Case Study for Evaporcool

1. ®
Performance Analysis
500 Ton RTAC Chiller
Houston, TX
Evaporcool Solutions, LLC
5100 Wilfong Road, Memphis, TN 38134
Phone: 901-382-7809 Fax: 901-382-7819
E-mail: ContactUs@evaporcool.com

2. PERFORMANCE ANALYSIS
Two identical 500-Ton RTAC chillers were monitored to
quantify energy savings from the Evaporcool System.
Step 1: Baseline Testing
The performance of two identical chillers were recorded from 6/26/10 until 7/7/10.
Step 2: Installation of Evaporcool System
The Evaporcool System installation on the Test Unit began on 7/7/10. The unit was
brought on-line on 7/10/10 and performance had stabilized mid-day on 7/11/10.
Step 3: Comparison Testing
The performance of both chillers were recorded from 7/12/10 until 8/1/10.
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3. PERFORMANCE ANALYSIS
Comparison Unit
Test Unit
Houston, TX
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4. PERFORMANCE ANALYSIS
Before
Test Unit
After
Test Unit
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5. TEST CONDITIONS
The weather during the Baseline Testing was significantly
cooler and wetter than during the Evaporcool Test Period.
BASELINE TEST PERIOD EVAPORCOOL TEST PERIOD
Average CDD = 18.6 Average CDD = 20.1
Average Daily Precipitation = 0.59” Average Daily Precipitation = 0.18”
Definition: COOLING DEGREE DAY (“CDD”)
A unit used to relate the day's temperature to the energy
demands of air conditioning. One cooling degree day occurs for
each degree the daily mean temperature is above 65 Fahrenheit.
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6. WATER USAGE
Below is the calculated water usage for the Evaporcool System on
an average day during the Evaporcool Testing Period.
WEATHER WATER USAGE
Min Temp = 76 Min Hourly = 3.9 gal.
Max Temp = 92 Max Hourly = 66 gal.
Mean Temp = 84 (CDD = 19) Mean Hourly = 21.7 gal.
Avg. Relative Humidity = 71% Daily Total = 522 gal.
NOTE: All water is evaporated, not run through municipal
sanitary sewage systems. Accordingly, only water
usage fees should be considered.
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7. BASELINE TEST
Both chillers operated with exactly the same average kW/Ton
during the baseline period.
1.30
AVERAGE = 1.17 kW/Ton
1.25
1.20
Chiller 1
kW/Ton
1.15 Chiller 3
Average
1.10
1.05
1.00
26-Jun 27-Jun 28-Jun 29-Jun 30-Jun 1-Jul 2-Jul 3-Jul 4-Jul 5-Jul 6-Jul
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8. EVAPORCOOL TEST
During the testing period, the Comparison Unit (without Evaporcool),
operated with an average efficiency of 1.32 kW/Ton.
1.45
AVERAGE = 1.32 kW/Ton
1.40
1.35
1.30 Chiller 1
kW/Ton
Ch 1 Average
1.25
1.20
1.15
1.10
1.05
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9. EVAPORCOOL TEST
The Test Unit, with Evaporcool, operated with an average
efficiency of 1.21 kW/Ton.
1.45
AVERAGE = 1.32 kW/Ton
1.40
1.35
1.30 Chiller 1
kW/Ton
Ch 1 Average
1.25
Chiller 3
Ch 3 Average
1.20
1.15
1.10
AVERAGE = 1.21 kW/Ton
1.05
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10. EVAPORCOOL TEST
The shaded area represents the efficiency improvement caused by
the Evaporcool System.
1.45
1.40
1.35
1.30
Chiller 1
kW/Ton
1.25 Chiller 3
1.20
1.15
1.10
1.05
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11. EVAPORCOOL TEST
The efficiency improved at every temperature.
1.45
1.40
1.35
Chiller 1
kW/Ton
1.30
Ch 1 Average
1.25
Chiller 3
1.20
Ch 3 Average
1.15
1.10
1.05
24
Weather Data
22
CDD
20
18
CDD
16
14
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12. EVAPORCOOL TEST
The efficiency improvement was greatest on the warmest days.
1.45
1.40
1.35
Chiller 1
kW/Ton
1.30
Ch 1 Average
1.25
Chiller 3
1.20
Ch 3 Average
1.15
1.10
1.05
24
Weather Data
22
CDD
20
18
CDD
16
14
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13. EVAPORCOOL TEST
As expected, the efficiency improvement was smallest when it rained.
1.45
1.40
1.35
Chiller 1
kW/Ton
1.30
Ch 1 Average
1.25
Chiller 3
1.20
Ch 3 Average
1.15
1.10
1.05
2.50
Weather Data
Precipitation
2.00
1.50
1.00
Precipitation
0.50
0.00
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14. HOURLY RESULTS
Below are the hourly results from a typical day of testing.
1.50
1.45
1.40
1.35
1.30
Chiller 1
kW/Ton
1.25 Ch. 1 Avg.
Chiller 3
1.20
Ch. 3 Avg.
1.15
1.10
1.05
July 22nd, 2010
(CDD=20)
® - PRIVILEGED AND CONFIDENTIAL - ®

15. HOURLY RESULTS
Savings are greatest during peak hours, when most energy is being consumed.
1.50
1.45
1.40
1.35
1.30
Chiller 1
kW/Ton
1.25 Ch. 1 Avg.
Chiller 3
1.20
Ch. 3 Avg.
1.15
1.10
1.05
July 22nd, 2010
(CDD=20)
® - PRIVILEGED AND CONFIDENTIAL - ®

16. SAVINGS
Based on kWh reduction alone, this case study shows a
customer ROI of between 1.53 and 2.55 years.
… and the Evaporcool System provides many additional benefits…
Additional benefits include:
1. Peak Demand Reduction;
2. Increased Capacity;
3. Maintenance Savings;
4. Reduced Equipment Failure;
5. Increased Equipment Life; and
6. Available Tax Benefits.
® - PRIVILEGED AND CONFIDENTIAL - ®

17. ®
5100 Wilfong Road, Memphis, TN 38134
Phone: 901-382-7809 Fax: 901-382-7819
E-mail: ContactUs@evaporcool.com