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
The fan I was using:
http://www.frozencpu.com/products/7356/fan-436/Sunon_40mm_x_20mm_Fan_KD1204PKB2.html#blank
This fan got very loud after 5 years of near continuous use, it still works, it just sounds like it is struggling.
Right now I am using the following fan. I am not sure what electronic device it was salvaged from or how old it is, but it too sounds like it is struggling. My DMM says it pulls 0.07a.
http://www.cwc-group.com/afb0412ma.html
This is the fan I plan on getting. It is the lowest wattage fan I can find.
http://www.frozencpu.com/products/17240/fan-1070/Sunon_MagLev-Vapo_40mm_x_20mm_Fan_w_TAC_Sensor_Wire_-_KDE1204PKV3MSARGN.html?tl=g36c15s560
The fans themselves create some heat which must then be removed and probably accounts for the increase in amp consumption. I don't think anything more than 5 CFM is necessary inside a small fridge.
A 24 volt fan running on 12 volts could be a good option too. I have one 80mm fan, 24v rated at 0.15a that draws 0.05a on 12 volts and is pretty much silent. The CFM is more than needed. Not as many options exist for 24v fans.
I've found that area inside the box, under where the cooling unit resides is a few degrees warmer than the rest of the box, but is much warmer, by 7 to 8 degrees without the fan, and 3 to 4 warmer with the fan.
I am going to experiment with internal fan locations outside the freezer, it for now is just the most convenient location.
While the 120mm fan which came with my Vitrifrigo is rated at 0.24 amps, I found out it only draws that initially, and after getting up to speed draws only 0.11a. So the amp savings with the Noctua Fan are not as drastic as I once thought.
Your photos appear as if your Tundra has a 92 mm fan mounted diagonally across the condenser. Is this so? Can you read the part numbers/specs on it?
I have reports from 1 other 1.8 cubic foot Vitrifrigo owner saying he has a 120mm fan rated at ~72 cfm. 2 reports of Truckfridge 2.2 cubic foot models using 92 mm fans rated at 38 and 42 cfm.
My Noctua NF-F12 fan came with a low noise adapter which is just an inline resistor and drops the cfm to ~43. It is basically silent with it on, but I have not tested duty cycle at 43cfm. The 54 CFM whooshing sound is not really irritating. The Noctua fan has a much higher static pressure rating compared to other fans which have higher cfm ratings, so it is good for pushing air into a restriction.
I really wish all the fan's ratings were more universally measured, and specified.
http://www.frozencpu.com/products/7356/fan-436/Sunon_40mm_x_20mm_Fan_KD1204PKB2.html#blank
This fan got very loud after 5 years of near continuous use, it still works, it just sounds like it is struggling.
Right now I am using the following fan. I am not sure what electronic device it was salvaged from or how old it is, but it too sounds like it is struggling. My DMM says it pulls 0.07a.
http://www.cwc-group.com/afb0412ma.html
This is the fan I plan on getting. It is the lowest wattage fan I can find.
http://www.frozencpu.com/products/17240/fan-1070/Sunon_MagLev-Vapo_40mm_x_20mm_Fan_w_TAC_Sensor_Wire_-_KDE1204PKV3MSARGN.html?tl=g36c15s560
The fans themselves create some heat which must then be removed and probably accounts for the increase in amp consumption. I don't think anything more than 5 CFM is necessary inside a small fridge.
A 24 volt fan running on 12 volts could be a good option too. I have one 80mm fan, 24v rated at 0.15a that draws 0.05a on 12 volts and is pretty much silent. The CFM is more than needed. Not as many options exist for 24v fans.
I've found that area inside the box, under where the cooling unit resides is a few degrees warmer than the rest of the box, but is much warmer, by 7 to 8 degrees without the fan, and 3 to 4 warmer with the fan.
I am going to experiment with internal fan locations outside the freezer, it for now is just the most convenient location.
While the 120mm fan which came with my Vitrifrigo is rated at 0.24 amps, I found out it only draws that initially, and after getting up to speed draws only 0.11a. So the amp savings with the Noctua Fan are not as drastic as I once thought.
Your photos appear as if your Tundra has a 92 mm fan mounted diagonally across the condenser. Is this so? Can you read the part numbers/specs on it?
I have reports from 1 other 1.8 cubic foot Vitrifrigo owner saying he has a 120mm fan rated at ~72 cfm. 2 reports of Truckfridge 2.2 cubic foot models using 92 mm fans rated at 38 and 42 cfm.
My Noctua NF-F12 fan came with a low noise adapter which is just an inline resistor and drops the cfm to ~43. It is basically silent with it on, but I have not tested duty cycle at 43cfm. The 54 CFM whooshing sound is not really irritating. The Noctua fan has a much higher static pressure rating compared to other fans which have higher cfm ratings, so it is good for pushing air into a restriction.
I really wish all the fan's ratings were more universally measured, and specified.
