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RyanJohnn
User Rank
Iron
Helpful
RyanJohnn   5/17/2013 7:36:48 AM
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It would definitely helpful and giveing great illustration.thanks

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tekochip
User Rank
Platinum
Re: Excellent!
tekochip   4/19/2013 9:23:44 AM
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I agree, you're a well-rounded engineer capable of solving problems with simple solutions even when they are outside of your discipline. I wish you worked for me, of course, we don't allow smoking in our building.


adamsmith11
User Rank
Iron
Excellent!
adamsmith11   4/19/2013 3:32:24 AM
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excellent approach. will help in making own.thanks

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OhmsLaw
User Rank
Gold
Re: The Case of the Way-Too-Hot Power Supply Unit
OhmsLaw   9/7/2011 11:48:41 PM
If you can give me a rating. TY

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Greg Stirling
User Rank
Platinum
The Case of the Way-Too-Hot Power Supply Unit
Greg Stirling   9/7/2011 5:46:57 PM
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Excellent work Rob.  Delivering 1000 units a month sounds challenging enough. This thermal problem benefitted from the application of aerodynamics.  And a clever cost effective design to follow.  Seems as though being multi-disciplinary is an asset to many machine designs...

William K.
User Rank
Platinum
Power supply cooling: the turbulent solution
William K.   9/7/2011 4:01:41 PM
Brilliant engineering indeed! The problem with laminar flow cooling is that there is always a sttagnation zone covering all the fixed surfaces, and the velocity gradient rising as you move away from those surfaces. Finding the cost-effective means of getting turbulent flow was the engineering end of the solution. Good job indeed.

OhmsLaw
User Rank
Gold
Re: Great Project
OhmsLaw   9/7/2011 4:00:10 PM
I took some photo's of the only unit I had.. My original Prototype which was prior to the design completion of the said thermal solution and Origami cables.  I hope this illustrates the point.

Basically I prevented the air from flowing over top the PSU which had a 1/4" gap or so by blocking that with a plastic cover and created more turbulence with a front opening that also increased the linear air velocity which significantly reduces hot spot temperature rise inside the power supply (PSU). In this case form Lambda.   THis prototype was built 4 weeks after a paper napkin design spec and was later finished 3 weeks later and hand delivered to AVAYA in Denver.

http://db.tt/YASRI5s  (< PDF with images )

dan
User Rank
Iron
Great Project
dan   9/7/2011 12:05:13 PM
NO RATINGS
Well explained and engineered solution.  Just as a suggestion pictures of your project will make it more interesting

Alexander Wolfe
User Rank
Blogger
Well done
Alexander Wolfe   9/6/2011 3:17:32 PM
NO RATINGS
A well described and thought out solution. Sorta like the inverse of putting winglets on the edge of modern jetliners.



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