evaporcool case study (500 ton rtac) (roi only))
DESCRIPTION
Case Study for EvaporcoolTRANSCRIPT
Performance Analysis500 Ton RTAC Chiller
Houston, TX
®
Evaporcool Solutions, LLC
5100 Wilfong Road, Memphis, TN 38134
Phone: 901-382-7809 Fax: 901-382-7819
E-mail: [email protected]
® ®
PERFORMANCE ANALYSIS
Step 1: Baseline TestingThe performance of two identical chillers were recorded from 6/26/10 until 7/7/10.
Step 2: Installation of Evaporcool SystemThe 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 TestingThe performance of both chillers were recorded from 7/12/10 until 8/1/10.
Two identical 500-Ton RTAC chillers were monitored to quantify energy savings from the Evaporcool System.
® ®
PERFORMANCE ANALYSIS
Comparison Unit
Houston, TX
Test Unit
® ®
PERFORMANCE ANALYSIS
Before
After
Test Unit
Test Unit
® ®
The weather during the Baseline Testing was significantly cooler and wetter than during the Evaporcool Test Period.
TEST CONDITIONS
BASELINE TEST PERIOD EVAPORCOOL TEST PERIOD
Average CDD = 18.6Average Daily Precipitation = 0.59”
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.
Average CDD = 20.1Average Daily Precipitation = 0.18”
® ®- PRIVILEGED AND CONFIDENTIAL -
WATER USAGE
WEATHER WATER USAGE
Min Temp = 76Max Temp = 92Mean Temp = 84 (CDD = 19)
Avg. Relative Humidity = 71%
Below is the calculated water usage for the Evaporcool System on an average day during the Evaporcool Testing Period.
Min Hourly = 3.9 gal.Max Hourly = 66 gal.Mean Hourly = 21.7 gal.
Daily Total = 522 gal.
NOTE: All water is evaporated, not run through municipal sanitary sewage systems. Accordingly, only water usage fees should be considered.
® ®
1.00
1.05
1.10
1.15
1.20
1.25
1.30
26-Jun 27-Jun 28-Jun 29-Jun 30-Jun 1-Jul 2-Jul 3-Jul 4-Jul 5-Jul 6-Jul
Chiller 1
Chiller 3
Average
kW/T
on
BASELINE TEST
Both chillers operated with exactly the same average kW/Ton during the baseline period.
AVERAGE = 1.17 kW/Ton
® ®
kW/T
on
During the testing period, the Comparison Unit (without Evaporcool), operated with an average efficiency of 1.32 kW/Ton.
EVAPORCOOL TEST
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
Chiller 1
Ch 1 Average
AVERAGE = 1.32 kW/Ton
® ®
kW/T
on
The Test Unit, with Evaporcool, operated with an average efficiency of 1.21 kW/Ton.
EVAPORCOOL TEST
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
Chiller 1
Ch 1 Average
Chiller 3
Ch 3 Average
AVERAGE = 1.32 kW/Ton
AVERAGE = 1.21 kW/Ton
® ®
kW/T
on
The shaded area represents the efficiency improvement caused by the Evaporcool System.
EVAPORCOOL TEST
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
Chiller 1
Chiller 3
® ®
14
16
18
20
22
24
CDD
EVAPORCOOL TESTkW
/To
nC
DD
The efficiency improved at every temperature.
We
ath
er
Dat
a
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
Chiller 1
Ch 1 Average
Chiller 3
Ch 3 Average
® ®
14
16
18
20
22
24
CDD
EVAPORCOOL TESTkW
/To
nC
DD
The efficiency improvement was greatest on the warmest days.
We
ath
er
Dat
a
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
Chiller 1
Ch 1 Average
Chiller 3
Ch 3 Average
® ®
0.00
0.50
1.00
1.50
2.00
2.50
Precipitation
kW/T
on
As expected, the efficiency improvement was smallest when it rained.
EVAPORCOOL TESTP
reci
pit
atio
n
We
ath
er
Dat
a
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
Chiller 1
Ch 1 Average
Chiller 3
Ch 3 Average
® ®- PRIVILEGED AND CONFIDENTIAL -
Below are the hourly results from a typical day of testing.
HOURLY RESULTS
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
Chiller 1
Ch. 1 Avg.
Chiller 3
Ch. 3 Avg.kW/T
on
July 22nd, 2010 (CDD=20)
® ®- PRIVILEGED AND CONFIDENTIAL -
HOURLY RESULTS
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
Chiller 1
Ch. 1 Avg.
Chiller 3
Ch. 3 Avg.kW/T
on
July 22nd, 2010 (CDD=20)
Savings are greatest during peak hours, when most energy is being consumed.
® ®- PRIVILEGED AND CONFIDENTIAL -
SAVINGS
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.
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…
®
5100 Wilfong Road, Memphis, TN 38134
Phone: 901-382-7809 Fax: 901-382-7819
E-mail: [email protected]