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 ...

Heat pumps can now achieve sufficiently high flow temperatures to operate most heating systems, even in older buildings. They are not yet highly efficient, but new refrigerants are expected to provide ...

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 ...

Fujitsu General. has filed a patent for an air conditioner with a refrigerant circuit connecting indoor and outdoor units. The system includes a memory storing an estimation model to determine ...

One of the great inventions of our time — in terms of its social impact and influence on the health care and food preservation industries — refrigeration equipment is everywhere, from hotels, ...

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.