Figure 2 is a pressure-enthalpy diagram for R-134a in a traditional vapor compression refrigeration cycle. Starting at ... Due principally to the higher CO2 working pressures, several challenges were ...

Carbon dioxide ... the design pressure of a CO2 system: high off-cycle pressure and defrost pressure when hot gas defrost is used. Off-cycle pressure can be very high. This challenge can be met in ...

GTI will design ... carbon dioxide where it is held at or above its critical temperature and critical pressure. Source: DOE NETL said that the average efficiency of the U.S. fleet of steam Rankine ...