24 June 2014

A NON-FLAMMABLE, ZERO-ODP, LOW GWP WORKING FLUID FOR HIGH TEMPERATURE HEAT PUMPS: DR-148


This paper introduces a new developmental refrigerant, DR-148, as a potential working fluid for high temperature heat pumps. DR-148 is a non-flammable, hydrofluoroolefin-
based fluid with an ozone depletion potential of zero and a global warming potential of 148. The components of DR-148 remained chemically stable in the presence of metals up to the maximum temperature tested of 250 oC. DR-148 thermodynamic performance under cycle conditions representative of potential high temperature heat pump applications was evaluated through computational modeling. DR-148 has a relatively high critical temperature, generates relatively low vapor pressures and enables high cycle energy efficiencies. It could enable more environmentally sustainable heat pump platforms for the utilization of abundantly available low temperature heat to meet heating duties at higher temperatures and
with higher energy efficiencies than incumbent working fluids.