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Saving Energy: Best-Practices & System View

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TJ McDermott
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Designers should do their part...
TJ McDermott   2/20/2013 12:48:52 PM
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They can use efficient motors as this article suggests.  But the end user, the factories, need to do theirs and turn off systems when not in use.

Do the factory lights need to be on 24 hours a day when there is no 3rd shift?  Does the high pressure hot water system need to be heating through the weekend when there is no one in the fabrication facility?

There's efficient, and there's wasteful.  The returns on wasteful should be explored at least as much as efficiency.

Pubudu
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Practicle Issues
Pubudu   2/20/2013 1:01:11 PM
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Presher. Thanks for the great ideas.

"We need to develop a different mindset" not only for these but also for the every change.

But the problem is the practice issues such as initial costs, when introducing new technological power saving systems to the factories. But in the long run these can be ignored.

apresher
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Saving Energy
apresher   2/20/2013 1:37:08 PM
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TJ, Some of the new developments that would automatically put machinery into Sleep mode when not in use (production pauses) should begin to provide some of the practical solutions you're talking about. But not all of the solutions need to be high tech as you point out.

Ann R. Thryft
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Re: Saving Energy
Ann R. Thryft   2/20/2013 5:45:44 PM
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It's interesting to see system-wide energy saving strategies entering into the design of industrial systems, after a (relatively) long history in electronics design. I'd guess many of the system-wide issues and strategies would be similar, such as a sleep mode. TJ mentions factory systems, such as HVAC systems: haven't these already been energy-reduced, as part of/in concert with the effort to reduce energy in the data center over the last decade or so?

a.saji
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Re: Saving Energy
a.saji   2/21/2013 9:22:28 AM
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"Some of the new developments that would automatically put machinery into Sleep mode when not in use"

Apresher: I guess this is done to save whatever the energy left when the machine is in idle mode. To be honest I feel it's a good method. We should save in whatever the method possible for us so the future generation can benefit out of it.

apresher
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Saving Energy
apresher   2/21/2013 9:32:29 AM
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Ann, There has been an emphasis on replacing drives on fans and pumps with higher efficiency solutions.  And that will continue.  In U.S. factories, motor-driven systems account for over 60 percent of the total energy consumed, and roughly 25 percent of total U.S. overall energy use. Because these numbers are so big, the opportunities/challenges are large and diverse.

apresher
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Saving Energy
apresher   2/21/2013 9:35:20 AM
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a.saji, I agree with you that putting machinery into low power mode during idle times seems like a no-brainer.  Newer network energy control protocols (PROFIenergy, SERCOS Energy and CIP Energy) are just coming onstream and offer a path to achieving these benefits.

Charles Murray
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Re: Designers should do their part...
Charles Murray   2/21/2013 12:33:23 PM
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Interesting point about efficiency versus wastefulness, TJ. It's amazing to think that many factories are indeed so wasteful, especially when it directly affects their own bottom lines. Unfortunately, I believe you're right when you say that the factories need to do their part and turn off systems when not in use.

apresher
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Saving Energy
apresher   2/21/2013 2:09:38 PM
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Until recently, energy was viewed as a fixed expense to there was not as much focus on how to reduce utility bills.  Now with some of the Ethernet-based energy protocols, one long-term goal is to measure the energy used to create a product so it can be added to the bill of materials.  Would be a giant step forward.

Jack Rupert, PE
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Platinum
Re: Saving Energy
Jack Rupert, PE   2/25/2013 4:49:40 PM
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apresher - I noticed that starting to pick up about 5 years ago.  Prior to that, customers who wanted energy monitoring meters were few and far between.  All of a sudden, it seemed like everybody wanted them.

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