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Energy Newsbriefs Blog

This current awareness service is prepared by the WSU Energy Program Library with funding from the U.S. Department of Energy State Energy Program. This information is provided for energy professionals and interested members of the public to highlight recent energy-related news, articles, and reports that discuss energy efficiency, energy conservation, and renewable sources of energy in engineering and policy circles.

 

All posts tagged 'VFDs'

Check out all of the posts tagged with 'VFDs' below. If you still can't find what you are looking for, try using the search box.

Energy Savings in Electrical Distribution Systems

Consulting-Specifying Engineer, Apr. 2016, by Cameron Bellao.
https://www.csemag.com/single-article/energy-savings-in-electrical-distribution-systems/2d990c83c1337f2b887d739a1b1472f6.html

"Consider these energy efficiency options for retrofitting existing and designing new buildings’ electrical distribution systems."

Optimized Power-Demand Control System for Electric Motors

Heating, Piping, Air Conditioning Engineering, Mar. 2016, by Alexander L. Burd and Galina S Burd.
http://hpac.com/motors-drives/optimized-power-demand-control-system-electric-motors

"During off-design load conditions, use of variable-frequency drives (VFDs) reduces electric-motor power demand. At design and near-design loads, however, it has the opposite effect. Widespread application of VFDs, then, might cause an increase in the design power demand of electric utilities, forcing them to administer mandatory consumer power-demand-shedding programs. An increase in design power demand over installed power capacity might lead to other negative consequences, such as electric-utility power outages, consumer productivity losses, and increased environmental pollution. This article demonstrates how automatic switchover from VFD control mode to VFD-bypass control mode and back can help to mitigate, if not eliminate, these negative impacts."

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Select the Best VFD for Your Application

Maintenance Technology, Feb. 2016.
http://www.maintenancetechnology.com/2016/02/select-the-best-vfd-for-your-application/

"According to the technical experts at Mitsubishi Electric Automation, Vernon Hills, IL, there are several factors to consider when selecting variable-frequency drives (VFDs)."

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Choosing the Proper VFD can Limit Harmonics

Pumps & Systems, Dec. 2015, by Jeffery Lovelace.
http://www.pumpsandsystems.com/pumps/december-2015-choosing-proper-vfd-can-limit-harmonics

"Facilities predominantly using these drives may face concern from power utility companies. Variable frequency drives (VFDs) have vastly evolved during the last 25 years.

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System Considerations for VSDs in Industrial Machinery

Pumps & Systems, Nov. 2015, by Paul Stavrou.
http://www.pumpsandsystems.com/pumps/november-2015-system-considerations-vsds-industrial-machinery

"The changing landscape of hydraulic drives is leading many fluid power specialists to quickly adapt to VSDs."

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Choosing Between Soft Starters & Adjustable Frequency Drives

Pumps & Systems, Nov. 2015, by Nichole Angiola.
http://www.pumpsandsystems.com/pumps/november-2015-choosing-between-soft-starters-adjustable-frequency-drives

"Motors often require large amounts of energy when quickly accelerating to full speed. Using soft starters and adjustable frequency drives reduce in-rush currents and limit torque—protecting valuable equipment and extending the motor's life by reducing motor heating caused by frequent starts and stops. Choosing between a soft starter and an adjustable frequency drive (AFD) often depends on the application, system requirements and cost, both for initial startup and over the life cycle of the system."

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Energy Efficiency in Water & Wastewater

Pumps & Systems, Sep. 2015, by Jeff Bergman.
http://www.pumpsandsystems.com/pumps/september-2015-energy-efficiency-water-wastewater

"VFDs [Variable Frequency Drives] can reduce energy consumption and water loss in variable pumping systems."

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Is a VFD a Cost-Effective Option for Your Application?

Pumps & Systems, July 2015, by Mark Berube.
http://www.pumpsandsystems.com/motors/july-2015-vfd-cost-effective-option-your-application

"While variable frequency drive (VFD) technology can significantly increase system efficiency by controlling pump speed, not every application requires a VFD. To determine when to apply this technology, end users must conduct detailed calculations to verify the cost-effectiveness of using a VFD."

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VFD Trends and Solutions for Drive Systems

Plant Engineering, June 2015, by Alex Ward.
http://www.plantengineering.com/single-article/vfd-trends-and-solutions-for-drive-systems/c655baa26fc5bd8e9e7a4e700ce2b7c5.html

"The increase in variable frequency drive (VFD) installations across the globe has meant that drives are being applied in more challenging system environments. Not only is the environment challenging, but drives also have a few inherited issues that can limit the overall system performance. Harmonics mitigation, filtering voltage spikes are two key issues."

Medical Data Center Controls Uptime, Energy With Variable-Frequency Drives

HPAC Engineering, Mar. 2015, by DANFOSS.
http://hpac.com/motors-drives/medical-data-center-controls-uptime-energy-vfds

A "From the Field: Design Solutions" column, provided by the manufacturer, Danfoss.
"At a medical data center in the upper Midwest, cooling-system uptime reliability is ensured with redundant computer-room air-conditioning (CRAC) units. For example, in a room needing eight units, 10 are employed. Drives cut energy use 40 percent by controlling HVAC fan speed on CRAC units."

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