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coldoc
26-02-2014, 08:38 AM
Hello,

Does the temperature of the hot side of an air conditioner (AC) effect the temperature of the evaporator?

I imagine putting the hot side of a 5,000 btu AC in a fluid filled insulated container of sorts with the cold side of a 10,000 btu AC, would this, making the hot side of the 5,000 btu AC very cold, make the cold side of the 5,000 btu AC run much colder?

The goal isn't to produce just a lot of cold, but a really low temperature of at least -80c.

mikeref
26-02-2014, 09:44 AM
Answer to Q1. Yes. There is more to it though.
Answer to Q2. Basically NO.
Air-conditioners aren't designed for low temperature work. They are meant for comfort cooling/ heating in the range or +18 C to + 30 ish C. (Room temperature.)
- 80 Degrees C requirements is a completely different ball game. More equipment and lots of money.

install monkey
26-02-2014, 07:26 PM
search for cascade system- 2 stage req for -80 air temp, using r290.r600 not the sort of thing you can knock up in a shed

The MG Pony
22-03-2014, 04:56 PM
A simple auto caskade can be made with a 6500 btu air con and some 60 feet of copper.

http://www.xtremesystems.org/forums/showthread.php?277787-CryoBUG-is-Back

http://www.xtremesystems.org/forums/showthread.php?144007-Morphing-Air-Conditioner-into-Autocascade-System

it is easier, but same time in a snese harder, so take your pick of the poisen, nothing in life is as simple as you have preposed lol.

The MG Pony
22-03-2014, 05:08 PM
search for cascade system- 2 stage req for -80 air temp, using r290.r600 not the sort of thing you can knock up in a shed

I disagree good sir, depends on your shed! ;)