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Spray water on compressor to raise efficiency?

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Spray water on compressor to raise efficiency? BoyntonStu 09-26-2007
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Posted by on September 27, 2007, 5:00 am

>... spraying a 100 ml mist of water per second
>equals 360 Liters per hour

Evaporating that water takes 360x2.2x1000 = 792K Btu/h, like 158 5K Btu/h
window ACs :-) Or more, if the water does not provide all the cooling :-)

Nick


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Posted by Tony Hwang on September 26, 2007, 11:56 pm
ds549@webtv.net wrote:
> in grocery store we put in misters on our condensers,cut elec bill
> in half.had to clean coils twice a tear with lime remover.lucas
>
> http://www.minibite.com/america/malone.htm
>
Hmmm,
It'd be OK if distilled water is used?

Posted by Edwin Pawlowski on September 27, 2007, 10:54 am

> ds549@webtv.net wrote:
>> in grocery store we put in misters on our condensers,cut elec bill
>> in half.had to clean coils twice a tear with lime remover.lucas
>>
>> http://www.minibite.com/america/malone.htm
>>
> Hmmm,
> It'd be OK if distilled water is used?

Should be. That is similar to how the window units work with a slinger ring
to get rid of condensate.



Posted by on September 27, 2007, 11:26 am

>The average house unit in Florida is several tins ad it produces about
>1 gallon of cool condensed water per day HMMM?

Tins? :-)

>Some details please on the swamp cooler design.

Goswami used an Acme Kool Cell greenhouse evaporative cooler kit. Swamp
Thing is another brand. Stuppy Greenhouse Manufacturing sells a 10' length
of Swamp Thing pads and gutters and overhead sprinklers for $181.

Goswami cut one down to make something like a 2.5' cube surrounding
an outdoor condensing unit. You also need something like Stuppy's $268
"Plumbing completion package" which has a float valve and an adjustable
bleedoff valve (nominally 1%) to avoid mineral buildup. The idea is
to surround the condensing coil with a swamp cooler box.

>Would this idea work?
>
>Sink a 55 gallon drum into the 70* ground to cool the water and to hide it.

The ground won't help much in cooling it.

>Pipe all condensate into the drum.

Sounds good.

>Swamp cooler surrounding the condenser.

You might just trickle the mineral-free condensate and rainwater
over the coil, with no swamp cooler.

>The utilities last month were almost $700.


>The savings won,t equal the added bother.

... 0.2x700 = $140 per month? :-)

Nick


Posted by Uncle Monster on September 27, 2007, 10:54 am
> Large buildings use water to remove the heat from theur ac condensers.
>
> What about a recirculating fountain to spay the coils in my ac
> condenser for 90+ temp days.
>
> How much 'gain' in efficiency would result?

The problem is corrosion and scale buildup.
What I would do if I had a big yard would be
to use a trenching machine and bury some
3/4" polyethylene line and use the ground as
a supplementary heat sink. A flat plate heat
exchanger and glycol solution incorperated
into the AC/heat pump system would add a
lot of efficiency. Here are a few links to give
you an idea of what I'm referring to:

http://www.geokiss.com/res-design/GSHPDesignRec2.pdf

http://www.flatplate.com/?gclid=CKa8-Kzs444CFRVKUAodpzG4WQ

[8~{} Uncle Monster


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