Increasing Airflow through Condenser.
The new DC only compressor fridge I will soon have in my possession has a 92 mm computer muffin fan pulling air through only a portion(~85%) of the ~120mm tall condenser. It then blows this warmed a...
Forum Discussion
Thanks Bob L
I am a tinkerer. Can't help it.
The cabinet in which the Fridge will reside has to be modified anyway for this fridge. It was built for the passive condenser Norcold, but as is, it will just recycle a large percentage of preheated condenser air from the Danfoss unit location.
If I reverse the fan direction and direct it's flow directly out the compartment and cut a new vent next to where the controller will reside, it will draw in fresh Air keeping the controller, and the whole compressor compartment cooler.
The larger fan idea is mostly because a well chosen larger fan can spin slower, move more air more quietly and use less electricity.
I have also found that these muffin fans do best with no restrictions directly behind or in front of the spinning blades. The smallest restriction makes them louder and significantly reduces airflow.
I could just keep the current fan where it resides, and use another fan on a snap switch to evacuate the compartment. I just think it would be more elegant for a single fan to both concentrate all it's flow through all the condenser via a shroud, and also evacuate the compartment, using slightly less electricity, possibly boosting efficiency, and reducing the noise generated.
As for adding a resistor to change compressor speeds, I doubt I'll ever mess with that.
I am a tinkerer. Can't help it.
The cabinet in which the Fridge will reside has to be modified anyway for this fridge. It was built for the passive condenser Norcold, but as is, it will just recycle a large percentage of preheated condenser air from the Danfoss unit location.
If I reverse the fan direction and direct it's flow directly out the compartment and cut a new vent next to where the controller will reside, it will draw in fresh Air keeping the controller, and the whole compressor compartment cooler.
The larger fan idea is mostly because a well chosen larger fan can spin slower, move more air more quietly and use less electricity.
I have also found that these muffin fans do best with no restrictions directly behind or in front of the spinning blades. The smallest restriction makes them louder and significantly reduces airflow.
I could just keep the current fan where it resides, and use another fan on a snap switch to evacuate the compartment. I just think it would be more elegant for a single fan to both concentrate all it's flow through all the condenser via a shroud, and also evacuate the compartment, using slightly less electricity, possibly boosting efficiency, and reducing the noise generated.
As for adding a resistor to change compressor speeds, I doubt I'll ever mess with that.
