EXPERIMENTAL INVESTIGATION FOR NUCLEATE POOL BOILING HEAT TRANSFER CHARACTERISTICS OF δ-Al2O3—R141B NANOFLUID
In this paper, thermal performance of nanofluids in nucleate pool boiling is experimentally investigated on a horizontal flat square cooper surface under atmospheric pressure. The edge length of the square surface is 20mm, and the surface roughness is controlled by sanding with 2000＃ sandpaper. The nanofluids are engineered by dispersing the δ-aluminium-oxide nanoparticle in the base fluid refrigerant 141B in 0.001％,0.01％ and 0.1％ volume concentrations. Nucleate pool boiling curves of base fluid and nanofluids are obtained and compared with each other. The results show that the additional nanoparticles enhanced boiling heat transfer of fluids, and the enhancement is increased follow with the increasing of volume concentration. The heat transfer coefficient averagely increased 50.2％ in 0.1％ volume concentration compared with the pure fluid, under series heat flux range of 30-130kW/m2. The datum of pure R141b and the nanofluids in 0.001％ volume concentration correspond closely with Rhosenow correlation, the maximal relative error is less than 13％. In higher concentration nanofluids, the correlation is no longer applicable.
nanofluids nucleate pool boiling heat transfer coefficient deposition.
Xiao Tang Yan-Hua Diao Yao-Hua Zhao Ji Zhang
College of Architectural and Civil Engineering, Beijing University of Technology,Beijing, China, 100 College of Architectural and Civil Engineering, Beijing University of Technology, Beijing, China, 10
国际会议
The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)
北京
英文
516-522
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）