Condensation of saturated vapours on isentropic compression: A simple criterion

✍ Scribed by V.S. Patwardhan

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 237 KB
• Volume: 7
• Category: Article
• ISSN: 0890-4332
• DOI: 10.1016/0890-4332(87)90001-9

✦ Synopsis

A criterion is derived and tested for determining whether the isentropic compression of saturated vapours leads to superheat or condensation. This criterion needs only values of the critical temperature, the acentric factor and the liquid specific heat. The application of the criterion for selection of a working fluid both for heat pumps and heat engines is discussed. NOMENCLATURE a, b, c, d constants in equation ( 9) CpL liquid specific heat at constant p H enthalpy p pressure R universal gas constant sL, sv entropy of saturated liquid and vapour respectively T temperature Tc critical temperature Subscripts L for liquid ref reference value V for vapours Greek symbols defined by equation (6) 2-latent heat of vaporisation o T/T~ to acentric factor