Technology at work in your facility boilers:chillers

High Performance Buildings:

Chiller Efficiency Ideas

Achieving Superior Performance for Life 2

• Russ Phillips is a System Sales Engineer for Trane and is

responsible for developing and delivering building modernization and

improvement services and solutions.

• Russ has been with Trane for 11 years and has been in various sales

and leadership roles within the organization.

• He earned a bachelor’s degree in mechanical engineering from the

University of Missouri. He is also a registered professional engineer

(PE).

My Background


• Dedicated Heat Recovery Chillers

• Ice Storage

Our Agenda


•Simultaneous Chilled and Hot Water •Easy Addition to any Hydronic System •One to Four Year Payback •75% Reduction in CO2 Emissions •10 Tons to 1000 Tons •Hot Water Temps as high as 180°F

DEDICATED HEAT RECOVERY CHILLERS


Dedicated Heat Recovery Chiller

55F 45F

120F 130F

Where to Apply

•VAV Reheat

•Domestic Hot Water

•Low Temperature Heating

Cooling

Load

Heating

Load

$0.10/Therm

1.6 Kg CO2

per Therm

$1.11/Therm

5.9 Kg CO2

per Therm


Scenario 1: Chiller and Boiler both running

Chiller Cooling = 0.6 kw/Ton @ $0.10/kwh

= $0.51/100 MBTU

Boiler Heating = $1.00 THERM Natural Gas @ 80% Efficiency

= $1.25/100 MBTU

Total = $1.76



Scenario 2: Boiler both running, Airside Economizer

Economizer Cooling = Free (outside air)

Boiler Heating = $1.00 THERM Natural Gas @ 80% Efficiency

= $1.25/100 MBTU

Total = $1.25



Scenario 3: Dedicated Heat Recovery Chiller

HR Chiller Cooling = @0.85 kw/Ton @ $0.10/kwh

= $0.71/100 MBTU

HR Chiller Heating = 125 MBH of Free Heat

Total = $0.71 » 60% savings versus scenario 1

» 43% savings versus scenario 2



Ice Storage


Travel Cooling

•Oversized for Most Use

•Plenty Horsepower

•Anytime Utility

•Expensive to Operate

•Oversized for Most Use

•Plenty Tons or Refrigeration

•Anytime Cooling

•Expensive to Operate

The Conventional Way…


Hybrid Travel Hybrid Cooling

•“Right” Sized Engine - handles

load efficiently most of the time

•Electric motors – kick in when

extra power is needed

•Battery – charged when

plugged in or braking

•“Right” Sized Chillers - handle load

efficiently most of the time

•Energy Storage – kick in when extra

cooling is needed

•Storage Tanks – are efficiently

charged at night when costs are low.

Today…

+


What’s a chiller’s electricity cost/ton to operate for 1 summer month ?

• Electric Rate

– Energy Charge = $0.07/kwh

– Demand Charge = $12/kw

• Chiller Assumptions

– 10 EER = 1.2 kw/ton

– Full load hours = 8 hrs/day x 5 days/week x 4 weeks/month = 160

• Energy Consumption Costs

– 1.2 kw x 160 hrs x $0.07/kwh = $13.44

• Demand Costs

– 1.2 kw x $12/kw = $14.40

• Demand = 14.40/(14.40 + 13.44) = 52% of the electric bill


What’s the Battery Look Like?

1190C2F

Around 20 tons of

cooling for 8 hours

3 Model 1500C2F’s

Around 180 tons of

cooling for 8 hours

1190C2F

- Requires less than 1% of conditioned space

- 40 + year life

- No mechanical fittings

- 10 year standard warranty; 20 years available

- 100% NON corrodible materials


Ice Storage Example

• Peak Cooling Load: 400 tons

• Conventional Chiller Plant Design

– Air cooled chillers

Qty 1 – 400 ton chiller

• Ice Storage Plant

– Air cooled chiller

Qty 1 – 240 ton chiller

1,200 ton-hours ice storage


Design Day Cooling Load Profile

0

50

100

150

200

250

300

350

400

450

Cooling Load

Ice Storage Example


0

50

100

150

200

250

300

350

400

450Ice Burn

Chiller To Ice

Chiller To Load

Plenty of time to re charge the battery! Typically use 6 to 12 hours!

40% load shift


Ice Storage Example


0

100

200

300

400

500Ice BurnChiller To Ice

40% load shift

Demand Savings:

$12/kw x 160 tons x 1.2 kw/ton x 6 months = ~$14,000 per year


Ice Storage Example


Russ Phillips

System Sales Engineer

Tennessee District

Trane

901-230-0468

[email protected]

Contact Information

mailto:[email protected]

Business

Technology at work in your facility boilers:chillers