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Massic heat capacities and Joule–Thomson coefficients of CH2FCF3(R134a) at pressures up to 30 MPa and temperatures between about 253 K and 523 K

✍ Scribed by G. Ernst; J. Gürtner; H. Wirbser

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
230 KB
Volume
29
Category
Article
ISSN
0021-9614

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✦ Synopsis

The massic heat capacity cp = (1h/1T)p of 1,2,2,2-tetrafluoroethane (refrigerant R134a) was measured at 18 temperatures from 253 K to 523 K at pressures between 40 kPa and 30 MPa. The Joule-Thomson coefficient mJT = (1T/1p)h of this substance was measured at six temperatures from 333 K to 423 K at pressures up to 20 MPa. The R134a probably has no ozone depletion potential. Its global warming potential is about one-tenth of that of the refrigerant R115 (C2F5Cl) for which it can be a substitute as a working fluid in energy technologies.

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