Downward two-phase flow applications for a non-conventional heat pump

Fluid selection and parametric analysis on condensation temperature and plant height for a thermogravimetric heat pump

“…The required height could differ up to factor of 7 by employing different substances. The PF5050 perfluorocarbon and the HFC134a (1,1,1,2tetrafluoroethane) hydrofluorocarbon were also found to be the most promising working fluids (apart from some aspects related to GWP), with the main disadvantage being the obtained plant heights, based on which PF5050 was recommended for 10-12 storey buildings while HFC134a for skyscrapers [12].…”