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Posted by Stormin Mormon on March 1, 2008, 8:48 am
A pre chiller for the input water is an excellent idea.The wise guys on this
list aren't likely to be much help. It sounds like you have an idea how much
BTU you have to move. Now, the challenge is to find a refrigeration tech who
can build one for you. It occurs to me that a window air conditioner has a
lot of the parts you'd need. Compressor, condensor, fans, etc. It would need
a coaxial evaporator, to run the water through the cold freon vapor. But,
that might be possible to make a one of a kind prechiller for you.
--
Christopher A. Young
Learn more about Jesus
www.lds.org
.
Our ice machine produces what we need 48 or 49 weeks per year.
If I could just get a little more out of it when its so hot I would not have
to concern myself with purchasing, transporting and storing ice
those few weeks a year.
Still hopeful,
Mike
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Posted by amdx on March 1, 2008, 10:41 am
>A pre chiller for the input water is an excellent idea.The wise guys on
>this
> list aren't likely to be much help. It sounds like you have an idea how
> much
> BTU you have to move. Now, the challenge is to find a refrigeration tech
> who
> can build one for you. It occurs to me that a window air conditioner has a
> lot of the parts you'd need. Compressor, condensor, fans, etc. It would
> need
> a coaxial evaporator, to run the water through the cold freon vapor. But,
> that might be possible to make a one of a kind prechiller for you.
>
Interesting, one of those 5000 btu air conditioners would be more than
enough.
I guessing a rating of 5000 btu means 5000 btu per hour? I just need an
efficient
way to transfer the heat. I may have trouble scrounging a coaxial
evaporator.
Thanks, Stormin.
Mike
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Posted by Stormin Mormon on March 1, 2008, 8:31 pm
Yes, window or wall AC are rated in BTU per hour. Coaxial condensors are
harder to find, of course.
--
Christopher A. Young
Learn more about Jesus
www.lds.org
.
It occurs to me that a window air conditioner has a
> lot of the parts you'd need. Compressor, condensor, fans, etc. It would
> need
> a coaxial evaporator, to run the water through the cold freon vapor. But,
> that might be possible to make a one of a kind prechiller for you.
>
Interesting, one of those 5000 btu air conditioners would be more than
enough.
I guessing a rating of 5000 btu means 5000 btu per hour? I just need an
efficient
way to transfer the heat. I may have trouble scrounging a coaxial
evaporator.
Thanks, Stormin.
Mike
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Posted by Stormin Mormon on March 1, 2008, 8:33 pm
Hey, wait up a minute. I'm the guy on this list who says "clean the
condensor" for everything. Bubba says thermostat, and I consider unprintable
what Milligan says. Noon Air says to call a "competent" professional. Marc,
what's your trade mark expression?
--
Christopher A. Young
Learn more about Jesus
www.lds.org
.
Also, a good regular clean and polish of the condenser coil, fins and
fan would be a very good start. Head pressure increases at a rate far
higher than saturated condensing temperature. The effects on
compressor volumetric efficiency loss and liquid temperature
(enthalpy) are very high in relation to the slightest increases in
saturated condensing temperature.
How to actually reduce head pressure in the summer? Atomised adiabatic
with distilled water? Throw another fan in on the front of the
condenser to increase air flow rates. Reduce ice melt rate - keep it
cooler after harvests.
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Posted by Stormin Mormon on February 29, 2008, 10:17 pm
A BTU is the ability to change one pound of water one degree farenheit. Now,
you have the data needed to figure out the BTU/h needed.
--
Christopher A. Young
Learn more about Jesus
www.lds.org
.
I have an ice machine that produces about 450 lbs per 24 hrs.
In the winter!
I live in Florida, in the summer the inlet water temperature can be close
to 90*.
I want to prechill the water to maybe 40*. The machine will need about 1
gallon every 15 minutes.
I'd like to use a small refrigerator to chill the water.
I have a few details to work out, such as it takes 252 ft of 5/16"
tubing to hold 1 gallon of water. (not practical)
The refrigerator I'm looking at says 256 btu/hr.
My question, how many btu does it take to reduce the temperature
of 1 gallon of water from 90* to 40* in 15 minutes.
Thanks, Mike
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