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Old May 28th 04, 09:32 PM posted to alt.sci.physics,sci.geo.meteorology
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Default outdoor icemaking ???

Hello,

Some time ago I heard a story that there is a technique to make ice outdoor
(in the (sub)tropics), and that this technique has the name something like
"Bengal Ice Making".

I'm very interested in this technique/phenomenon, but no matter how I search
with google, I can't find anything.

Has anyone heard about this technique? And if so: Can someone please give me
some interesting links regarding this outdoor ice making??

thanks in advance,

martin



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Old May 28th 04, 11:24 PM posted to alt.sci.physics,sci.geo.meteorology
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Default outdoor icemaking ???

Dear martin:

"martin" wrote in message
...
Hello,

Some time ago I heard a story that there is a technique to make ice

outdoor
(in the (sub)tropics), and that this technique has the name something

like
"Bengal Ice Making".

I'm very interested in this technique/phenomenon, but no matter how I

search
with google, I can't find anything.

Has anyone heard about this technique? And if so: Can someone please give

me
some interesting links regarding this outdoor ice making??


Are you referring to refrigeration using a flame as a "compressor" (used in
some mobile homes), or to the method the Iraqis (?) used to use for cooling
their public buildings (which anecdotally produced ice sheets) using
subterranean tunnels and evaporative cooling?

David A. Smith


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Old May 29th 04, 07:18 AM posted to alt.sci.physics,sci.geo.meteorology
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First recorded activity by Weather-Banter: May 2004
Posts: 3
Default outdoor icemaking ???

Dear David,

The technique I heard about is that you have a large shallow open box
(plastic/steel?) with a layer of shallow water in it. You place it on some
packages of hay (or on foam plastic) in order to avoid bottom heat fluxes,
and expose the water to the midnight clear sky. The temperature of the water
should drop considerably, and might even freeze

It was said that this is "Bengal ice making" or something like that.

Does this ring a bell by someone???

kind regards,
martin

"N:dlzc D:aol T:com (dlzc)" N: dlzc1 D:cox schreef in
bericht news:[email protected]
Dear martin:

"martin" wrote in message
...
Hello,

Some time ago I heard a story that there is a technique to make ice

outdoor
(in the (sub)tropics), and that this technique has the name something

like
"Bengal Ice Making".

I'm very interested in this technique/phenomenon, but no matter how I

search
with google, I can't find anything.

Has anyone heard about this technique? And if so: Can someone please

give
me
some interesting links regarding this outdoor ice making??


Are you referring to refrigeration using a flame as a "compressor" (used

in
some mobile homes), or to the method the Iraqis (?) used to use for

cooling
their public buildings (which anecdotally produced ice sheets) using
subterranean tunnels and evaporative cooling?

David A. Smith




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Old May 29th 04, 01:53 PM posted to alt.sci.physics,sci.geo.meteorology
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First recorded activity by Weather-Banter: May 2004
Posts: 5
Default outdoor icemaking ???

Dear martin:

"martin" wrote in message
...
Dear David,

The technique I heard about is that you have a large shallow open box
(plastic/steel?) with a layer of shallow water in it. You place it on

some
packages of hay (or on foam plastic) in order to avoid bottom heat

fluxes,
and expose the water to the midnight clear sky. The temperature of the

water
should drop considerably, and might even freeze

It was said that this is "Bengal ice making" or something like that.

Does this ring a bell by someone???


This could work in the desert, when there is no breeze, and when the sky is
very clear. The depths of space are *very* cold, and when there are no
water droplets or soot to reradiate heat back to the ground, heat radiates
(essentially) only out into space. It is similar to why dew forms on
grass.

Don't try and cover the pan with plastic, and don't make the water too
deep... an 1/8" or so. Its worse than watching water boil though...

URL:http://www.mathcad.com/library/Libra...nightfrost.htm

But I don't find a term in common usage, such as you seem to partially
recall. Sorry.

David A. Smith




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