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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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Jan 18 2012, 00:15 -To- Jan 19 2012, 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 |
8.0 |
151.0 |
| Experimental Lights |
8.0 |
154.0 |
| Experiment Fans |
0.0 |
0.0 |
Building Conditions |
Avg |
Min/Max |
| Experiment Roof Surface |
67.1 |
46.6/ 97.2 |
| Control Roof Surface |
68.0 |
46.4/ 101.1 |
| Experiment Attic Temp. |
66.0 |
51.7/ 82.3 |
| Control Attic Temp |
66.6 |
54.2/ 79.6 |
| Experiment Room Temp. |
69.5 |
65.4/ 73.1 |
| Control Room Temp. |
69.0 |
65.4/ 72.1 |
| Experiment Room RH |
58.6 |
55.6/ 60.5 |
| Control Room RH |
53.6 |
50.5/ 57.9 |
Weather Conditions |
Avg |
Min/Max |
| Ambient Temp (F) |
66.0 |
55.1/ 77.1 |
| Ambient RH (%) |
2.3 |
1.6/ 2.8 |
| Solar (w/m2) |
133.9 |
0.0/ 605.8 |
| Dewpoint (F) |
-92.9 |
-98.4/ -89.4 |
| Sky Temp (F) |
50.1 |
34.2/ 63.2 |
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