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stubborn_ox 10-25-2006 07:38 PM

get ready for heat pumps
Hey, has anyone heard anything bad about these things? I keep hearing great news... I think they're the next big thing. Check this out: How To Choose and Install a Heat Pump. :eek: They make sense economically and environmentally.

mdshunk 10-25-2006 07:50 PM

The next big thing? That's funny to me. Theyv'e been installed in my area (central PA) for at least 25 years. There's probably 100,000 of them installed in my immediate market area. There's no hocus pocus to them. They work fine down to about 35* outside temps.

#CARRIERMAN 10-25-2006 09:08 PM

Hi stubborn ox

I'm with mdshunk, If you really are looking into heat pumps, get online and check them all out. If you have the money and the land the only heat pump to use is the geothermal. And for a bit of a history less: Florida Heatpump has been out since the 1960's. Heat pumps are a very viable source of heat especially when using R410A. Search the web good, you will be amazed at what you find. My enthusiasm for heat pumps is what pushed me to NATE certify in them, for the laymen that means I understand how to scrub toilets.


stubborn_ox 10-26-2006 01:59 PM

yeah, but...
isn't it a big thing that the efficiency of heat pumps has so dramatcally improved within the last year due to new federal standards? i think many more people will take a look at heat pumps now.

mdshunk 10-26-2006 09:00 PM

My enthuisam for heat pumps ends at R410a. I'm not so excited about having a bomb parked outside my house. The head pressures on that refrigerant are out of this world. This is what we have to deal with, though.

greenwar 11-08-2006 09:31 AM


Originally Posted by mdshunk (Post 22001)
My enthuisam for heat pumps ends at R410a. I'm not so excited about having a bomb parked outside my house. The head pressures on that refrigerant are out of this world. This is what we have to deal with, though.

oky, this is about d.i.y or what?
I sayd once: whay buy, and not make???
i'm building (doeing by my self) my own heat pump, ground source heat pump! and in the near future, it will be reversible!!! 200Watts eats the compressor and 1watt for fans, butane for refrigerant but i'll try, also, with air, yes, plain, compressed air, what could be more ecologic and safe but air??? direct conversion of heat , no more useless, exra, heat exchagers, short groun loop (16m or about 50feets vertical)
Nobody "d.i.y" anything anymore?<img>

#CARRIERMAN 11-08-2006 02:09 PM

Hi greenwar

Sorry to let you down, but your not the only one that has experimented with geothermal. A friend of mine had a shop that we insulated well. Then we buried 3" polypipe in the ground about 12" apart we did this in about a 50' x 30' pit. He dug it down to about 12 ft where the ground temp stayed about 55 degrees. We then used 4 old water fan coil units and installed them in the 4 corners of the building. We used 4 taco cartridge pumps to pump the water to each fan coil unit. Sense he had a backhoe service it was a no brainer to try. This system kept the building at around 74 degrees in the summer, we used a small boiler for winter heat. But I like to experiment myself, I am assuming you have some understanding of chemical temperature exchange. Would like to know how it turns out for you.

Good luck

greenwar 12-22-2006 08:42 AM

sorry? what for? :D
Dear, dear... I'm an apocalyptical-like type of guy, but that doesn't stop me to be joyfull about hearing that "I'm not alone in the universe".
I live in an area, where, my main concern is to heat the living space.
So, a DX (Direct Exchange) heat pump is the best solution for me, given the fact, that the depth of the soil (the high thermal inertia kind of, dense and wet... huh, i can't spell it in English...) is approx. 4 meters (13 feet), but , even if i should go horizontally, i went vertically, and drilled (manually, no machine involved, no gas had been burned for that drill-bit to turn) in the hard lime that lied beneath the 4 meters.
Rock, has less thermal conductivity and less inertia, so i had to drill deeper.
The compressed air, heat pump, failed, at least for me, because of the much higher pressures involved, and the two step compressor needed for air liquification or vapor saturation. I'm sure that it would be much more "powerfull", but with out a compressor big enough, I'll stick with, ozone friendly, butane.
It's easy to compress and safe enough( regarding the explosion risk)
The first few tests. revealed that i need a slightly better butane-ground thermal contact, I'll do it with, vertical, copper sheets, welded on the ground pipes like fins on a radiator.
Also, it might be powered with additional solar power, as a solar heater is under construction, or even go completely self-sustained with solar photovoltaic cells and solar heater!
I had some time to learn about the physics involved in heat transfer and fluid mechanics, I'm an experienced electronist, with a passion for physics, and ecology, ameing for total (101%) energetic autonomy, so, i hope that nobody else starts to compress butane at 20+ bar, without the necessary knowledge, skills and experience in the hazards involved in using highly compressed, highly flamable gases, so, very, near to spark sources, as compressro's relays or mains switches, not to mention how hot that butane gets, in the condensor's coils!
Finally, i hope to finish the complete instalation of the heat pump in my house, sometime this year or at the beginning af the next.
After that, i will try to put some schematics of the electronics involved, plans of the pump and photos of the installed pump next by the ruthless thermometer, all in one place for the willings, the "numbers" will decide if i will install another or more small sized pumps.
Sorry for those spelling issues, but.. spellcheckers might not be perfect.<img>

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