|
|
|
|
This research site monitors the electrical consumption as well as the interior space conditions of a near zero energy home in Gainesville, Florida. It is a single story three bedroom/two bath home with 1519 sqft of living space and a preliminary HERS rating of 16. Energy consumption is offset by a 4.2 kw photovaltaic system. It has double pane, low e vinyl windows and a sealed attic with R-30 open cell spray foam insulation. Heating and cooling is provided by a 2 ton, open loop, geothermal heat pump. The house has all Energy Star appliances, water star plumbing fixtures, and an 80 sq. ft/120 gallon drainback solar hot water system. All solar systems are west facing and has been occupied since March 2009. Data collection began in July 2008.
|
|
|
Feb 08 2010, 00:15 -To- Feb 09 2010, 00:00 EST |
Total Electric Energy Use |
Peak kW |
kWatt-hrs |
| Total consumption |
5.9 |
27.0 |
| PV production |
2.3 |
7.6 |
| Fed back to utility |
2.1 |
5.3 |
| PV used by house |
0.9 |
2.2 |
| Net purchased electricity |
5.9 |
19.4 |
Selected Electric Energy End Use |
Peak kW |
kWatt-hrs |
| Geothermal heat pump |
1.6 |
6.2 |
| Geothermal/well pump |
1.0 |
5.3 |
| Hot water |
3.1 |
3.4 |
Indoor Conditions |
Avg |
Min/Max |
| Thermostat Temp (F) |
69.1 |
66.9/ 70.7 |
| Thermostat RH (%) |
56.8 |
52.9/ 60.3 |
Weather Conditions |
Avg/Total |
Min/Max |
| Ambient Temp (F) |
47.9 |
32.4/ 63.1 |
| Ambient RH (%) |
71.7 |
38.4/ 95.1 |
| Solar (wh/m2) |
4954.3 |
0.0/ 756.0 |
|
|
|
|