HVACR field service terminology is often confusing and misused even by the most seasoned service veterans. Two important service terms that are often misunderstood and misused are ‘flooding’ and ‘slugging.’ Each one will be thoroughly defined and explained as they apply to refrigeration and air conditioning compressors.
Thermostatic expansion valves (TXV) are responsible for metering the proper amount of refrigerant into an evaporator coil. When they fail, they either cause the evaporator to be flooded (overfed) or starved (underfed) for refrigerant. Read more and find out how to diagnose a defective TXV.
The changing supermarket industry is also causing some changes in an upcoming Food Marketing Institute (FMI) conference. The formerly separate Energy & Technical Services Conference and Retail Store Development Conference have been integrated into a new event: the FMI Energy & Store Development Conference.
How much money could be saved if a chiller system used as much variable-frequency drive (VFD) technology as possible, and controlled it with a system to coordinate the operation to match load demands and tweak performance efficiency as much as possible? The University of Texas at Austin had an opportunity to find out.
In 2008, Alexandria City Public Schools (ACPS) hired the Leesburg, Va., offices of Hayes Large Architects LLP and B2E Consulting Engineers to help turn its Minnie Howard Middle School campus into a laboratory for testing green building technologies that could be implemented system-wide.
Sales of goods in the United States are still inching their way back up to prerecession numbers, including many HVACR products. In contrast, geothermal unit sales have jumped in recent years. Manufacturers of geothermal products have growing public awareness and tax incentives to thank for this windfall.
Source: Air-Conditioning, Heating, and Refrigeration Institute (AHRI). Industry figures are estimates that are derived from the best available figures supplied by a sample of AHRI member companies.
From hero to hack, the HVACR industry and its customers hold varying opinions about the one-man shop. Some find these business entities to be trustworthy necessities while others consider them as black marks on the trade’s reputation. Find the balance in between and the industry just may have found where the one-man shop fits.
Interest in and use of geothermal is growing again, and a variety of HVAC units and components are available to meet the rising demand. Listed here are a sampling of the geothermal products currently offered.
A number of homeowners and building owners are taking a closer look at the benefits that geothermal technology offers. In the process, they are unearthing the truth about geothermal systems and dispelling many of the commonly held misconceptions that surround the technology, including the 10 presented here.
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