Merits of 4 fps flow
Merits of 4 fps flow
(OP)
Currently we are designing condenser water piping (40-90 degrees F water) to be flowing at 4 feet per second or less. Sure it is great for acoustics, but the piping ends up being upsized a lot along the way, and it will cost more. Another senior engineer is insisting this method of design. Will there be significant operation savings?
By the way, this is a project for the U.S. government.
By the way, this is a project for the U.S. government.





RE: Merits of 4 fps flow
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"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Merits of 4 fps flow
If your pipe is at 40F you may need to include the cost of insulation in your economics.
Katmar Software
Engineering & Risk Analysis Software
http://katmarsoftware.com
RE: Merits of 4 fps flow
RE: Merits of 4 fps flow
There is a lot of piping for the building, as this is a geothermal project of about 1500 tons. We are sizing the piping up from 12" to 16", and the branch piping is typically 4" for as little as 27 GPM.
It seemed a little arbitrary to size all of the risers & major runs (including the below ground piping) at 4 fps. I had always learned that it was better to keep the same pressure through the system.
www.eypmcf.com
RE: Merits of 4 fps flow
RE: Merits of 4 fps flow
Slow is not always better.
RE: Merits of 4 fps flow
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"Pumping systems account for nearly 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/