whether an ice can be made without the use of electricity? if it is then how? (I mean to say whether 200 years back when electicity or any refrig. were not there How ice would have been made?)
Ice back then was actually imported from Alaska. No joke.
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raprap
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Thu 24 May, 2007 12:08 am
The Romans used evaporative cooling to make ices, a frozen concoction similar to ice cream. They would reap thin ice sheets off of large shallow ponds that were exposed to the dry night air in desert areas. During the day, they'd cover the ponds to prevent excessive solar heating.
In olden days in the winter ice cutting and storage was used. They'd cut large blocks of ice in the winter and store them packed in sawdust in "ice houses".
After the discovery of heat cycles (the middle to late 19th century) mechanical power would be used directly to provide the energy required by compressors, that usually used ammonia as the working fluid.
Today, non electric refrigeration cycles use absorption heat commonly called the Electrolux cycle that exploits the partial pressure of hydrogen over ammonia in a thermosyphon to provide refrigeration and consequently ice production.
Rap
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vinsan
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Thu 24 May, 2007 05:54 am
Yes evaporation can make ice.
In India , Moghuls used to get ice from himalayas and use extreme levels of evaporation to keep them frozen for days.
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DrewDad
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Thu 24 May, 2007 06:53 am
Re: it may be physics
udayan wrote:
whether an ice can be made without the use of electricity? if it is then how? (I mean to say whether 200 years back when electicity or any refrig. were not there How ice would have been made?)
Not 200 years ago, but refridgerators used to run off of gas.
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ebrown p
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Thu 24 May, 2007 07:12 am
There is no reason you couldn't have a hand-cranked refridgerator. All you need is to run a pump to circulate the refrigerant through the condenser and evaporator and perhaps run a fan.
All of the things that happen in a refrigerator can easily be done without electricity.
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DrewDad
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Thu 24 May, 2007 08:16 am
ebrown_p wrote:
All of the things that happen in a refrigerator can easily be done without electricity.
What about the light? Huh? Huh? Where's your God now?
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NickFun
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Thu 24 May, 2007 08:22 am
DrewDad has an excellent point.
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Pauligirl
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Thu 24 May, 2007 06:42 pm
DrewDad wrote:
ebrown_p wrote:
All of the things that happen in a refrigerator can easily be done without electricity.
What about the light? Huh? Huh? Where's your God now?
When you close the door, does the light stay on?
P
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raprap
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Thu 24 May, 2007 07:10 pm
with a gas refrigerator you can use a gas lamp.
Rap
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NickFun
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Thu 24 May, 2007 11:56 pm
ebrown_p wrote:
There is no reason you couldn't have a hand-cranked refridgerator. All you need is to run a pump to circulate the refrigerant through the condenser and evaporator and perhaps run a fan.
All of the things that happen in a refrigerator can easily be done without electricity.
Um...wouldn't you have to stand there all day turning that crank?
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ebrown p
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Fri 25 May, 2007 01:11 pm
NickFun wrote:
ebrown_p wrote:
There is no reason you couldn't have a hand-cranked refridgerator. All you need is to run a pump to circulate the refrigerant through the condenser and evaporator and perhaps run a fan.
All of the things that happen in a refrigerator can easily be done without electricity.
Um...wouldn't you have to stand there all day turning that crank?
Um... yeah. And your point is?
I was just answering the question.
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akaMechsmith
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Sat 26 May, 2007 07:00 pm
On E-Bay today there was for sale a manual explaining the workings and repair of gas absorption refrigeraters.
Also Dometic Manufacturing Co. manufactures gas refrigerators for household and RV use in New Brunswick Canada.
Our Old Amish community that eschews electricity uses them with their Gods blessing.
Just think, a flame outside makes cold inside. Miraculous
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