HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Blog
Case Study: Variable Frequency Drives Cut Energy Costs
4/3/2012

Siemens' G150 variable frequency drive.
Siemens' G150 variable frequency drive.

Return to Article

View Comments: Newest First|Oldest First|Threaded View
apresher
User Rank
Blogger
VFDs
apresher   4/8/2012 9:42:14 PM
NO RATINGS
Thanks for the comment, Jack. There definitely is a need for more education on energy saving possibilities with VFDs, although I think the suppliers are trying to be effective in this area. There are also different types of incentives to help accelerate and finance ROI.

Jack Rupert, PE
User Rank
Platinum
Re: Variable Frequency Drives
Jack Rupert, PE   4/8/2012 6:45:51 PM
NO RATINGS
You're absolutely right, apresher.  VFD's have a whole range of applications where they signficantly improve efficiency.  I think the vendors need to be more proactive in selling these features and showing the cost savings.

apresher
User Rank
Blogger
Variable Frequency Drives
apresher   4/6/2012 11:11:38 AM
NO RATINGS
Good article.  Certainly it's well-known that variable frequency drives will save on energy costs if properly applied. Vendors provide both assistance and calculator applications to help identify and cost justify these newer systems.  But the potential savings also go beyond traditional pump and fan applications to other areas such as regen, power factor and common bus applications. Some companies seems determined to seek out savings while others are much less aggressive in investing the engineering it takes to reduce energy costs.

William K.
User Rank
Platinum
Variable frequency drives cut energy costs.
William K.   4/4/2012 10:53:38 AM
NO RATINGS
IT should not be any surprise that using a VFD to reduce the power applied to any process that requires less than the maximum capability of a prime mover will reduce energy consumption and power waste. 

Any process that does not need full power constantly should be examined as a candidate for a VFD, although in some situations it may not make economic sense. Variable energy input control can be extended to other areas as well. In pneumatic systems, as an example, all of the energynused pushing air through undersized piping to provide adequate flow is wasted. The fastest way to see if that is happening is to observe the cylinder pressure and see if it continues to rise after the cylinder stroke is completed. The same applies to hydraulic systems and cylinders. An added advantage is that larger piping can provide faster cycle time, usually without any increased energy consumption. OF course, in hydraulic systems a VFD can provide for inceased pump delivery only during the periods when high flow is required, which can result in a very large improvement in overall system efficiency, and as a free bonus it can reduce system cooling requirements quite a bit. In fact, in at least one application the use of a VFD for hydraulic pumps reduced power consumption by more than 50%, with no compromise in performance at all.

naperlou
User Rank
Blogger
Great Solution
naperlou   4/3/2012 9:24:49 AM
NO RATINGS
This is another great example of industry becoming more efficient.  As the article points out, industry uses a third of the energy used in the US.  The opportunity to improve efficiency in these areas is great, and this opportunity comes mostly from better engineering.  There is a lot of talk about green computing, but this is a much better area to concentrate on.  The payback is greater.

Partner Zone
More Blogs
With major product releases coming from big names like Sony, Microsoft, and Samsung, and big investments by companies like Facebook, 2015 could be the year that virtual reality (VR) and augmented reality (AR) finally pop. Here's take a look back at some of the technologies that got us here (for better and worse).
Good engineering designs are those that work in the real world; bad designs are those that don’t. If we agree to set our egos aside and let the real world be our guide, we can resolve nearly any disagreement.
The Industrial Internet of Things is bringing a previously reluctant process industry into the wireless fold. The ability to connect smart sensors to the Internet has spiked the demand for wireless devices in process manufacturing, according to the new study from ARC Advisory Group.
Enterprising Tesla Model S owner Steve Sasman seems to have figured out a way of recouping some of the cost on his car by renting the trunk out on AirBnB, the room/house rental website.
Everyone has had the experience of trying to scrape the last of the peanut butter or mayonnaise from the bottom of a glass jar without getting your hand sticky. Inventor Ron Jidmar thinks he has a solution to all of that nonsense with a flexible jar design that can be squeezed with one hand to lift contents from the bottom to the top of a jar or container, leaving the other hand free to scoop the contents out cleanly.
Design News Webinar Series
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
12/10/2014 8:00 a.m. California / 11:00 a.m. New York
11/19/2014 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
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jan 26 - 30, IPv6 for Micros – Hands-On
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  67


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 Stratasys
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