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re: frugal ac tips
3 aug 2002
wrote:
>>>>>> constantly spraying water on the condenser coil to cool it might seem
>>>>>> like a good idea...
>>>i find this whole line of reasoning to be a little silly.
>>you might look at "experimental investigation of performance of
>>a residential air conditioning system with an evaporatively cooled
>>condenser," by d.y. goswami, g.d. mathur, and s.m. kulkarni of the
>>solar energy and energy conversion laboratory, mechanical engineering
>>department, university of florida, gainesville, fl 32611, pp 206-211,
>>vol. 115, november, 1993 transactions of the asme:
>> ...system performance was monitored without and with the evaporative
>> cooler on the condenser. the data show that electric energy savings
>> of 20% can be achieved by using an evaporatively cooled air condenser.
>> the energy savings can pay for the cost associated with retrofitting
>> the condenser in as little as two years.
>so, since 1993 is a few years back, why aren't we seeing a lot of
>evaporatively cooled residential ac by now?
maybe it's simpler to bomb iraq :-)
>i suspect grant money had to be justified somehow.
i'd say it's just physics.
>if the idea of cooling condenser coils has merit, rather than focus on
>just the ac, a homeowner could make a perimeter of misting nozzles
>around the entire house and gather the benefits of evaporative cooling
>from all of the walls as well as the ac.
not easy, given winds. might work in some sort of cave.
>ultimately, better insulation and properly sized condensers are a
>simpler solution to the problem.
that's another approach.
nick
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