All posts tagged 'VFDs'
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Posted @ 6/2/2017 12:11 PM By Martha Parsons
Chiller & Cooling Best Practices, May 2017, by Fred Berry.
http://www.coolingbestpractices.com/technology/chillers/vsd-chillers-deliver-energy-savings-under-real-world-operation
"Manufacturers are under continual pressure to control costs without affecting operations or worker comfort and safety. Because energy ranks as one of the largest operating expenses, improving energy efficiency of mechanical cooling systems is one of the best ways to reduce operating costs. In a typical water-cooled chiller plant, the chiller itself accounts for most of the energy consumption. That’s why improving chiller efficiency is critical to controlling operating costs."
Posted @ 1/9/2017 5:06 AM By Martha Parsons
ASHRAE Journal, Nov. 2016, by Armin Hauer.
http://bookstore.ashrae.biz/journal/download.php?file=2016Nov_052-059_Hauer.pdf
"Highly efficient air systems require precise fan selection and a method to adjust the fan performance to the Load. Fan supplier applications engineers are experienced in identifying the most suitable fan type and fan size for a specified application, whether the fan duty is fixed or continuously variable. Manufacturer-certified performance and electrical power consumption data support competitive performance contracts and ensure minimum energy consumption."
Posted @ 5/12/2016 5:05 AM By Martha Parsons
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."
Posted @ 4/25/2016 5:05 AM By Martha Parsons
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."
Posted @ 2/23/2016 1:26 PM By Martha Parsons
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)."
Posted @ 1/6/2016 3:22 PM By Martha Parsons
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.
Posted @ 12/11/2015 5:54 AM By Martha Parsons
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."
Posted @ 12/10/2015 11:01 AM By Martha Parsons
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."
Posted @ 9/28/2015 6:13 AM By Martha Parsons
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."
Posted @ 8/4/2015 6:11 AM By Martha Parsons
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."