Environmental and Performance Results for Low GWP AC Fluid Candidates

摘要

The new refrigerant HFO1234yf is being evaluated for use as a replacement for R-134a in many cooling applications. It has bee n proposed t o use HFO-1234yf for many AC and refrigeration applications, but we show that it is not adirect replacement for higher performance refrigerants like R-410Afor heating and cooling. New refrigerant compositions have been developed and are being evaluated for use in air conditioning and heat pump applications in order to reduce emissions of carbon dioxide and higher GWP gases that can contribute to global climate change. Some of these new compositions are marginally flammable, and are expected be classified by ASHRAE and ISO as "2L" refrigerants base d on low burning velocity and low heats of combustion. This paper presents measured cooling and heating performance results for some of the new candidate refrigerants, and environmental impacts are modeled based on those measured results.. So me of the trade offs impacting environm ental impact of the developme ntal refriger ants, including GWP value and ene rgy efficiency performance will be di scussed. It i s show n t he ower GWP f luids do n ot nece ssarily gi ve t he best envi ronmental performance.