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Study on Heat Transfer Conductivity of Subcooled Heat Exchanger in High Temperature Superconducting Motor of Cooling System

Author: HeZhenZong
Tutor: ChenAnBin
School: Harbin Institute of Technology
Course: Refrigeration and Cryogenic Engineering
Keywords: HTS motor Subcooled liquid nitrogen Coil subcooler The heat pipe cooler
CLC: TK124
Type: Master's thesis
Year: 2011
Downloads: 57
Quote: 0
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Abstract


With the advent of high-temperature superconducting materials , superconducting technology applications rose from the liquid helium temperature to liquid nitrogen temperature zone . The HTS motor as an important application in the field of superconducting technology has been the concern of the research institutes at home and abroad , it is compared with the conventional motor has a high efficiency , low energy consumption , small size and light weight . Therefore , the high-temperature superconducting motor has a lot of applications market , will also be an important scientific and technological research in the 21st century countries . This article is based on the axis of Harbin Institute of Technology Electromagnetic and Electronic Technology Research Institute and the Institute of low temperature superconducting technology cooperation projects - the radial flux high temperature superconducting at low speed synchronous motor as the research object . Low temperature working fluid and materials suitable for the project through the study of different low - temperature working fluid physical properties and the physical properties of cryogenic engineering materials . Then given a thermal load on the HTS motor cryogenic cooling system , and determines the state parameters for each point of the liquid nitrogen cycle , and the cycle and draw temperature - entropy diagram . The subcooler coil type given first coefficient calculating method of the cold head heat exchanger and the subcooling heat exchanger , the corresponding heat transfer area is calculated according to the thermal load . Then analyzed various subcooler structure of the effect of heat transfer . In addition to the heat pipe cooler, the heat transfer coefficient of the cold head heat exchanger and subcooling heat exchanger design , by the total heat load calculated heat transfer area and the relevant dimensions of the heat pipe heat exchanger . By Fluent simulation subcooler outlet temperature of the heat-pipe type and subcooler coil preliminary comparison .

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CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Thermal Engineering Theory > Heat Transfer
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