Refrigerant circuit restrictions can be common things like a plugged filter drier or a restricted metering device. They can also be more difficult to diagnose and exotic issues like a kinked liquid ...

Scientists at Germany’s Fraunhofer Institute ISE and a consortium of heat pump manufacturers have achieved a new efficiency record in their development of a low-refrigerant propane refrigeration ...

Water-cooled centrifugal chillers for comfort-cooling applications are generally designed for a set of standard conditions specified by the Air-Conditioning, Heating and Refrigeration Institute (AHRI) ...

Currently heat pump manufacturers are mainly focusing on cost reductions and sustainable refrigerants. In the project “LC150” (Low Charge 150 g), the Fraun-hofer Institute for Solar Energy Systems ISE ...

A recently filed patent (Publication Number: US20230296299A1) describes a refrigeration cycle apparatus that includes a unique filter member designed to capture acid contained in the refrigerant. The ...

Heat pumps are a key technology in the heat transition, but many of the devices still use environmentally harmful refrigerants. The Fraunhofer Institute for Solar Energy Systems ISE has now developed ...

Long-time EC&M reader Joe Territo, president of Territo Electric in Ocoee, Fla., knows the importance of the requirements of Art. 440 and its growing role in facilities. A Territo client operates a ...

Article 430, the largest Article in the NEC, is commonly understood to be the “motor” Article. But if motors are a part of air-conditioning (A/C) and refrigeration equipment, they also fall under Art.