Time to replace defective and potentially dangerous absorption fridge

[cmillsap]

Generally heat transfer increases with velocity. This is definitely true for the case of natural or forced (with a fan) convection of air on a heat exchanger.
[/quote]


I believe that's to a point. Beyond that point, you're moving the air too fast to get adequate transfer. I know that is the case with a radiator in a vehicle. Move the water too fast through it and it will overheat. You need at least a restrictor plate in the thermostat housing, in place of the thermostat, to prevent such a condition.

.


Now, do two 4" fans move too much air? I don't know, but I would at least be suspect, especially when placed right at the inferior edge of the coils.


jm02. Carry on!
[/quote]

John,

There is such a condition called Laminar Flow. That is when a liquid or air is allowed to move in a linear fashion with no baffles or restrictions to create turbulence in the flow. High flow velocity in certain situations sometimes contributes to Laminar flow. Laminar flowing liquid or air does a poor job of transferring heat by convection. Baffles are usually placed into the Laminar flow stream to produce turbulence, thereby increasing the rate of heat transfer.

However, I doubt a Laminar flow condition would be possible passing throught the fridge coils.