Smartcool ECO3/ESM Screen Data Savings Report
Client Details/Building Address
Date
Summary
Overall average kWh savings were
across the test periods.
Internal temperature performance was excellent with only a slight change of
equal to
% change.
○°F
which is
The internal humidity performance was similar between the “OFF” periods & the “ON” periods.
During the Test Period, an average of
kWh were saved per day. Once seasonal weather
adjustments are factored in the total estimated savings are
kWh per year.
The
test installation of the Smartcool ESM/ECO3 has also provided significant
environmental benefits. The annual kWh savings is equivalent to the amount of electricity required
to supply approximately
homes and will reduce annual Greenhouse gas emissions by
pounds. To absorb an equivalent amount of greenhouse gases, one would have to plant
acres of trees.
Goal
To demonstrate that the Smartcool ESM/ECO3 will reduce the kWh usage of the
refrigeration/air conditioning units at the
facility, while maintaining pre-set temperature
performance.
Test Facility
is a
building located at
floors. It was built in
using
,
,
with
construction and the
sq. ft. of floor space on
is refrigerated / air conditioned.
Plant & Controls
The test was conducted on the
(Model #
) which are controlled by a
Controller.
These
units each have
compressors and cool the
floor of the facility. There is
also a
(Model #
) to cool the
floor.
Test Methodology
Smartcool’s M&V testing methodology follows Option B (Retrofit Isolation) of the International
Performance Measurement & Verification Protocol (IPMVP), where the savings of a single Energy
Conservation Measure (ECM) is calculated over a short period. The testing is performed using a
week OFF/week ON strategy, which will provide the most even comparison by monitoring the
site’s weekly operating conditions over the OFF and ON test periods (shown in the Proposed Test
Period table below). The installation and the switching of the Smartcool’s technology from RUN
(ON) to BYPASS (OFF) and the data collections will be conducted by qualified personnel. The M&V
test will commence once Smartcool’s Lead Engineer is satisfied with the operation of the air
conditioning / refrigeration systems and Smartcool’s technology.
For more information on M&V testing best practices please refer to “A Best Practice Guide to
Measurement and Verification of Energy Savings” produced by the Australasian Energy
Performance Contracting Association (http://www.eec.org.au/Best%20Practice%20Guides).
M&V Test Requirements
It is critical to the success of the M&V test that the operating conditions of the equipment to be
tested are similar over the OFF and ON test periods so that an accurate comparison can be made.
Any unusual issues observed during the test that could have any impact on the heat load or energy
consumption (irregular trading/operating patterns, maintenance, power outage, fire, etc.) must be
reported to the Project Manager for further review. Additional weeks of testing may be added as
required, based on the initial review of the data and type of issue observed during the test. All
settings, including thermostat control, must be ‘locked down’ and remain consistent
throughout the entire test period. If there is volatility in the energy consumption of the air
conditioning / refrigeration units, Smartcool may request another test site or an extension of the
test may be required.
Data Explanation
Required Measurements
 Compressor Run, Bypass and Override hours before and after ECM retrofit
 Outside ambient air temperature before and after ECM retrofit
Outside Air Temperature
Monitoring of outdoor temperature will be performed using the nearest suitable weather station
listed on the http://www.wunderground.com/ on-line tool.
Data Collections
The ESM/ECO3 Run, Save, Bypass and Override hours, along with the unit’s set point, must be
recorded with the date and time on the Site Report at the same time of day each week (as per the
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Proposed Test Period table below). While in a 7 Day Bypass, the ESM/ECO3 will countdown from
168 hours and will automatically come out of Bypass after 7 days to begin saving. Any issues with
the equipment should be determined at this time and recorded on the Site Report. It is imperative
that the readings are taken at the same time of day each week as the start of the test.
When putting the ESM/ECO3 into Bypass at the beginning of Week 1, the ESM/ECO3 screen must
show “168”, which verifies that the ESM/ECO3 is in a 7 Day Bypass. When collecting the data at the
end of Week 1, a full week (168 hours) must have passed since the unit was placed into Bypass and
it should be verified that the ESM/ECO3 has come out of Bypass. In the event that additional
testing is required after the end of Week 2, the ESM/ECO3 should be put back into a 7 Day Bypass.
Required Steps
1. Installation of Smartcool’s technology
Install Smartcool’s technology as per Smartcool’s Proposal.
Ensure the air
conditioning/refrigeration units are working properly with no maintenance scheduled
during the test.
2. Full Test – 2 weeks duration1
After the installation is complete, and Smartcool’s Lead Engineer is satisfied with the
operation of the system, the test will begin. The test will run for a two week period, with
Smartcool’s technology automatically switching from Bypass mode (OFF) to Run mode
(ON) to after the completion of Week 1. While in Bypass, Smartcool’s technology will have
no effect on the operation of the air conditioning / refrigeration systems.
Proposed Test Period
TASK
Data Collection or Clear Screen Hours/Put
ESM/ECO3 into 7 day Bypass/Record Time
& Set Point
1 Week Test OFF
Data Collection
1 Week Test ON
Data Collection/Put ESM/ECO3 into 7 day
Bypass
1 Week Test OFF – IF REQUIRED
Data Collection – IF REQUIRED
1 Week Test ON – IF REQUIRED
Data Collection – IF REQUIRED
1 Subject
PERIOD
Day 1
Day 1-7
Day 7
Day 7 – 14
Day 14
TIME/DATE
Ex. 1:00pm
Ex. 1:00pm
Ex. 1:00pm
Day 14 –
21
Day 21
Ex. 1:00pm
Day 21 –
28
Day 28
Ex. 1:00pm
to no significant variations in the weather or other operational variables during the off and on test periods.
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Proof of Savings
At the conclusion of the M&V test a comparison of the ambient temperature and ESM/ECO3
screen data, showing the compressor Run, Manual Bypass and Automatic Override hours, will be
created. The report will provide details of any financial and environmental benefits and outline the
cost effectiveness of the installation of Smartcool’s technology.
During the first week, the actual run time of the compressors will be accumulated as Manual
Bypass hours (these only accumulate when the compressor is actually being called for). During the
second week, the Run hours of the compressors are accumulated in Run and Automatic Override
hours. By comparing the total run hours each week, the savings can be determined as follows:
Week 1
Week 2
Run Hours
0
33
Manual Bypass Hours
40
40
Automatic Override Hours
0
1
Therefore during Week 1 of Manual Bypass (OFF), the compressor run time was 40 hours and
during Week 2 (ON), the compressor run time was 34 hours (Run hours + Automatic Override
hours). By dividing the compressor run time from Week 2 (34 hours) by the compressor run time
from Week 1 (40 hours), the result is 15% savings. It is extremely important that the conditions
during the test are similar between the two weeks so as to ensure an accurate comparison.
To estimate the kWh consumption of the air conditioning / refrigeration units from the ESM/ECO3
screen data, you must first convert single phase to three phase where required. This is done by
multiplying the RLA by 1.732. The three phase RLA is then multiplied by the voltage and power
factor to determine the Watts, which are divided by 1000 to produce the kW rating. The kW rating
is then multiplied by the Run, Automatic Override and Manual Bypass hours to determine the kWh
used by the system. The difference between the Run + Automatic Override kWh and the Manual
Bypass kWh is equal to the savings over even test periods. Alternatively, a power meter can be
used to record the kW demand for each compressor. For a dual channel, be sure to use the kW for
each compressor.
The M&V test will be considered successful if the projected kWh reduction, based on the test data,
is within 10% of the stated estimate in the Proposal. The success of this test will be independent of
subsequent testing or rebate applications with any other third party.
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