期刊
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
卷 85, 期 -, 页码 334-352出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2017.10.011
关键词
R1234ze(E); Flow boiling; New correlation; Heat transfer; Pressure drop
资金
- National Science Fund for Distinguished Young Scholars of China [51625603]
- National Key Research and Development Plan of China [2016YFB0402102]
This study presents flow boiling heat transfer and pressure drop characteristics of R1234ze(E) in a smooth horizontal tube with an inner diameter of 6 mm. The experiments were conducted at saturation pressures from 0.215 to 0.415 MPa, mass fluxes from 130 to 258 kg m-2 s-1 and heat fluxes from 10.6 to 74.8 kW m-2. The influences of saturation pressure, mass flux and heat flux were analyzed. Furthermore, the performance of R1234ze(E) was compared with R600a. The results show that heat transfer coefficient and pressure drop of R600a are larger than R1234ze(E). Several well-known correlations were evaluated and the results indicate that the correlation of Fang (2013) and Yang et al. (2017) give the best fit to the heat transfer coefficient and pressure drop respectively. Finally, a new heat transfer correlation was proposed and it makes great progress in the prediction accuracy. (C) 2017 Elsevier Ltd and IIR. All rights reserved.
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