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Posted by hvacrmedic on June 6, 2007, 6:02 pm
> >I'm thinking about using an air compressor to take warm air and
> >compress it to raise the temperature in order to heat up a water tank.
> >Once some of the heat has been removed I would intend expanding the
> >air before reheating in the same way as you would in a heat pump.
>
> >I have a couple of questions which I would appreciate some views on:-
>
> >1). Do systems exist as described above. If yes where can I get more
> >information, if not why not?
>
> >2). I calculate the energy required to compress the air is the same as
> >what would be required using conventional heating. If I expand the air
> >in a piston / cylinder I should be able to recover some energy.
> >However if I expand using a nozzle I cannot see where I can recover
> >some of the energy used to compress the air. Can anybody explain
> >what's going on here?
>
> >3). I'm unclear regarding the merits of either compressing the warm
> >air removing the heat and then releasing to atmosphere compared with
> >completing the cycle.
>
> >I studied thermodynamics some years ago but need to get some
> >understanding of the basics involved here.
>
> >Any thoughts / help welcome.
>
> >Thanks
> >Numtyhead
>
> Such design was used in the late 1800's aboard Sailing Steam Ships
> (SSS Minnow /eg). The compressed air was used to refrigerate cargo.
> Inefficient then, I doubt any advantage is to be gained today over a
> similar concept using conventional heat pump application.
> Be aware the engineering part of the water heating has to be precise.
Is that supposed to mean something? Maybe you could expand a bit on
that statement. I'm not sure that the expression "the water heating
has to be precise" even means anything in English.
>
> ICE- Hide quoted text -
>
> - Show quoted text -
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