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| Migration Characteristic of Spherical Nanoparticles from Liquid to Vapor Phase during Refrigerant/Nanolubricant Mixture Boiling |
| DING Guo-Liang-1, PENG Hao-2, HU Hai-Tao-1, ZHUANG Da-Wei-1 |
| (1. Institute of Refrigeration and Cryogenics Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. Key Laboratory of Microgravity (National Microgravity Laboratory）, Institute of Mechanics of Chinese Academy of Sciences, Beijing 100190, China) |
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Abstract In order to evaluate the heat transfer characteristics of nanorefrigerant and the cycle behavior of nanoparticles in the refrigeration system, the migration of nanoparticles during pool boiling was investigated experimentally. Weigh method is used in the present study. The research focuses on the influence of nanoparticle type and size, refrigerant type, mass fraction of lubricating oil, heat flux and initial liquidlevel height on the migration of nanoparticles during pool boiling. The experimental results show that the migration ratio of nanoparticles during the pool boiling of refrigerantbased nanofluid increases with the decrease of nanoparticle density, nanoparticle size, dynamic viscosity of refrigerant, mass fraction of lubricating oil or heat flux; while increases with the increase of liquidphase density of refrigerant or initial liquidlevel height.
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Received: 10 June 2012
Published: 28 May 2012
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