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Study on Fabrication and Properties Used for Heat Transfer of Porous Fiber Metals

Author: ZhiHao
Tutor: ZuoZhengPing；TangHuiPing
School: Xi'an University of Architecture and Technology
Course: Materials Science
Keywords: A porous metal fiber material Sintering Heat transfer enhancement Pool boiling
CLC: TQ343.2
Type: Master's thesis
Year: 2009
Downloads: 45
Quote: 0
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Abstract


The heat transfer is a common phenomenon in our lives , is the common problems faced by modern industry in various fields . With the rapid development of the world economy , conventional energy sources is declining , and the people in the development of new energy and pay more attention to energy conservation . Heat transfer enhancement is a newly developed highly efficient heat transfer technology , has a high heat transfer efficiency , has become an important topic in the field of heat transfer research . Enhanced heat transfer technology , enhanced heat transfer material is to strengthen an important aspect in the field of heat transfer . Enhanced heat transfer material , metal fiber has become a unique advantage of the good prospects of development of the heat exchanger material . Now most of the porous metal surface by flame spraying method , the method of machining , composite method , powder sintering method and orderly wire mesh sintering process , the porous metal fiber material for heat transfer enhancement is an important research direction in the field of heat transfer , Preparation for sintered metal fiber SYSTEM little heat transfer with a metal porous material . In this paper, the heat transfer with a metal fiber porous material sintering process parameters , focus on stainless steel and copper metal fiber porous material preparation process , to explore optimum sintering temperature of the two materials . The experiment worked out a complete set of sintered Shop system from raw materials → → → finishing → ??finished product suitable porous metal fiber material preparation process . The metal fiber surface of the porous material prepared using this method non-polluting, the binding between the fibers closely uniform internal pore structure of materials . In this thesis focuses on the material and structural parameters of porous metal fiber material pool boiling heat transfer performance . The results showed that the porous material of the metal fibers prepared to have a high heat transfer performance, the heat transfer effect with the light receiving surface can be increased by 6 times smaller than the maximum ; the heat transfer performance of the porous material of the metal fibers at atmospheric pressure is not supplied with fiber wire diameter and material thickness change was incremented or decremented ; under a porosity of 80 to 90% high porosity , the heat transfer performance of the porous material of the metal fibers is enhanced with decreasing porosity , preferably 80% of the heat transfer effects . The paper has important reference value for the research and development of high efficiency heat exchanger .

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CLC: > Industrial Technology > Chemical Industry > The chemical fiber industry > Inorganic fibers > Metal fiber
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