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Fans for cooling a fridge heatsink. On a boat.

post #1 of 19
Thread Starter 
This scenario is really quite similar to cooling a TRUE or something with 1-2 120mm fans, and then adding two 120mm case exhaust fans

Alright; so I need to find fans to cool a fridge on a boat. The fridge has an internal temperature of +10 degrees centigrade at worst on really warm days, because the heat exchanger can't cool the liquid enough. As it apparently has to work extra-hard, the compressor also gets too hot to touch with bare hands.

The fridge has a single 120mm radiator with 120mm fan mount holes on both sides. Currently airflow is provided by a Silverstone (Everflow) r121225BL, which is a 1500 rpm fan. It is clearly not powerful enough.

So, what would you suggest? I've been looking at a Scythe Gentle Typhoon 3000rpm currently. Also, push vs. push/pull?

Two additional fans are also needed to exhaust hot air from the space behind the fridge where the radiator is. Cooler air is provided from the bilge, so for exhaust I'm considering two 1900rpm Scythe Slip Streams.

A fan controller will likely be installed for adjusting the fans; either my old Silverstone FP33 or perhaps something with temperature-sensors.

So, you fan fans and fan experts, what would you use?
Performance is priority #1, but the fan shouldn't be as loud as, say, a food blender (no Deltas ) since it will be running day and night. Psychoacoustics also matter, for example my old Silverstone FM121s were surprisingly pleasant (loud, but smooth and soft) at 2400rpm. Also, a louder fan is less annoying on a boat than in a PC.
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post #2 of 19
Industrial fans are probably preferred here, so for the rad fans I would use San Ace 9S1212H4011. For the exhaust, also San Ace 9S1212H4011 and put on a 7/12v switch or controller for low usage periods. The fan is rated at 40,000 hrs ( L10:Survival rate:90% at 60℃) which means it operates well in pretty extreme temps. There's also the Gentle Typhoon AP-29's, which may perform a little better for the rad but not sure how well it will hold up on a boat. It's rated at 100,000 h / 35°C or 60,000 h / 60°C.
Edited by gymenii - 8/6/11 at 12:06am
post #3 of 19
Thread Starter 
Quote:
Originally Posted by gymenii View Post
Industrial fans are probably preferred here, so for the rad fans I would use San Ace 9S1212H4011. For the exhaust, also San Ace 9S1212H4011 and put on a 7/12v switch or controller for low usage periods. The fan is rated at 40,000 hrs ( L10:Survival rate:90% at 60℃) which means it operates well in pretty extreme temps. There's also the Gentle Typhoon AP-29's, which may perform a little better for the rad but not sure how well it will hold up on a boat. It's rated at 100,000 h / 35°C or 60,000 h / 60°C.
The Gentle Typhoon AP-29 appears to be exactly the 3000RPM model

I'll have to see how well industrial fans are available, thanks for the suggestion. It's unfortunate that most computer stores at least here don't have any "hardcore industrial fans", just Nanoxias, Noctuas, Scythes, etc. The conditions shouldn't be a problem, as the old Silverstone fan has been in there for years without issues, it's just not brutal enough.
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post #4 of 19
probably the san ace ones are your best bet
   
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post #5 of 19
5500 rpm deltas? That is, if you can stand the >60db sound.
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post #6 of 19
Thread Starter 
Quote:
Originally Posted by chinesethunda View Post
probably the san ace ones are your best bet
I've seen none available around here :E I think I'm having to choose between Scythe GTs, either 3000 rpm, 4250 rpm or 5400 rpm. The fan controller and such trickery will help finding a balance between airflow and unbearable noise.

Quote:
Originally Posted by RussianJ View Post
5500 rpm deltas? That is, if you can stand the >60db sound.
Quote:
Originally Posted by Aeonus View Post
Performance is priority #1, but the fan shouldn't be as loud as, say, a food blender (no Deltas ) since it will be running day and night.
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post #7 of 19
Aren't there marine fans for this?

In any case, Sanyo Denki does make waterproof fans, some of which have high cfm's. Check here, for example. Look for 9WG- 9WP- 9WS- product numbers, like this (look down).
This
This
This
This (check out the promo price)
This
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post #8 of 19
Thread Starter 
Quote:
Originally Posted by ehume View Post
Aren't there marine fans for this?

In any case, Sanyo Denki does make waterproof fans, some of which have high cfm's. Check here, for example. Look for 9WG- 9WP- 9WS- product numbers, like this (look down).
This
This
This
This (check out the promo price)
This
I appreciate the input, but being waterproof is by no means necessary as the fan is behind the fridge in the kitchen, and should only get wet from humidity (and it is relatively dry inside the boat) or sinking. I understand that those are industrial quality fans, but 60-100 dollars for a 120mm fan is a bit much
Edited by Aeonus - 8/6/11 at 3:25pm
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post #9 of 19
Quote:
Originally Posted by Aeonus View Post
I appreciate the input, but being waterproof is by no means necessary as the fan is behind the fridge in the kitchen, and should only get wet from humidity (and it is relatively dry inside the boat) or sinking. I understand that those are industrial quality fans, but 60-100 dollars for a 120mm fan is a bit much
Heh.You must have the best boat handler I ever saw, or you stick to really peaceful ponds if your galley hasn't taken on a little water yet.

But those 38mm fans will definitely push air. And one of them is under$60.
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post #10 of 19
Quote:
Originally Posted by ehume View Post
Heh.You must have the best boat handler I ever saw, or you stick to really peaceful ponds if your galley hasn't taken on a little water yet.

But those 38mm fans will definitely push air. And one of them is under$60.
i lol'd also i forgot about those fans
   
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