Ice
Arena in Washington State
Testing Data and Analysis
On February
25, 2004 we ran a test of the STEMS energy management system
on the chiller in an Ice Arena in Lynnwood, Washington.
The test results are as follows:
Description
Pre-test Without
STEMS
Post-test With
STEMS
Amount of Change
Volts
460
460
-0-
Amps
427.42
369.1
-58.32
Power
Factor
.65
.74
+ .09
KVAR
(reactive power)
43.43
35.134
-9.162
Volts
x Amps x Power Factor x 1.73/1000 = 3-phase KW
460 x 427.42 x .65 x 1.73/1000 = 221.07 KWH
460 x 369.10 x .74 x 1.73/1000 = - 217.36 KWH
Kilowatt Hours savings 3.71 KWH
3.71
KWH x 8766 hours per year = 32,522 KWH annual savings.
At
$.07 per KWH, we show an annual energy savings
of $2,276.54 on this one piece of equipment!