Nucleate pool boiling heat transfer characteristics of TiO2-water nanofluids at very low concentrations

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Suriyawong A., Wongwises S.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2010

วารสาร: Experimental Thermal and Fluid Science (0894-1777)

Volume number: 34

Issue number: 8

หน้าแรก: 992

หน้าสุดท้าย: 999

จำนวนหน้า: 8

นอก: 0894-1777

eISSN: 1879-2286

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-77956176009&doi=10.1016%2fj.expthermflusci.2010.03.002&partnerID=40&md5=a9cdd32b81ac9778da5260b921b06da7

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

A study of nucleate pool boiling heat transfer of TiO2-water nanofluids is experimentally conducted. Nanofluids with various concentrations of 0.00005, 0.0001, 0.0005, 0.005, and 0.01vol.% are employed. Horizontal circular plates made from copper and aluminium with different roughness values of 0.2 and 4μm are used as heating surfaces. The experiments are performed to explore the effects of nanofluids concentration as well as heating surface material and roughness on nucleate pool boiling characteristics and the heat transfer coefficient under ambient pressure. The results show that based on the copper heated surface which is tested with a concentration of 0.0001vol.%, higher nucleate pool boiling heat transfer coefficient is obtained when compared with the base fluid. A 15% increase is obtained for the surface roughness of 0.2μm and a 4% increase is obtained for roughness of 4μm. For concentrations higher than 0.0001vol.%, however, the higher the concentration, the lower the heat transfer coefficient. In the case of aluminium heated surface, the corresponding heat transfer coefficients are larger than for the copper surface by around 30% with a roughness of 0.2μm and around 27% with a roughness of 4μm. Moreover, the results also indicate that the heat transfer coefficient obtained based on a roughness of 4μm is higher than that for a roughness of 0.2μm by around 12% for aluminium and by around 13% for copper. © 2010.

คำสำคัญ

Heat flux, nanoparticles, Nucleate boiling