Technical

High-Efficiency Chillers Projected to Provide Big Savings

September 5, 2011
The University of Texas Arlington has commissioned two new high-efficiency chillers that will serve the main campus cooling loop and provide projected annual energy savings of nearly $200,000.


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Shaft Grounding Rings Improve Sustainability of HVAC Motors

August 22, 2011
Shaft currents induced by VFDs can wreak havoc with bearings, so a reliable method of shaft grounding is essential.


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Fail-Safe Overheating Protection: A Necessity for Electric Heaters

August 8, 2011
Record power demands during the last two winters caused electrical distribution zones to trip off-line.


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NREL Data Center Is a Model of Energy Efficient Design

July 18, 2011
The data center for the U.S. Department of Energy’s (DOE’s) National Renewable Energy Laboratory (NREL) recently benefited from an “extreme home makeover” as it moved from leased office space to the lab’s ultra energy efficient Research Support Facility (RSF). The lessons learned are expected to help data centers across the nation green up their ones and zeros.
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IAQ Research Reveals Regional Differences

July 4, 2011
High humidity within homes creates numerous problems. Despite the many home-related humidity issues, there has been little to no measured data available on actual indoor humidity levels in U.S. households. That is why the U.S. Department of Housing and Urban Development (HUD) funded Steven Winter Associates Inc. (SWA) to collect data from homes on interior humidity levels.
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Renovating HVAC Systems at Air Force Base Achieves Energy Goals

June 20, 2011
United States Air Force personnel sought a solution to renovate the makeup air and exhaust ventilation systems to reduce energy usage in a 35,000-square-foot aircraft corrosion control hangar in Oklahoma City. By utilizing Munters energy recovery systems, engineers at the base achieved their mission.
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Mold Control: Preventing Moisture in Schools During Summer

June 6, 2011
The moisture content in a school’s building envelope can provide the medium that mold needs for incubation and growth. Whether a school is under construction or unoccupied during the summer break, it likely is without an HVAC system to help control moisture. Without humidity control, school buildings can become a breeding ground for mold and mildew.
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Arby's Franchisee Test Shows Air Curtains Improve Walk-In Cooler Efficiencies

May 23, 2011
Claims that air curtains installed on walk-in cooler entrances save energy and refrigeration equipment wear-and-tear have been corroborated by a fast food restaurant’s audited energy test. The results indicate the compressor ran 1.75-hours less during one week - a 27 percent reduction in compressor run-time and equipment wear-and-tear.
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OpenStudio Visualizes Energy Use in Buildings

May 9, 2011
Together, residential and commercial buildings account for a staggering 40 percent of energy use in the United States, according to the U.S. Department of Energy (DOE). However, DOE’s National Renewable Energy Laboratory (NREL) is developing a suite of tools to tame this energy beast - and it is free to anyone who wants to use it.
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A Brief Introduction to Building Information Modeling (BIM)

April 18, 2011
Recent industry trends have given rise to a new generation of building design tools known as building information modeling, or BIM. BIM goes further than traditional CAD drawings by providing intelligence to building components (such as HVAC) as well as providing system- and building-wide information and awareness (system flows or building loads) in addition to spatial relationships.
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Michael Willburn, president, Infloor Heating Systems, joins the program to discuss his company, radiant heating, industry trends, and whether contractors are becoming more interested in radiant heating. Posted on July 11.

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