6.4.0.5 Thermal/Systems Pack · Solar water heater (on Hot water loop) Advanced heating coil ... a Hot water loop may have a Solar water heater and/or

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<Virtual Environment> 6.4.0.5Thermal/Systems PackNew Features

Integrated Environmental Solutions LimitedDevelopers of the IES <Virtual Environment>

July 2011

Contents

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<Virtual Environment> 6.4.0.5New Features

Introduction .......................................................................................................................................... 3

New Features in <VE> 6.4.0.5 ............................................................................................................. 4

Tabular Room Data editing for thermal properties............................................................................ 4

ApacheHVAC ................................................................................................................................... 6

Prototype systems library.............................................................................................................. 6

Heat sources................................................................................................................................. 8

Solar water heater....................................................................................................................... 14

Advanced heating coil ................................................................................................................. 15

Air-to-air heat pump .................................................................................................................... 16

Chilled water loop: integrated Waterside economizer ................................................................ 17

Chilled water loop: heat rejection by Fluid cooler....................................................................... 18

Over-capacity Hot water & Chilled water loop............................................................................. 19

Alternate system schedules: enhancements............................................................................... 20

BREEAM® Navigator ...................................................................................................................... 21

LZCT (ENE 1 and ENE 5 credits)................................................................................................ 22

Emissions and free cooling (ENE 1 and ENE 10 credits)............................................................ 23

Water and water recycling (WAT1 and WAT5 credits) ................................................................ 24

Materials specification and responsible sourcing (MAT1 and MAT5 credits) .............................. 25

Introduction

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IntroductionWelcome to IES <Virtual Environment> version 6.4.0.5 Thermal/Systems Pack. This documentprovides details of the New Features included in this version of <VE>.

Tabular Room Data Edit

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New Features in <VE> 6.4.0.5

Tabular Room Data editing for thermal properties

There is a new button in Apache, UK Part L2, and PRM “Tabular Room Data”. This tool represents areal productivity enhancement to model data entry and review.

It contains many useful items:

Rapid data input

Rapid data review

Copy / Paste (to/from excel)

Filters – only show the data of interest

Fully customisable tab setup (add,

remove columns, re-order etc)

Multi-room edit/review

Edit/Review variant model room data.

Perhaps the key benefit of tabular edit is the productivity gains it will provide for large project reviewand data modification. Key features include rapid data input, rapid data review and crucially, a copyand paste facility allowing data to be pasted directly to and from excel. You can use left-click, right-click, multi-select (shift / ctrl) etc. to modify and access data.

Tabular Room Data Edit

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Other key features are the ability to apply filters, allowing users to view only the data of interest.When filters are on, the column heading to which the filter is applied will contain a blue bar. Hoveringover this presents the user with a balloon tip summarising the current filter.

ApacheHVAC Enhancements

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ApacheHVAC

There are a significant number of enhancements to the HVAC functionality.

Prototype systems library

Heat sources: Hot water loop, Generic heat

source, inbuilt (non-networked) Heat pumps

Solar water heater (on Hot water loop)

Advanced heating coil

Air-to-air heat pumps

Chilled water loop: integrated Waterside economizer

Chilled water loop: heat rejection by Fluid cooler

Over-capacity Hot water & Chilled water loops

Alternate system schedules: enhancements

Prototype systems libraryInstead of loading all the predefined prototype systems at the same time, you now import them one ata time, by clicking the new Library button in the toolbar.

(The “S” button is retained, but now only used to either select entire system(s) or edit theirDescriptions).

In the library interface, you can specify the import placement by selecting the relevant “to-the-right” or“below” arrow buttons.


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Note that the 12 PRM-specific systems are distinguished, by both name and icon, from the general-purpose prototype systems. There is also a wider variety of systems available than in previousreleases.

In this release all the library systems share a common set of heating/cooling plant equipment (ofwhich each system only uses part). Normally an import on top of another will *not* duplicate the plant,but there are options to override this for heating and/or cooling. This would only be used occasionally,in the specific case where some or all of your current network’s plant has already been modified orsized, and you would like the coils in the imported system to be served instead by the original,unmodified, plant.


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Heat sourcesThe Heat source list now lists two different types of Heat source, each with associated heatingequipments:

1) Hot water loop: used to model heat sources involving hot water. Heating equipments areswitched in according to a user-specified sequencing scheme, and sized on the basis of user-specified load percentages.

2) Generic heat source: used to model other types of heat source, such as electrical resistance,furnace, steam loop etc. In this case there is a single (Part load curve) heating equipment andhence no equipment sequencing.

The associated heating equipment is of two types:1) Hot water boilers (HWB): associated with Hot water loop only, in any number.2) Part load curve heating plant (PLE): Hot water loop may have any number but a Generic heat

source has one only.

In addition to the above heating equipment, a Hot water loop may have a Solar water heater and/oran Air-to-water heat pump (AWHP). Please refer to the conceptual configuration below.

Secondary pump

Primary pump

Heat sources

Hot water loop

Tlbt

Tedb

ge

Tldb

gl

Key:

air

water

Vb

PLE 1

PLE 2

HWB 1

HWB 2

AWHP

CHPS

imp

leco

il

Ad

va

nce

dco

il

Ra

dia

tor

DH

W

Ab

so

rptio

nch

ille

r

Co

mm

on

pip

e

Solar water heater

CHR


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In ApacheHVAC the Heat sources list now appears as below, with the different types of Heatsources, and attached heating equipments, all indicated by four different types of icon.

The (single) Heat source designated to serve DHW loads, if any, is also indicated by red text.


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Hot water loop

As shown by the dialog tabs above and below, many of the parameters that were previously definedwithin an individual Hot water boiler are now shared among all the boilers in a loop, and therefore arenow defined at the Hot water loop level. Please refer to the ApacheHVAC manual for more details.


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Note that Heat pumps are no longer network objects.

When upgrading an existing HVAC network to version 6.4.0.5, a (networked) heat pump whosebackup is a Hot water boiler is upgraded to an Air-to-water heat pump attached to a Hot water loop(whose single Heating equipment is the old Hot water boiler). In the network the pump is replaced bya simple connector.


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The final Hot water loop tab (below) is conceptually similar to that for the existing Chilled water loop.It defines the Heating equipment set, and its sequencing and autosizing.


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Generic heat sourceThe Generic heat source edit dialog is shown below. As already mentioned above (under Hot waterloop), parameters such as Condenser heat recovery and CHP, that were previously defined withinthe Part load curve (Heating equipment), are now defined at the Heat source level.

Like the Hot water loop, a Generic heat source may have a heat pump attached, but in this case itfunctions as an Air-source heat pump.

When upgrading an existing HVAC network to version 6.4.0.5, a networked heat pump whose backupis a Part load curve heating plant is upgraded to either:

an Air-to-air heat pump (new separate object, described below) whose backup is a Generic heatsource (upgraded from the old Part load curve).

or under certain circumstances (see ApacheHVAC manual for more details), an Air-to-sourceheat pump attached to a Generic heat source (upgraded from the old Part load curve).

In both cases the pump (being no longer a network object) is replaced by a connector in the network.


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Solar water heaterA solar water heater in a Hot water loop is defined in exactly the same way as in the Apache view:


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Advanced heating coilParalleling the recently introduced Advanced Cooling coil modelling, there is now an Advancedheating coil model. This model makes the assumption that it is served by hot water, therefore onlyHot water loops are available for selection as the serving Heat source.

Unlike Advanced cooling coils, Advanced heating coils are autosized by Apache only; there is nomanual sizing option.


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Air-to-air heat pumpThe Air-to-air heat pump (AAHP) is a new component type.Instances of this type are intended to serve Simple heating coils, in place of an ASHP.

The Edit dialog for an AAHP is shown below. The Backup heat source is limited to Generic heatsources, but now many pumps can share the same backup. Furthermore the use of a backup is nowoptional.Another difference from the old ASHP is that the Output performance values are now expressed aspercentages of the maximum value (bottom row).


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Chilled water loop: integrated Waterside economizerThe new IWSE model enhances the current Waterside economizer modelling capability to provide forwaterside economizer operation as a pre-cooling device in conjunction with a chiller set. Thev6.4.0.5 implementation of the IWSE shares the heat rejection condenser water loop and tower withan Electric Water Cooled chiller.


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Chilled water loop: heat rejection by Fluid cooler

A fluid cooler is now available as an optional substitute for a cooling tower as the heat rejectiondevice in a chilled water loop.There are two types, or modes of operation, of a fluid cooler. These depend on the wetting conditionsof the surface of the coil in the stream of outside air.A dry fluid cooler is one where the coil is permanently dry. This type of cooler tends to be used inareas where there are restrictions on the availability of water.A wet/dry fluid cooler is one where the coil is sprayed with water to provide additional evaporativecooling. To prevent freezing of the water on the coil, these coolers can also operate as a dry fluidcooler.


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Over-capacity Hot water & Chilled water loopImprovement has been made to the modelling of undersized or overloaded heating and coolingsources. Previously, if equipment (heating coils, cooling coils, etc.) on a heating or cooling loopdemands more heating or cooling than the source is designed to provide, the demand is always met– the source performing above its design capacity.

Now deficiencies in capacity at the heating and cooling sources – hot water loops and chilled waterloops – will feed back to the air handling components they serve. In other words, the heating andcooling sources will always try to raise or reduce the return hot or chilled water temperature to thetarget supply water temperature. If the target supply water temperature cannot be reached, the returnwater temperature will be raised or reduced in response to the shortfall.

The adjusted water supply temperature only affects certain types of component. Advanced heatingand cooling coils respond to the adjusted supply temperature by reducing the amount of heating orcooling they are able to deliver. Other components, including simple heating and cooling coils,radiators and chilled ceilings, do not respond to the adjusted temperature. Their loads are dictatedsolely by conditions in the air-side system or the building. Likewise, any domestic hot water loadsplaced on a hot water loop, and loads placed on this loop by absorption chillers, are insensitive to thehot water loop supply temperature.

Generic heat sources continue to follow the old policy: for these heat sources a shortage of capacitydoes not feed back to the components they serve.


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Alternate system schedules: enhancementsThe system schedules dialog has been modified to allow the user to create alternative profiles. Thiswill allow the user to rapidly generate and edit multiple sets of alternative profiles. These newlycreated profiles can then be assigned to various scheduling scenarios for HVAC, setpoints etc.

BREEAM Navigator

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BREEAM® Navigator

A BREEAM® Navigator has been created which makes assessingBREEAM® 2008 credits much easier.

It assists with the calculation of 42 credits and 6 innovation points,covering:

Supported schemes are Offices, Schools, Higher Education,Healthcare and Retail:

Daylighting Emissions and Free Cooling

Indoor Air Quality Water and Recycling

Thermal Comfort Materials (Specification)

LZCT Materials (Responsible Sourcing)

BREEAM Navigator

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LZCT (ENE 1 and ENE 5 credits)The BREEAM® calculator allows extensive configuration of Renewable, low carbon, and greenpower options (select the Choose LZCT option in the navigator). When selecting any LZCTtechnologies through this interface, please ensure they are not also defined as part of your ApacheSystem or Apache renewables, else the double definition will cause incorrect simulation results.

BREEAM Navigator

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Emissions and free cooling (ENE 1 and ENE 10 credits)The credit calculation for Emissions (ENE1) credit requires the completion of an EPC Compliancesimulation. This requires a CIBSE weather file. For those users who do not have a Compliancelicence, a new interface is provided for basic Compliance configuration (Simulation settings):

For free cooling (ENE10) credit (only applicablefor schools and higher education), a configurationscreen allows the user to select the free coolingoptions that will be deployed (Confirm free coolingstrategies):

BREEAM Navigator

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Water and water recycling (WAT1 and WAT5 credits)The water appliances can be defined through the Edit appliance data option in the navigator. Thiswill show the following entry screen:

BREEAM Navigator

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Materials specification and responsible sourcing (MAT1 and MAT5 credits)The materials and constructions used within the building must be provided with a Green Guide rating,and given an appropriate Ecopoints building type. This is done through the new Edit Green Guideratings entry in the navigator, which launches the dialog below.The MAT5 credit requires further information not gathered by the <VE> and therefore cannot beautomatically calculated. However, the MAT5 materials report provides all the appropriate materialsinformation for easy entry into the appropriate BREEAM® calculator.

Documents

6.4.0.5 Thermal/Systems Pack · Solar water heater (on Hot water loop) Advanced heating coil ... a Hot water loop may have a Solar water heater and/or