A Comparative Study on the Condensation Heat Transfer of R-513A as an Alternative to R-134a

被引:11
作者
Karageorgis, Andreas [1 ]
Hinopoulos, George [1 ]
Kim, Man-Hoe [2 ,3 ]
机构
[1] ElvalHalcor Co, Halcor Copper Tube Div, Oinofyta 32011, Viotia, Greece
[2] Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea
[3] Kyungpook Natl Univ, IEDT, Daegu 41566, South Korea
关键词
condensation heat transfer; microfin tube; low-GWP refrigerant; R-513A; R-1234yf; R-1234ze(E); HORIZONTAL SMOOTH; R134A; TUBE; REFRIGERANTS; R1234ZE(E); R410A; R22;
D O I
10.3390/machines9060114
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper presents the two-phase condensation heat transfer and pressure drop characteristics of R-513A as an alternative refrigerant to R-134a in a 9.52-mm OD horizontal microfin copper tube. The test facility had a straight, horizontal test section with an active length of 2.0 m and was cooled by cold water circulated in a surrounding annular space. The annular-side heat transfer coefficients were obtained using the Wilson plot method. The average heat transfer coefficient and pressure drop data are presented at the condensation temperature of 35 degrees C in the range of 100-440 kg center dot m(-2)center dot s(-1) mass flux. The test data of R-513A are compared with those of R-134a, R-1234yf, and R-1234ze(E). The average condensation heat transfer coefficients of the R-513A and R-1234ze(E) refrigerants were similar to R-134a at the lower mass flux (100 similar to 150 kg center dot m(-2)center dot s(-1)), while they were up to 10% higher than R-134a as the mass flux increased. The pressure drop of R-513A was similar to R-1234yf and 10% lower than that of R-134a at the higher mass flux. The R-1234ze(E) pressure drops were 20 % higher compared to those of R-134a at the higher mass flux.
引用
收藏
页数:12
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