|
|
Post by andrewo on Jul 2, 2021 7:02:38 GMT
I was just curious if general electric made any monitor tops that were designed to run at freezer temperatures.
|
|
|
|
Post by ckfan on Jul 2, 2021 22:33:15 GMT
Sort of. I’ve seen one and I know the person who has it. It was really designed to be used as an ice maker and not a freezer. Although it would get down to “freezing” temps but not as cold as a modern freezer. It was the DRF4 and was intended for restaurant use.
Oh, and I think I saw a picture of a prototype DR type monitor top that had a tiny freezer section and not just a normal evaporator.
|
|
|
|
Post by turbokinetic on Jul 2, 2021 22:48:54 GMT
I was just curious if general electric made any monitor tops that were designed to run at freezer temperatures. The issue is the temperature-pressure curve of SO2. It would operate in a very high vacuum to run at freezer temperatures. It only has to go down to 25 degrees or so, to make ice cubes from fresh water. But to store frozen foods, it has to be a lot colder. The compressor would have to run in a very high vacuum to do that. Frigidaire has an SO2 system called the MultiCold which does have a frozen section. It used an open-drive compressor which is happy running in a very high vacuum condition. It doesn't depend on the return gas to cool the motor. Travis has the only known example of a complete MultiCold system; as far as I know. You could replace the SO2 in a CK type compressor system with R152A and allow for colder temperatures, but the cabinet would need to be small enough to work with a 1/8 HP compressor. So it would be a very minimal freezer. Something like the 50's Frigidaire "Super Freezer Chest" evaporator could be installed in a Monitor Top and used with a higher pressure refrigerant. Sincerely, David |
|
|
|
Post by andrewo on Jul 5, 2021 2:38:10 GMT
Thats really interesting information! I never thought about the effects of different types of refrigerant and such.
|
|
