Lies, damned lies, and VSD efficiency!
Lies, damned lies, and VSD efficiency!
2
jraef (Electrical)
(OP)
Well written article that I thought worthy of sharing with those who don't peruse this site provider, Drives and Controls UK magazine. I hope the direct link works.
http://www.drives.co.uk/features.asp?id=3
http://www.drives.co.uk/features.asp?id=3
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
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RE: Lies, damned lies, and VSD efficiency!
Yours
Bill
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Lies, damned lies, and VSD efficiency!
RE: Lies, damned lies, and VSD efficiency!
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies
RE: Lies, damned lies, and VSD efficiency!
http://www.gambica.org.uk/web_images/documents/pub...
Published in 2008, but few people noticed.
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies
RE: Lies, damned lies, and VSD efficiency!
There is a performance standard for drives within the HVAC industry. This was recently released:
http://www.ahrinet.org/App_Content/ahri/files/stan...
RE: Lies, damned lies, and VSD efficiency!
RE: Lies, damned lies, and VSD efficiency!
David Simpson, PE
MuleShoe Engineering
"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
RE: Lies, damned lies, and VSD efficiency!
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies
RE: Lies, damned lies, and VSD efficiency!
If the input kW going into the drive is reduced then it's saving energy.
And Jeff, comparing the VFD energy savings to any other kind of process control method is just plain stupid and wrong.
Seriously though, interesting article pointing out that the real overall efficiency of the complete system is what matters.