|
|||||
|
|
An experimental investigation and modelling of flow boiling heat transfer of isobutane-compressor oil solution in a horizontal smooth tube |
|
| Affiliation: | 1. School of Electric Power, South China University of Technology, Guangzhou 510640, China;2. Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, South China University of Technology, Guangzhou 510640, China;3. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China;1. Department of Engineering and Design, University of Sussex, Brighton BN1 9QT, UK;2. Department of Mechanical Engineering, School of Engineering, University of Tasmania, Hobart, TAS 7001, Australia;3. Renewable Energies Laboratory, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran;4. School of Biomedical Engineering, University of Technology Sydney, NSW 2007, Australia;5. Department of Mechanical Engineering, Shiraz University, Shiraz, Iran;6. School of Mechanical and Mechatronic Engineering, University of Technology Sydney, NSW 2007, Australia;7. Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran |
| Abstract: | Experimental results of local heat transfer coefficients for the boiling of working fluids (solutions of R600a with mineral naphthenic oil ISO VG 15) in a smooth tube with a small diameter (5.4 mm) are presented. The experiments have been performed in the following ranges: for the inlet pressure from 65.7 kPa to 82.2 kPa, for the heat flux from 2500 to 3300 W m?2, and for the mass velocity of the working fluid from 11.90 to 15.99 kg m?2 s?1). The quantitative estimation in reduction of the heat transfer coefficient of the wetted surface in the evaporator at a high oil concentration in the mixture is examined. The influence of heat flux and mass velocities on the values of the local heat transfer coefficients is analyzed. The equation for the modelling of the local heat transfer coefficient for boiling of an isobutane/compressor oil solution flow in the tube is suggested. |
| Keywords: | Heat transfer coefficient Working fluid Boiling Isobutane Oil Concentration Correlation Coefficient de transfert de chaleur Fluide actif Ebullition Isobutane Huile Concentration Corrélation |
| 本文献已被 ScienceDirect 等数据库收录！ | |