1Belimo Americas Danbury, Connecticut

Belimo Energy Valve™

Investing inEfficiency

Chiller Plants Overall Energy Efficiency

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Source:

Plant Manufacturer Chiller Plant Efficiency Coefficient♦

A (Office) 4.26

B (Museum) 4.78

C (Bank) 3.15

D (Office) 3.87

Average Chiller Plant Efficiency Coefficient♦

2.02

2.87

2.14

0.84

Actual Delta T [F]

2.4

2.8

3.6

0.7

♦ Higher Efficiency Coefficient reflects higher plant efficiency

Chiller Plants Overall Electric Consumption

3Belimo Americas Danbury, Connecticut

Chillers Avg51%

Pumps Avg

25.5%

Plant A (Office)

Plant D (Office)Plant C (Bank)

Plant B (Museum)

US Cooling Energy Usage

4Belimo Americas Danbury, Connecticut

15%

85%

Cooling EnergyOther US Residential & Commercial Electric Energy

Source: US Energy Information Administration (eia)How much electricity is used for cooling in the United States?(www.eia.gov/tools/faqs/faq.cfm?id=98&t=3)

11%

89%

Cooling Energy Other US Electric Energy

Belimo Energy Valve™is the Solution

5Belimo Americas Danbury, Connecticut

The Energy Valve is a:Pressure Independent

Control Valve

with an integrated Delta T Manager

Belimo Energy Valve™

6Belimo Americas Danbury, Connecticut

• Chilled Water Plant Energy Consumption• Energy Valve Benefits and Features• Risk Free Investment• Savings Estimator• Case Studies• www.energyvalve.com

Belimo Americas Danbury, Connecticut

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Pressure Dependent 240 GPM

144 GPM

96 GPM

Pressure Independent (PI)

Delta T Manager + PI

Pressure Independent and Delta T ManagerPump Savings in Large Tech Company in NC

♦ Pressure Independent♦ Pressure Dependent

Benefits of Energy Valve

8Belimo Americas Danbury, Connecticut

• Saves on Pump • and Chiller Energy

Belimo Americas Danbury, Connecticut

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0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 801

50001

100001

150001

200001

250001

300001

350001

0

2

4

6

8

10

12

GPM

Pow

er =

kB

TU/h

r

Del

ta T

°F

335

10.5°F

65 GPM

12°F

55 GPM

330

CoilPower Curve

Delta T Curve

1

2

Benefits of using Energy ValveSave Energy

Belimo Americas Danbury, Connecticut

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Pump hp Hp increase = (65/55)3 65%

1 2 ΔkBTU/hr 330 335 1.5%GPM 55 GPM 65 GPM 18%

3

1

2

1

2

GPMGPM

HPHP

Low Delta TCost of Overflowing the Coil…

Belimo Americas Danbury, Connecticut

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Low Delta TCost of Chiller Staging

Chiller Plant Efficiency

• Design delta T=12oF (54oF - 42oF)

• 360 GPM

• 1 Chiller, 90% Load (180 Ton)

Design Condition

360 GPM Loop flow

Belimo Americas Danbury, Connecticut

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Chiller Plant Efficiency

A drop in delta T causes more GPM

Low delta T

• Delta T=10.4oF (52.4oF - 42oF)

• 415 GPM• 2 Chillers, 45% Load (180 Ton)

No change to the load, but a 2nd Pump and 2nd Chiller are started.If cooling towers exist, additional cooling tower and pump may start.

415 GPM Loop flow

Low Delta TCost of Chiller Staging

Features of Energy Valve

13Belimo Americas Danbury, Connecticut

• Power Control maintains coil power regardless of system variations

• Built-in Energy Metering• Multiple Communication

Options

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Power ControlDefinition

What is Power Control ?• A control algorithm that

creates a Linear relationship between control signal and kBTU/hr output

• Power Control maintains a coil power set point regardless of pressure and temperature fluctuations

Control Signal

0 10

00

0V 10V

Coi

l Pow

er (k

BTU

/hr)

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• Power Control allows the controller to deliver exact energy to the space• 0 to 10 VDC = 0 to 100% kBTU/hr Capacity

Coi

l Pow

er (k

BTU

/hr)

0V 10VControl Signal

0 10

00

3V30

0

Example: 83 Ton AHU83 Tons ~ 1000 kBTU/hr coil

3 VDC = 300 kBTU/hr

7.5 VDC = 750 kBTU/hr

7.5V

750

Power ControlExample

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Belimo Energy Valve™Energy Metering

• By measuring Flow (Electronic Flow Sensors)and

• Delta Temperature (RTD sensors)

• the Energy Valve can calculate Power/Energy

Power: Q (BTU/hr) = 500 x Flow (GPM) xTemperature Change (°F)

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Belimo Energy Valve™Energy Metering Usage

• Energy Measurement

• Use as System Verification Tool during commissioning.

• Establishes a baseline performance for operation over time.

• Contributes to LEED.

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Belimo Energy Valve™Communication

VOLT CURRENT

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Belimo Energy Valve™Communication: Web Server

• Energy Analysis• Flow and Temperature Analysis• Comparative Analysis

Low Risk Investment

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Energy Efficiency Investing?

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Energy Efficiency is a Low Risk Investment

Source: Laitner, J., Ehrhardt-Martinez, K. and Prindle, W., 2007, “American Energy Efficiency Investment Market”, Energy Efficiency Finance Forum, American Council or and Energy Efficient Economy .

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Belimo Energy Valve™Savings Estimator

Belimo Energy Valve

Does it really work?

23Belimo Americas Danbury, Connecticut

Belimo Americas Danbury, Connecticut

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Case StudyMIT University Hayden Library - Boston, MA

Building and Project Details• 150,000 sq. ft. on 3 floors• 6 AHU provide majority of the cooling

Results• Aug 9 - Oct 9, 2010

DT = 6.15°F

• Aug 9 - Oct 9, 2011DT = 12.14°F

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Case StudyUniversity of Miami Hospital

Building and Project Details• Rosenstiel Building• 11 AHUs• 2600 Tons of Cooling• Over 10,000 GPM

Results• Delta T raised from

5.5°F to 10.5°F• Flow ~ 5600 GPM• Estimated $66,000/yr savings• Estimated 2.9 year payback

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Conclusion

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www.energyvalve.comInformation and resources

Belimo Energy Valve™

Thank You

28Belimo Americas Danbury, Connecticut