Section 16 – Economizer Savings Estimator
63-8594-02 Honeywell Economizers 182
Honeywell has an easy to use savings
estimation software that was designed by
independent consulting Energy Engineers in
1999 and is updated every 3 or 4 years. The
software allows the user to input information
about the equipment on a building, type of
control, occupancy schedule, cost of adding
various economizer and DCV options and
demand and electrical charges. With the
simple click of the mouse, the software will
print an estimation of the electrical and gas
usage in the building and will estimate the
savings and payback for the upgrade options
and location the user has chosen.
You can choose the default settings for a
building type or set your own occupancy
schedule and control set points for the
buildings.
To download the program:
Go to www.customer.honeywell.com/
economizertools. The Economizer Savings
Estimator download will appear (it is a zipped
folder). Click on it and open it or save it. Also,
the JADE
TM
Economizer Demo download is
available at this location.
You can choose to download all weather files
for the US, Canada and California climate
zones or just the files you need for your
region.
The savings is based on 112 years of weather
data from 1900 to 2012.
Make sure you update the cost of electricity
and demand charges in your region. The
software will error if you do not add in the gas
and electricity charges for the location.
The savings estimator evaluates the operating
costs, cost savings, and payback period
associated with alternate control strategies or
a limited number of small prototypical
commercial buildings and one residential
option. The program performs hourly
calculations with fairly detail models of the
building and equipment in order to determine
the gas energy, electrical energy, and
electrical demand costs. This program is not
useful as an energy audit tool for a specific
building. However, it does allow the user to
study the impact of the following variables:
•Climate
• Building size
• Occupancy schedule
• Utility rates
• Equipment type and efficiency
• Cost of controls
The actual costs from this program could differ
significantly from those for a particular building
due to differences in building specifications,
equipment characterizes, specific yearly
weather conditions, actual occupancy, etc.
However, it is expected that the percentage
cost savings associated with the alternative
control strategies would be similar for similar
building types.
For more detailed description of the data used
to calculate the cost savings, click on the
“Tools” tab at the top of the first screen of the
Estimator and choose “Help”.
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