HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
David12345
User Rank
Platinum
Re: Temperature Rise with Pressure
David12345   11/4/2011 4:53:28 PM
NO RATINGS
The temperature changes with friction and pressure changes are very predicable with a good thermodynamics treatment from a Thermo textbook or Engineering Handbook.  This is fairly straightforward when operating away from a phase change condition, but get much more complex when shifting through partially saturated two-phase conditions.

All that being stated, It makes sence that since you are simply scaling-up a functioning pilot system. You could calculate your pilot plant system plumbing Reynolds number and size your scaled-up production system, with Reynolds number guidance, to have the same or lower pressure drop to avoid excessive heating of the fluid in your plumbing.

 

 

Rob Spiegel
User Rank
Blogger
Do you have a Sherlock Ohms case to tell?
Rob Spiegel   11/1/2011 6:07:16 AM
NO RATINGS
We're looking for your stories to add to the Sherlock Ohms blog.

Send along your problem and solution. About 300 words or more. We'd love to know how you soplved a tricky engineering challnege.

Send to rob.spiegel@ubm.com

William K.
User Rank
Platinum
getting out of hot water.
William K.   10/29/2011 12:16:31 PM
NO RATINGS
Pressure drop will always cause a temperature rise proportional to flow. I used this in a test stand to heat oil to 300 degrees F, and not have any risk of overheated heating elements. My customers were amazed, and then very pleased, that it worked very well. The mechanical equivalent is the temperature rise in friction brakes as they slow a vehicle. There is a formula to convert mass flow multiplied by pressure drop across an orfice to temperature rise, unfortunately I don't have it handy.

What I find amazing is that there is a pump able to produce that high a pressure at a flow rate high enough to cause heating.

Tim
User Rank
Platinum
Questioning Looks
Tim   10/28/2011 8:21:53 PM
NO RATINGS
I am surprised at the little faith that your scientist and chemist colleagues had in your setup.  I would that they would be smart enough to know that you weren't heating the water on purpose and that there would be a solution somewhere.  As you stated you need energy to make heat and removing that energy would remove the heat and save the molecules.

Alexander Wolfe
User Rank
Blogger
remember your equations
Alexander Wolfe   10/28/2011 10:01:38 AM
NO RATINGS
Sounds like a case of thermodynamics in action...



Partner Zone
Latest Analysis
Samsung's Galaxy line of smartphones used to fare quite well in the repairability department, but last year's flagship S5 model took a tumble, scoring a meh-inducing 5/10. Will the newly redesigned S6 lead us back into star-studded territory, or will we sink further into the depths of a repairability black hole?
Fifteen European research centers have launched EuroCPS to help European companies develop innovative products for the Internet of Things.
Get your Allman Brothers albums ready. The iconic Volkswagen Microbus may be poised for a comeback, and this time it could be electric.
In 2003, the world contained just over 500 million Internet-connected devices. By 2010, this figure had risen to 12.5 billion connected objects, almost six devices per individual with access to the Internet. Now, as we move into 2015, the number of connected 'things' is expected to reach 25 billion, ultimately edging toward 50 billion by the end of the decade.
NASA engineer Brian Trease studied abroad in Japan as a high school student and used to fold fast-food wrappers into cranes using origami techniques he learned in library books. Inspired by this, he began to imagine that origami could be applied to building spacecraft components, particularly solar panels that could one day send solar power from space to be used on earth.
More:Blogs|News
Design News Webinar Series
3/31/2015 11:00 a.m. California / 2:00 p.m. New York
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
5/7/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Apr 20 - 24, Taking the Internet of Things to the Cloud
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Last Archived Class
Sponsored by Proto Labs
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service