） Abstract： Calculations of refrigerant thermal properties are desired to be very fast and stable in cases of simulation of refrigeration system, etc
The implicit regress and explicit calculation method is a quite good method for the fast and stable calculation of refrigerant thermodynamic properties, and it has been used for saturated, two-phase and superheated refrigerants
In this paper, the implicit regress and explicit calculation method is extended to the calculation of subcooled refrigerants
As an example, the fast calculation formulae for subcooled refrigerant R22, R134a, R410A and R407C are developed based on the source data derived from NIST REFPROP 7
1
The comparison shows that, for pure refrigerant, the total mean relative deviations of the fast calculation formulae are less than 0
02 % and the maximum relative deviations are less than 0
60%; for refrigerant mixtures, the total mean relative deviations of the fast calculation formulae are less than 0
08%
The maximum relative deviation of R410A is less than 3
36% while the maximum relative deviation of R407C is less than 0
87%
The mean calculation speed of the fast calculation formulae for thermal properties of pure refrigerant and that of refrigerant mixtures are near 100 times and more than 1500 times faster than those of NIST REFPROP 7
1, respectively
Keywords： Fast calculation; Implicit curve-fitting; Refrigerant thermodynamic properties; Subcooled僴 下载PDF阅读器 PDF全文下载： 初稿 （ 558 ） 作者简介： 通信联系人： 【收录情况】 中国科技论文在线： 丁国良
2、 Fujitsu General Institute of Air-Conditioning Technology Limited
） 摘要： Calculations of refrigerant thermal properties are desired to be very fast and stable in cases of simulation of refrigeration system, etc
The implicit regress and explicit calculation method is a quite good method for the fast and stable calculation of refrigerant thermodynamic properties, and it has been used for saturated, two-phase and superheated refrigerants
In this paper, the implicit regress and explicit calculation method is extended to the calculation of subcooled refrigerants
As an example, the fast calculation formulae for subcooled refrigerant R22, R134a, R410A and R407C are developed based on the source data derived from NIST REFPROP 7
1
The comparison shows that, for pure refrigerant, the total mean relative deviations of the fast calculation formulae are less than 0
02 % and the maximum relative deviations are less than 0
60%; for refrigerant mixtures, the total mean relative deviations of the fast calculation formulae are less than 0
08%
The maximum relative deviation of R410A is less than 3
36% while the maximum relative deviation of R407C is less than 0
87%
The mean calculation speed of the fast calculation formulae for thermal properties of pure refrigerant and that of refrigerant mixtures are near 100 times and more than 1500 times faster than those of NIST REFPROP 7
1, respectively
关键词： Fast calculation; Implicit curve-fitting; Refrigerant thermodynamic properties; Subcooled僴 Guoliang Ding 1,*
Masaharu Fukaya 3, （ 1、 Institute of refrigerant & cryogenics, Shanghai Jiaotong University
3、 Fujitsu General Institute of Air-Conditioning Technology Limited Kawasaki
