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The Night Cool research site demonstrates an experimental building concept that uses the cool, roof decking as a heat sink for cooling. Once the attic air mass is cooled to a specific temperature, it is then circulated to the interior space to off-set internal heat gains and reduce the overall air conditioner energy use. The experiment consists of two identical, wood frame constructed buildings with differing roof systems. The control building has a white metal roof on plywood decking and a vented, R-30 batt insulated attic. The experiment also has a white metal roof however, it is fastened to steel furring strips across the rafters and no plywood decking. The attic is sealed and over an R-30 SIP ceiling.
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Mar 26 2016, 00:15 -To- Mar 27 2016, 00:00 EST |
Electric Power Use |
Peak Watt-hrs |
Watt-hrs |
Experiment AC |
0.0 |
0.0 |
Control AC |
0.0 |
0.0 |
Control Lights |
4.0 |
14.0 |
Experimental Lights |
8.0 |
39.0 |
Experiment Fans |
0.0 |
0.0 |
Building Conditions |
Avg |
Min/Max |
Experiment Roof Surface |
77.5 |
64.6/ 102.6 |
Control Roof Surface |
78.3 |
64.7/ 106.1 |
Experiment Attic Temp. |
76.8 |
66.4/ 93.6 |
Control Attic Temp |
76.9 |
68.7/ 87.6 |
Experiment Room Temp. |
76.9 |
73.6/ 80.0 |
Control Room Temp. |
75.6 |
72.6/ 78.6 |
Experiment Room RH |
57.2 |
54.2/ 60.6 |
Control Room RH |
60.6 |
58.1/ 63.1 |
Weather Conditions |
Avg |
Min/Max |
Ambient Temp (F) |
74.8 |
68.6/ 81.2 |
Ambient RH (%) |
53.1 |
12.2/ 228.9 |
Solar (w/m2) |
194.5 |
0.0/ 857.0 |
Dewpoint (F) |
40.7 |
-54.9/ 440.0 |
Sky Temp (F) |
93.6 |
86.2/ 100.6 |
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