arizonaguide
New Member
Good points, Oznog.
I was thinking much simpler heat recovery than capturing the heat directly from the fluid.
I was considering capturing heat from the hot air that's vented from the top of the outside coil of the heat pump. In other words, there's a huge fan motor outside that cools the outside (condenser) coil. That resulting hot air, could very easily be passed (with same fan) immediatly through another added exchange coil full of water from the domestic hot water tank...especially if it was closeby and was part of a single unit. That would not change the engineering of the basic AirCond system, yet would recover (some) of the hot air that is currently just being vented to the Arizona sky. As with most AirCond systems here, the heat is just exchanged and vented outside with a "heat pump" system.
As far as the attic is concerned, the attic actually is non insulated, and the insulation sits on the attic floor and insulates the "ceiling" of the house...a "hot attic" if you will.
So, the solar gain in the hot attic (from dark roof shingles, etc), raises the temperature inside the attic to around 170degF during the hot part of the day! So, I could (literally) just place a 50gal tank in the attic, and have it raised to 170deg without any fancy "collectors" or anything!!! Not that I will do this, but it's just my point that excess heat is not a shortage here in the summer!
I do plan (instead) to build an actual "collector" system, and at least get solar hot water heating accomplished this year!
In fact my project(s) THIS summer is to vent that attic better, and paint the roof with some reflective coating, and at least attempt to cool it to "normal" (105-115 in July!) outside ambient air temperature...and then build an OUTSIDE solar collector to heat (supliment) my hot water.
I was just wishing that I could use some of that tremendous amount of Solar Power (here) and excess heat to develop energy to actually do some cooling!
But, the only realistic system it seems, would be to use it with a "focused mirror" to develop steam for a turbine generator...and that's not in MY budget.
That would be at least as expensive as a continuous supply of Photovoltaics/batteries!
I was thinking much simpler heat recovery than capturing the heat directly from the fluid.
I was considering capturing heat from the hot air that's vented from the top of the outside coil of the heat pump. In other words, there's a huge fan motor outside that cools the outside (condenser) coil. That resulting hot air, could very easily be passed (with same fan) immediatly through another added exchange coil full of water from the domestic hot water tank...especially if it was closeby and was part of a single unit. That would not change the engineering of the basic AirCond system, yet would recover (some) of the hot air that is currently just being vented to the Arizona sky. As with most AirCond systems here, the heat is just exchanged and vented outside with a "heat pump" system.
As far as the attic is concerned, the attic actually is non insulated, and the insulation sits on the attic floor and insulates the "ceiling" of the house...a "hot attic" if you will.
So, the solar gain in the hot attic (from dark roof shingles, etc), raises the temperature inside the attic to around 170degF during the hot part of the day! So, I could (literally) just place a 50gal tank in the attic, and have it raised to 170deg without any fancy "collectors" or anything!!! Not that I will do this, but it's just my point that excess heat is not a shortage here in the summer!
I do plan (instead) to build an actual "collector" system, and at least get solar hot water heating accomplished this year!
In fact my project(s) THIS summer is to vent that attic better, and paint the roof with some reflective coating, and at least attempt to cool it to "normal" (105-115 in July!) outside ambient air temperature...and then build an OUTSIDE solar collector to heat (supliment) my hot water.
I was just wishing that I could use some of that tremendous amount of Solar Power (here) and excess heat to develop energy to actually do some cooling!
But, the only realistic system it seems, would be to use it with a "focused mirror" to develop steam for a turbine generator...and that's not in MY budget.
That would be at least as expensive as a continuous supply of Photovoltaics/batteries!
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