The pressure-enthalpy (P-H) diagram is a useful tool for refrigeration engineers and designers. It is also useful for service technicians. The P-H diagram is a graphical representation of the ...

The path (1- 2s) is for an ideal isentropic compressor, the path (1 - 2) is for a real compressor. The path (2 - 3) takes place in the condensing tank, and the path (4 - 1) is in the evaporating tank.

Carbon dioxide (CO2) is not new to refrigeration systems. Alexander Twining proposed using CO2 as a refrigerant in a British patent granted him in 1850. Thaddeus S.C. Lowe, perhaps best known for his ...