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.

Highlights

  • Popular interest in the use of refrigerant blends started in the late 1950s

  • Liquids and dense fluids are usually considered to be complicated on a molecular scale, and a satisfactory theory of liquids only began to emerge in the 1960

  • R13 serves as our primary test fluid because of the abundance of available thermal pressure coefficients data [6, 30]

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Summary

Introduction

Popular interest in the use of refrigerant blends started in the late 1950s. The emphasis was placed on energy savings through the reduction of irreversibility in the heat exchanger and on capacity variation during operation through the control of the fluid composition. Liquids and dense fluids are usually considered to be complicated on a molecular scale, and a satisfactory theory of liquids only began to emerge in the 1960 They show a number of experimental regularities, some of which have been known by theoretical basis [7,8,9,10]. An accurate empirical potential has Advances in Physical Chemistry been found for dense cesium fluid and it is used to test the applicability of the theory These theoretical predictions are in good agreement with experimental results [19,20,21,22,23,24,25,26].

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