Table of Contents Author Guidelines Submit a Manuscript
Advances in Physical Chemistry
Volume 2013 (2013), Article ID 327419, 8 pages
http://dx.doi.org/10.1155/2013/327419
Research Article

Calculation of Thermal Pressure Coefficient of R11, R13, R14, R22, R23, R32, R41, and R113 Refrigerants by Data

Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Iran

Received 30 November 2012; Revised 2 March 2013; Accepted 10 May 2013

Academic Editor: Jan Skov Pedersen

Copyright © 2013 Vahid Moeini and Mahin Farzad. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

For thermodynamic performance to be optimized particular attention must be paid to the fluid’s thermal pressure coefficients and thermodynamic properties. A new analytical expression based on the statistical mechanics is derived for R11, R13, R14, R22, R23, R32, R41, and R113 refrigerants, using the intermolecular forces theory. In this paper, temperature dependency of the parameters of R11, R13, R14, R22, R23, R32, R41, and R113 refrigerants to calculate thermal pressure coefficients in the form of first order has been developed to second and third orders and their temperature derivatives of new parameters are used to calculate thermal pressure coefficients. These problems have led us to try to establish a function for the accurate calculation of the thermal pressure coefficients of R11, R13, R14, R22, R23, R32, R41, and R113 refrigerants based on statistical-mechanics theory for different refrigerants.