

The functioning highlight some troubles mainly about the communication between the counters which are

generally in basement. In this kind of situation antennas are used in order to have an internet access.

3.9 Current state and needs for improvement

As the DHCS is quite recent, the equipment is in very good general conditions. Every cold technical

equipment has a “Manufacturer” contract with a specific preventive maintenance and a replacement

guarantee. The water quality from the DHCS is monitored and treated. The preventive maintenance for the

cooling towers are drastic in order to respect the regulation against the Legionnaires’ disease.

Moreover, the existing DH control system guarantees both a global view of the substations behavior and a

post-optimization by monitoring the flowrates and temperatures settings.

However, the efficiency could be even better by monitoring and controlling the real time energy production

and supply data, especially by integrating the 14 existing and the 7 significant upcoming substations.

35 InDeal / D1.5

Table 3.12 Technical data for the case study in Montpellier (2016)

36 InDeal / D1.5

Table 3.13 Total heat production analysis in Montpellier’s DHCS for 2017


Positive Cold Production MWH 384 351 499 644 1010 2197 2375 2504 1182 960 507 408

End user cold delivery MWH 326 317 438 570 927 2041 2312 2378 1062 905 438 356

% Cold Thermal Lost % 85% 90% 88% 89% 92% 93% 97% 95% 90% 94% 86% 87%

Heating Production MWH 1902 939 792 465 319.5 178.5 159 133.5 135 175.5 669 1273.5

End user heat delivery MWH 1826 913 734 432 287 155 138 116 118 159 619 1216

% Heat Thermal lost 96% 97% 93% 93% 90% 87% 87% 87% 87% 91% 93% 95%

Figure 3.15 Comparison between the energy (kWh) produced and sold (cooling network) in Montpellier in 2017

0

500

1000

1500

2000

2500

3000


Production froid (MWh)

Livraison froid (MWh)

37 InDeal / D1.5

Figure 3.16 Comparison between the energy (kWh) produced and sold (cooling network) in Montpellier in 2017

Figure 3.17 Efficiency (%) of the Montepellier DH network per month for 2017

0

200

400

600

800

1000

1200

1400

1600

1800

2000


Production chaud (MWh)

Livraison chaud (MWh)

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%


% Cold Thermal Lost %

% Heat Thermal lost

38 InDeal / D1.5

4 Installation plan

The installation plan for both DHC networks has been agreed between the partners and is presented here

elaborating on how and where the new technologies will be installed and tested.

Where and how the meters will be installed

Vransko network:

Four (4) critical test sites in the network have been selected for the installation of the smart monitoring

controllers. These 4 substations are: (i) the farthest from the boiler room/central distribution, (ii) the central

distribution (boiler room) and (iii-iv) another two in the network in big substations in-between the plant

and the farthest one.

Montpellier network:

Two smart monitoring controllers will be installed in Montpellier’s network : (i) one in the plant central

station and (ii) the second in the farthest substations from the main station.

Which parameters will be monitored?

Based on the specific configuration and in order to be able to measure and send the data to the Central Monitoring and Control web platform (CMCP) the following parameters will be collected and stored in the CMCP database.

· flow [m3/h];

· flow temperature [° C];

· return temperature [° C];

· distributed power [kW]

Where and how the energy harvesters will be installed?

The two energy harvester systems will be installed and tested in Montpellier DHC network.

For this purpose, design of both water-flow energy harvester and thermal energy harvester will be defined

according to Montpellier network specifications. SNCU-SERM will provide technical specifications such

as flowrates, water temperature, pipes diameters and locations of several substations which could be

compatible with the integration of the energy harvester for the tests in real case conditions. After design

and fabrication, the two systems will be then tested in real environment.

Where and how the new materials and piping system will be installed and tested?

New insulation material will be tested only in laboratory, by the measurement of thermal conductivity and

compressive strength. New insulation material will not be installed in test sites for real case studies because

the target TRL planned for insulation material is TRL4, due to the fact that there is not an insulation material

manufacturer in the consortium, CEMITEC has not the capacity of producing the needed amount of new

insulating material and therefore the cost of demo insulation material in test sites for real case pipes is not

affordable.

39 InDeal / D1.5

New quick-fit joint will be tested in laboratory in relevant working conditions (TRL5), and, if during the

task T6.3 the validation in laboratory is successful, the possibility of installation in test sites for real case

studies will be analyzed.

New coating for obtaining reduced pressure head losses in pipes will be tested only in laboratory, according

to standards, and in relevant working conditions (TRL5). New coating will not be applied in test sites for

real case studies because the cost of demo new coating in test sites for real case pipes is not affordable.

How the proposed SW and control methodologies will be validated?

The KPI of the individual components and their targeted TRLs have been defined in D1.1. Apart from the

individual assessments, the consortium has decided to validate and prove the efficiency of the proposed

InDeal system in terms of cost reductions within the real operation of the network. The methodology for

a fair and accurate demonstration of the proposed system is the following.

Step1: at a given time t, we record all the set-points of the system. We observe the operation of the system

for a time period of Δt and a cost estimation is performed corresponding to the specific time period.

Step2: at the same time t, we run the InDeal solution that generates the optimal set-points of the network.

We perform the same cost analysis using the selected new set-points for the same time period Δt.

Step3: A cost comparison is performed between the existing operation of the system and the proposed

scheduling by InDeal.

Step4: The same process is repeated for a long period and the overall cost figures are calculated for both

approaches (the control strategy is currently adopted versus the proposed one by InDeal).

40 InDeal / D1.5

5 Annex

A. Vransko DH layout

41 InDeal / D1.5

B. Montepellier DH layout

Documents

PROJECT DELIVERABLE REPORT Project Title: Innovative ......EE-13-2015 Technology for district heating and cooling InDeal - 696174 InDeal / D1.5 Document Information Filename(s) InDeal_D1.5_