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Flow-calorimetric massic heat capacities and Joule–Thomson coefficients of CHF2Cl (Refrigerant R22) at pressures up to 15 MPa and temperatures between 300 K and 450 K

✍ Scribed by J. Gürtner; H. Wirbser


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

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✦ Synopsis


The thermodynamic data for CHF Cl contained in this paper are a basis for formulations 2 of the thermodynamic behavior of this special substance. It will also contribute to the improvement of formulations for new substances.


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✍ G. Ernst; J. Gürtner; H. Wirbser 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 230 KB

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 p

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The massic heat capacity values c p of CFCl 3 and CF 2 ClCFCl 2 and of (0.5CFCl 3 + 0.5CF 2 ClCFCl 2 ) were measured with high accuracy with a flow apparatus. The results for the pure substances were published in an earlier paper. The present paper contains the results for the mixture. The density o