Welcome!
I don't remember reading about it being done quite that way, but smaller refrigerators have been used to either hold a PC, or cool the coolant. Never seen both though.
Seems like a good idea to suppress noise.
The smaller fridges only have one cooling element (last I checked) so to have both, you'd need a large fridge. (Hum... contemplating the big 18 ft^3 standing next to me... muhaha!).
If I was you, I'd concentrate on the #Rotor dehumidifier mod (look up the member name, and go to his site).
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