| Author |
 Topic Search  Topic Options
|
Burton Marine 
Pet Store
Joined: March 15 2005
Location: Indonesia
Status: Offline
Points: 42
|
 Post Options
 Thanks(0)
 Quote  Reply
 Topic: No more external pump fan noise!
Posted: May 26 2006 at 12:13pm |
This is the most clever modification I've seen for external pump noise.
I took the fan off my Iwaki 70 (which is loud) and it cut the noise by 80% or more. After I get a quiet computer fan mounted, I'll see how it cools the pump. The screw/bolt holding the fan onto the drive shaft is reverse-threaded on my Iwaki. Lefty tighty, Righty loosey.
Steve
|
 |
jfinch
Guest
Joined: March 06 2003
Location: Pleasant Grove
Status: Offline
Points: 7067
|
Post Options
Thanks(0)
Quote Reply
Posted: May 26 2006 at 12:58pm |
|
|
|
|
|
Spbeyond
Guest
Joined: December 07 2005
Location: North Logan, UT
Status: Offline
Points: 1316
|
Post Options
Thanks(0)
Quote Reply
Posted: May 26 2006 at 1:37pm |
Is your pump still running? This mod looks great. Im definatly going to do it to shut up my larger pump.  Now I just need to find a good p4 heatsink, shouldn't be a problem in my basement. ;)
Edited by Spbeyond - May 27 2006 at 2:09am
|
|
90 Gallon Reef w/4 bulb 54W t5
I buy, sell and restore pinball machines. Got one in the basement? ;)
|
|
Mark Peterson
Paid Member
Joined: June 19 2002
Location: Murray
Status: Offline
Points: 21437
|
Post Options
Thanks(0)
Quote Reply
Posted: May 27 2006 at 12:07pm |
Reef central is not always the brightest place to be. If my understanding of heat transfer is of any value, that pictured heatsink is a useless piece. The fan pulls hot air away from the motor. It does no good to pull the hot air past a piece of metal. Just having the metal in the line of air movement does nothing to increase cooling, in fact, IMO it probably reduces the effeciency of the fans ability to pull hot air away from around the motor.
A heat sink must be solidly attached with a lot of contact to a heated device. It then conducts heat away from the area of greatest heat and heats the surrounding air which can be moved away for better cooling effect.
My 2 cents.
|
Reefkeeping Tips, & quick, easy setup tricks:www.utahreefs.com/forum/forum_posts.asp?TID=9244 Pay it forward - become a paid WMAS member 
|
|
jfinch
Guest
Joined: March 06 2003
Location: Pleasant Grove
Status: Offline
Points: 7067
|
Post Options
Thanks(0)
Quote Reply
Posted: May 27 2006 at 12:27pm |
You're both right and wrong Mark  . You do understand heat transfer, but I don't think you read much of the rc thread. I thought the exact same thing as you, until I read into the thread a little. He's pushing/holding the heat sink tight up against the back side of the motor (probably using a little heat transfer paste too) to draw the heat out into the fins. Works the same way the heat sink on your computer CPU works. A radial fin design would be even better...
|
|
|
|
jfinch
Guest
Joined: March 06 2003
Location: Pleasant Grove
Status: Offline
Points: 7067
|
Post Options
Thanks(0)
Quote Reply
Posted: May 27 2006 at 12:30pm |
Is your pump still running?
No, I ran it for about 6 months like that, but then switched to an Iwaki 40 and left the motor fan in place. But while I had it, it ran just fine. I had an external "clip on" type fan (quiet) that I set up to blow past it to keep it cool.
|
|
|
|
Spbeyond
Guest
Joined: December 07 2005
Location: North Logan, UT
Status: Offline
Points: 1316
|
Post Options
Thanks(0)
Quote Reply
Posted: May 27 2006 at 1:22pm |
Yeah a computers heatsink takes massive amounts of heat away. Just a fan alone would take a much smaller amount away. If the proper heatsink can be found with some good surface area the idea would pull plenty of heat away; Way more than any fan alone. A heatsink spreads the heat so it can be blown away by the fan it is very efficient (it better be or the computer you are typing on would have stoped working long ago, even with a huge fan on.) Thermal Physics.
Edited by Spbeyond - May 27 2006 at 1:26pm
|
|
90 Gallon Reef w/4 bulb 54W t5
I buy, sell and restore pinball machines. Got one in the basement? ;)
|
|
