Belimo Energy Valve™
Investing in
Efficiency
Belimo Americas
Danbury, Connecticut
1
Chiller Plants Overall Energy Efficiency
Manufacturer Chiller Plant
Efficiency Coefficient♦
Average Chiller Plant
Efficiency Coefficient♦
Actual
Delta T [F]
A (Office)
4.26
2.02
2.4
B (Museum)
4.78
2.87
2.8
C (Bank)
3.15
2.14
3.6
D (Office)
3.87
0.84
0.7
Plant
♦ Higher Efficiency Coefficient reflects higher plant efficiency
Source:
Belimo Americas
Danbury, Connecticut
2
Chiller Plants Overall Electric Consumption
Plant A (Office)
Plant B (Museum)
Pumps
Avg
25.5%
Chillers
Avg
51%
Plant C (Bank)
Plant D (Office)
Belimo Americas
Danbury, Connecticut
3
US Cooling Energy Usage
Cooling Energy
Cooling Energy
Other US Electric Energy
Other US Residential & Commercial
Electric Energy
89%
85%
11%
15%
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)
Belimo Americas
Danbury, Connecticut
4
Belimo Energy Valve™
is the Solution
The Energy Valve is a:
Pressure Independent
Control Valve
with an integrated
Delta T Manager
Belimo Americas
Danbury, Connecticut
5
Belimo Energy Valve™
•
•
•
•
•
•
Chilled Water Plant Energy Consumption
Energy Valve Benefits and Features
Risk Free Investment
Savings Estimator
Case Studies
www.energyvalve.com
Belimo Americas
Danbury, Connecticut
6
Pressure Independent and Delta T Manager
Pump Savings in Large Tech Company in NC
♦ Pressure Independent
♦ Pressure Dependent
Delta T Manager + PI
96 GPM
Pressure Independent (PI)
144 GPM
Pressure Dependent
240 GPM
Belimo Americas
Danbury, Connecticut
7
Benefits of Energy Valve
• Saves on Pump
• and Chiller Energy
Belimo Americas
Danbury, Connecticut
8
Benefits of using Energy Valve
Save Energy
35
1
350
Power = kBTU/hr
300
30
2
25
Coil
Power Curve
250
20
200
Delta T °F
335
330
15
150
Delta T Curve
10
12°F
10.5°F
100
5
50
0
0
0
5
10
15
20
25
30
35
40
45
GPM
Belimo Americas
Danbury, Connecticut
50
55
60
55 GPM
65
70
75
80
65 GPM
9
Low Delta T
Cost of Overflowing the Coil…
kBTU/hr
GPM
Pump hp
1
2
Δ
330
335
1.5%
55 GPM
65 GPM
3
Hp increase = (65/55)
18%
65%
HP2  GPM 2 

 
HP1  GPM 1 
Belimo Americas
Danbury, Connecticut
3
10
Low Delta T
Cost of Chiller Staging
Chiller Plant Efficiency
Design Condition
• Design delta T=12oF (54oF - 42oF)
• 360 GPM
• 1 Chiller, 90% Load (180 Ton)
360 GPM Loop flow
Belimo Americas
Danbury, Connecticut
11
Low Delta T
Cost of Chiller Staging
Chiller Plant Efficiency
A drop in delta T causes more GPM
Low delta T
o
• Delta T=10.4 F (52.4oF - 42oF)
•
415 GPM
•
2 Chillers, 45% Load (180 Ton)
415 GPM Loop flow
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.
Belimo Americas
Danbury, Connecticut
12
Features of Energy Valve
• Power Control maintains coil
power regardless of system
variations
• Built-in Energy Metering
• Multiple Communication
Options
Belimo Americas
Danbury, Connecticut
13
Power Control
0
• Power Control maintains a
coil power set point
regardless of pressure and
temperature fluctuations
Coil Power (kBTU/hr)
What is Power Control ?
• A control algorithm that
creates a Linear
relationship between
control signal and kBTU/hr
output
1000
Definition
0V
10V
Control Signal
Belimo Americas
Danbury, Connecticut
14
Power Control
Example
7.5 VDC = 750 kBTU/hr
750
300
3 VDC = 300 kBTU/hr
0
Example: 83 Ton AHU
83 Tons ~ 1000 kBTU/hr coil
1000
Power Control allows the controller to deliver exact energy to the space
0 to 10 VDC = 0 to 100% kBTU/hr Capacity
Coil Power (kBTU/hr)
•
•
0V
3V
7.5V
10V
Control Signal
Belimo Americas
Danbury, Connecticut
15
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) x
Temperature Change (°F)
Belimo Americas
Danbury, Connecticut
16
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.
Belimo Americas
Danbury, Connecticut
17
Belimo Energy Valve™
Communication
Belimo Americas
Danbury, Connecticut
18
Belimo Energy Valve™
Communication: Web Server
•
•
•
Energy Analysis
Flow and Temperature Analysis
Comparative Analysis
Belimo Americas
Danbury, Connecticut
19
Low Risk Investment
Energy Efficiency
Investing?
Belimo Americas
Danbury, Connecticut
20
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 .
Belimo Americas
Danbury, Connecticut
21
Belimo Energy Valve™
Savings Estimator
Belimo Americas
Danbury, Connecticut
22
Belimo Energy Valve
Does it really work?
Belimo Americas
Danbury, Connecticut
23
Case Study
MIT 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, 2011
DT = 12.14°F
Belimo Americas
Danbury, Connecticut
24
Case Study
University 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
Belimo Americas
Danbury, Connecticut
25
Conclusion
Belimo Americas
Danbury, Connecticut
26
www.energyvalve.com
Information and resources
Belimo Americas
Danbury, Connecticut
27
Belimo Energy Valve™
Thank You
Belimo Americas
Danbury, Connecticut
28