Re: Heat Pumps...?
On Mon, 3 Feb 1997, Dwight K. Souder wrote:
> Greetings everyone! I have a question that I'm hoping some
> people may help me out with. At the high school I teach, one of the
> school tutors came to me to ask a question about air conditioning/heating
> for one of the general science students. The diagram and explanation
> they use in the book I think may not be accurate. It's kind of hard to
> explain a diagram over the internet, but I'll give it a shot.
> The diagram looks like a cut-away of a window air-conditioner.
> The description I'll try to explain is for summer cooling. From the
> compressor, the freon travels through the tubes in the back where a fan
> blows over them and the diagram show that the freon is "hot". It then
> goes through a condensor (?) and through a capillary tube. From the
> capillary tube, the tube gets larger and passes in front of the
> air-conditioner (the part inside of the house) where the freon is a gas.
> Air is circulated over the tubes and the tubes return back to the
> Personally, I think this is backwards. It was my understanding
> that the freon from the compressor is compressed into a liquid, where it
> releases its heat energy to the outside. The freon is then circulated to
> the front where it picks up heat energy and the freon goes from a liquid
> into a gas. The gas is then brought into the back and is compressed in
> the capillary tube and back into the compressor where it releases a large
> amount of heat energy.
> Can anyone help? Can anyone explain steb by step how a heat pump
> works and what goes on in an air-conditioner/heater? What happens when
> an air-conditioner is put into reverse and becomes a heater?
> Any help would be very much appreciated.
I am certainly no expert on this, but I will give it a try. The majority
of the cooling almost certainly occurs when the freon changes from a
liquid to a gas--heat of vaporization. So, when the freon goes through
some sort of nozzle and expands into a larger tube it should be inside the
house and with the inside fan blowing on the tubes and fins.
W. Barlow Newbolt 540-463-8881 (telephone)
108 Parmly Hall 540-463-8884 (fax)
Washington and Lee University email@example.com
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