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Thread: Refrigerant vs Chilled Water
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15-01-2004, 11:56 AM #1
Refrigerant vs Chilled Water
I am building a system using an automotive ceiling mount evaporator rated at 22000 BTU, but I want to use chilled water instead of R134a.
Besides making sure that the water has the appropriate corrosion inhibitors, are there any other gotchas that I should be aware of?
Mark Baker
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15-01-2004, 01:30 PM #2
If the given capacity was rated at -10°C (i assume this) then your water/glycol must alos have +/- -10°C. Otherwise you won't reach your 22000 BTU.
Remove eventually the distributor and make sure you fit the correct pump.It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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15-01-2004, 04:46 PM #3
hi baker,
looks like a bad idea to me. water coils have a different design.
consult Marc O'Brien. I'm sure he can help you with it.
chemi
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15-01-2004, 11:52 PM #4
Just to clarify, I am using water because the unit will be in a sleeper cab and I don't want to risk smothering the occupant should the evaporator spring a leak.
The compressor is only rated at 7600 BTU/H, and the evaporator was selected for size and availability, rather than capacity.Mark Baker
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16-01-2004, 02:17 PM #5
ok baker,
its about 1HP now you will need a condensing unit with some sort of gas/ water heat exchanger, I would have use a welded plate one, a water pump, magnetic will never leak! and a small expention tank.
all of that should be desiged as small as possible with all the necessary protections for both circuits, water and gas, and find a good tech. to build it for you.
good luck
chemi
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