Re: [Phys-l] Another try

["Cliff Parker" <cparker@charter.net>]

In the early 80's I was selling HVAC control systems in the St. Louis area. 
There was a church that had a cooling system that worked this way.  A tank 
of water maybe the size of a small one car garage was chilled and I believe 
frozen by a relatively small cooling system that ran all week.  Then on 
Sunday mornings the ice was used to chill the air for the sanctuary.  For 
commercial users the demand charges on their power bill can be just as or 
even more important than the energy charges.  This system probably caused 
them to use a little more energy for their cooling (because of the thermal 
gain throughout the week) but allowed them to spread the use of that energy 
over the whole week rather than just a few hours on Sunday morning and saved 
them a nice chunk of change.

Cliff Parker


----- Original Message ----- 
From: "Jack Uretsky" <jlu@hep.anl.gov>
To: "Forum for Physics Educators" <phys-l@carnot.physics.buffalo.edu>
Sent: Monday, August 21, 2006 7:42 PM
Subject: Re: [Phys-l] Another try


> Such schemes are actually in use for cooling office buildings,
> I've been told.
>  Regards,
>  Jack
>
> On Mon, 21 Aug 2006, Bernard Cleyet wrote:
>
> > this time a physics related news article.
> >
> > THINKING OF REPLACING YOUR AIR CONDITION[ER] WITH ICE?
> >
> > HOW STUFF WORKS - How much ice would I have to store up in the winter
> > in order to air condition my house all summer?. . . This is a great
> > question... . . . It certainly would be an easy system to build. All
> > you need is a big insulated container (probably in the form of a hole
> > in the ground) with some coiled tubes at the bottom. You would run a
> > chilled water circuit from the container to a radiator inside the air
> > conditioner (see How Air Conditioners Work for details). You would
> > need a small pump to pump the water in the chilled water loop, but
> > that's it.
> >
> > [The math follows and then the conclusion]
> >
> > So we need: 130,000,000 BTU * 3.15 grams/BTU = 409,500,000 grams of
> > ice That's about 410,000 liters of ice, or 410,000 kilograms (902,000
> > pounds) of ice that you must store to cool your house all summer.
> > That's a cube measuring 740 centimeters (24.26 feet) on a side. Very
> > roughly speaking, you would have to dig a hole as big as your house
> > and insulate it well, and then in the winter you would have to shovel
> > it full of nearly a million pounds of ice. But if you do that, you can
> > cool your house for free.
> >
> > http://home.howstuffworks.com/question306.htm
> >
> >
> > bc, who hasn't checked it, because he must house, as in house husband.
> >
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>
> --
> "Trust me.  I have a lot of experience at this."
>  General Custer's unremembered message to his men,
>  just before leading them into the Little Big Horn Valley
>
>
>
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