Efficient room A/C info request [RE-wrenches]

[Matt Tritt]

Allan,

If the equipment can handle relatively high humidity, and I bet it can,
consider a swamp cooler. The only load is a small motor and a very small
water pump. They easily produce a 20 degree differential in a dry
climate - like in New Mexico f'rinstance.

Matt T

-----Original Message-----
From: Allan Sindelar [mailto:allan at positiveenergysolar.com] 
Sent: Thursday, October 30, 2003 5:11 PM
To: New wrenches posting
Subject: Efficient room A/C info request [RE-wrenches]


Fellow Wrenches:
We have been asked to provide a UPS system for a local medical billing
service company that needs uninterruptible AC power for servers, etc.
The server room measured out with a Brand meter as a constant 1.03
kw-hr/hour load. There is a window-mount air conditioner that cycles on
and off to draw heat off of this otherwise windowless room. The A/C uses
a 20A 250VAC circuit. Some cooling must be part of the UPS load.

We are looking at more efficient ways to replace this A/C. We have 1.03
kwh of constant heat being produced, plus summer ambient temps into the
90s. It has to be foolproof without needing attention; run off grid
power when it's available, and battery/inverters when not. We haven't
determined the design period of autonomy yet, but it shouldn't be
necessary for this question.

 I know nothing about air conditioners. Are there any high-efficiency
120VAC window-mount units that can maintain normal (75F) temperatures
with this load? This is not a "solve my needs at any cost" job, either:
solutions must be relatively simple and at reasonable cost, but load
reduction is always cheaper than system capacity.

Looking for advice, please.
Allan

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