Thermophysical Properties of Low GWP Refrigerants: An Update

Thermophysical Properties of Some Selected Alternative Refrigerants

A summary of a thermophysical properties program for six candidate alternative. refrigerants is given. This work has been performed recently at the National Institute of Standards and Technology (U.S.A.), Thermophysics Division, in Gaithersburg, Maryland. Properties measured include gas and liquid·phase PVT, vapo~ pressures, surface tension, index of ~efraction, dielect~ie eons~ant, gas phase s...

LITERATURE REVIEW Reference List for low GWP Refrigerants Testing

Thermal Decomposition of Lower-GWP Refrigerants

The use of chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) has been widely restricted. They have been replaced with hydrofluorocarbons (HFCs) in order to protect the ozone layer. However, the leakage of refrigerant into air from active or end-of-life air conditioners has been a serious environmental issue owing to the high global warming potential (GWP) of HFCs. It has therefore...

New High Performance, Low GWP Refrigerants for Stationary AC and Refrigeration

In response to concerns about global climate change, and in consideration of probable legislation that may impact the production and use of refrigerants with high global warming potential, a set of new refrigerant candidates has been developed for evaluation. Some candidates are designed for stationary air conditioning in residential and light commercial end uses. Other refrigerant candidates w...

Performance of R410A and R22 Low GWP Alternative Refrigerants at Elevated Ambient Temperatures

Growing concerns about the global warming impact of refrigerants used in HVAC&R equipment are driving development and evaluation of alternative refrigerants with lower global warming potentials (GWPs). The Air Conditioning, Heating, and Refrigeration Institute (AHRI) recently coordinated the Low-GWP Alternative Refrigerant Evaluation Program (AREP) in which commercial, university, and governmen...