HVAC 2.0 Diaries
From Green Garage Detroit
Sept 22 2011
- Solar Thermal Collectors (@ 6:20am)
- P9 went off last night
- Array Out = 73F
- Tank 1 = 91F (Passed 90F!!!)
- BTU Production
- Weekly
- This is 880,000 BTU's in a week.
- This is 314 BTU/sf/day...which is on the low side.
- Daily (Today)
- Partially Sunny day: 7F tank rise * 4800gal * 8.33lbs/gal / 400 sf = 700 BTU/sf/day <<== planned 750BTU/sf/day
- Weekly
- Air Core = 49F
- Ventilation
- Booster fan was on all night- this is in mode 7 which calls for dehumidification
- ERV was off last night
- Altherma shows On? Trying to dehumidify. unit was off do to low water pressure.
- 10:43 AM solar panels start- air temp-58, panel air temp 120, tank temp 90.9
Sept 21 2011
- Solar (Lunar) Thermal Collectors
- Ran all night!!
- Tank 1 = 84F
- Array Out = 88F?
- Ventilation
- Dehumidification was on most of the day
- It produced water in the drain line!!
- Graphing Indoor RH showed it was slowly going down.
- Some risk this it cant' keep up with very high humidity (91%RH today!)
- Dehumidification was on most of the day
- Earth Room
- Looks like Earth room hits 90F within 30 minutes of running
- Issue with the exhaust fan turning on and off rapidly because it turns on at 90F and turns off at 89F.
- Not providing value because outdoor temp is 70F and earth room gets to 90F within 30 minutes.
- Opportunity to do some "thermal pumping" in the shoulder seasons...heating 30 mins, cooling (dehumid) 30 mins, cycles.
