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Heating & Boilers

Well-maintained central plants are a facility's lifeblood

Chuck Dale-Derks, P.E.
I just spent $3,700 for a dealer to inspect and repair my daughter’s 8-year-old passenger minivan. The value of the vehicle is about $4,200; however, a new replacement would have …
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Cooling & Chillers

Is Variable Fan Speed an Answer to Part-Load Efficiency in Modular Air-Cooled Chillers and Heat Pumps?

Mustafa Yanik Yabing Liu
One particular research avenue shows that dynamically changing fan speeds could give instant seasonal energy efficiency improvements in reversible, modular chiller units. …
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Heating & Boilers

The Design of a Steam Plant is not a Lost Art

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Ionel Petrus, P.E.
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Rosemary Hwang
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Kevin Andreone
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Kevin Ricart
Approximately six years ago, we visited the manufacturing plant of one of the largest boiler manufacturers in the country. The visit was related to a specific project that required high-efficiency …
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Heating & Boilers

High-achieving school chooses high-performance boiler

Dan Rettig
Paul M. Dorman High School in Roebuck, South Carolina is achieving academic excellence that’s the envy of many other schools across the Southeast. Dorman High sends 86 percent of its …
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Facility Files

Facility Files: Replacing a College Campus Administration's Rooftop System

Amanda Parolise
This month’s Facility File will focus on the B2B June test for the renovation of an office building located on a major corporation’s U.S. headquarters campus. The existing HVAC system …
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Ventilation

Ward Off Unhealthy Microbial Invaders with the Proper IAQ

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Stephanie Taylor, M.D., M. Arch, CIC
Have you ever wondered how chemical compounds or microbes actually get into the cells of your body and have a powerful influence on your health? …
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Cooling & Chillers

Cold Rooms: Thermostatic Expansion Valves and Solenoid Valves

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John Broughton
As with any refrigeration system, controlling the flow of refrigerant is vital in making a cold room operate properly. Two of the most common types of refrigerant control valves are …

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