Solar Power For A/C
jolly
http://www.techespot.com/2009/08/solar-power-for-ac.html
hhc314
> Solar Power For A/Chttp://www.techespot.com/2009/08/solar-power-for-ac.html
Just to cut to the chase, realize that 1-ton of airconditioning
requires a compressor consuming 746 Watts of electricity. If you have
a 3-ton central system, triple that figure.
Does anyone here have even a clue as to how much area a solar array
providing this much electrial energy would consume on a hazy day?
No, I didn't think so.
The wonderful thing about well meaning fantasy is that you never worry
about the ramifications of your dreams, and worry only about the
desired imaginative results.
In our gentle, politically correct world we call these people mentally
impaired, or (less politically correct, retarded). The really tragic
thing is that they actually get to vote. (Our current administration
is witness to this.)
Harry C.
DanB
> On Nov 25, 1:40 am, jolly <freedatingsi...@gmail.com> wrote:
>> Solar Power For A/Chttp://www.techespot.com/2009/08/solar-power-for-ac.html
>
Errr. You can't do that if you don't know what they are talking about.
That link is a spam portal. But it does lead to a test project with, now
listen. Solar thermal concentrators driving an absorption chiller.
Look Ma, no electricity in the working loop!
hhc314
Dan, without the design particulars this thing sound very much like
was in conventally called a "Swamp Chiller". It employs evaporative
cooling but is largely now obsolete.
Effective refrigeration requires moving heat from a cooler place to a
warmer, be it a refrigerator, heat pump, or air conditioner.
Thermodynamics requires that energy be input to do the job, and that
is most effectively persormed by electricity in reasonably large
quantities.
This is not to say that other sources of energy cannot be used to
provide generation. A gas flame, for an example, such as with the
Servel-Electrolux gas flame operated refrigerator of the 1930s. Of
course any other source of continuous energy could be employed,
possibly even solar although I've never seen this done with any
notable result.
Never lose sight of the thermodynamics which tells us (as quoted from
Sears and Zemansky page 350): "It is impossible to construct a
refrigerator that operating in a cycle, WILL PRODUCE NO EFFECT other
than the transfer of heat from a cooler to hotter body".
Actually the Servel Gas Fired Refrigerator operated, but not well
enough to compete with electric motor powered refrigeration
compressors, hence the electric refrigerators and air conditioners
dominate today's marketplace and the gas powered refrigerator has
become little more that a historic curiosity.
Harry C.
DanB
> On Nov 25, 3:00 pm, DanB <a...@some.net> wrote:
>> hhc314 wrote:
>>> On Nov 25, 1:40 am, jolly <freedatingsi...@gmail.com> wrote:
>>>> Solar Power For A/Chttp://www.techespot.com/2009/08/solar-power-for-ac.html
>>> Just to cut to the chase....
>> Errr. You can't do that if you don't know what they are talking about.
>> That link is a spam portal. But it does lead to a test project with, now
>> listen. Solar thermal concentrators driving an absorption chiller.
>>
>> Look Ma, no electricity in the working loop!
>
> Dan, without the design particulars this thing sound very much like
> was in conventally called a "Swamp Chiller". It employs evaporative
> cooling but is largely now obsolete.
Chillers are still widely used because of the cost effectiveness. But
the common or 'swamp' chiller does not use a heat source.
See the full article
<Adsorption chillers>
<http://en.wikipedia.org/wiki/Absorption_refrigerator>
> Effective refrigeration requires moving heat from a cooler place to a
> warmer, be it a refrigerator, heat pump, or air conditioner.
I'd say you have to do that to call it refrigeration at all.
> Thermodynamics requires that energy be input to do the job, and that
> is most effectively persormed by electricity in reasonably large
> quantities.
We just got back from a short camping trip. We have a Dometic in the
trailer. It works just fine without an 'electric' pump.
> This is not to say that other sources of energy cannot be used to
> provide generation. A gas flame, for an example, such as with the
> Servel-Electrolux gas flame operated refrigerator of the 1930s. Of
> course any other source of continuous energy could be employed,
> possibly even solar although I've never seen this done with any
> notable result.
Ok, lets cut to the apples and oranges. I haven't seen their numbers but
apparently you have not either.
Electric solar panels and infrastructure may run some $12, $15, $20 an
equivalent watt? I don't know, but probably in the ball park. Also at
18% conversion at the panels, some 6 or 7 times the size of heat
equivalent infrastructure.
It looks like the 'electric' method could be loosing in a big way
compared to an absorption system.
> Never lose sight of the thermodynamics which tells us (as quoted from
> Sears and Zemansky page 350): "It is impossible to construct a
> refrigerator that operating in a cycle, WILL PRODUCE NO EFFECT other
> than the transfer of heat from a cooler to hotter body".
Whatever that was suppose to mean...
> Actually the Servel Gas Fired Refrigerator operated, but not well
> enough to compete with electric motor powered refrigeration
> compressors, hence the electric refrigerators and air conditioners
> dominate today's marketplace and the gas powered refrigerator has
> become little more that a historic curiosity.
I guess you missed the point. The input is lower grade heat, not
electricity. Just because it is your opinion that absorption
refrigeration is a curiosity, does not make it so.
This may be a viable and economical system, I don't know. You have not
crunched their numbers so you are just waving your hands about.
After all, you did not even know what the system was from your first
post. Since when are numbers crunched and science done 'from a feeling'?
You should walk the talk....