Heat Pumps are favored for their ability to deliver heat from low temperature sources at more useful temperature levels, with the advantage of contributing significantly to reduce primary energy and CO2 emissions.
The higher the temperature the greater the number of applications where the upgraded heat can be used. However, until recently there was no suitable working fluid that had a high enough critical temperature to be used in such applications.
A new HFO, HFO-1336mzzZ has been developed, which might be the solution, because of its boiling point of 33.4 °C and its relatively high critical temperature of 171.3 °C (101.1 °C for HFC-134a, or 154 °C for HFC-245fa). The product has a GWP of 2, is non-flammable and non-toxic, and is very stable at high temperatures.
Its high critical temperature can help to expand the range of heat pump use, delivering condensing temperatures up to 160 °C with attractive energy efficiency.