Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 17    No. 5    October 2007

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Performances of electrically heated microgroove vaporizers
TANG Yong(汤 勇), PAN Min-qiang(潘敏强), LU Long-sheng(陆龙生), LIU Xiao-qing(刘晓晴)

School of Mechanical Engineering, South China University of Technology, Guangzhou 510640, China

Abstract:An electrically heated microgroove vaporizer was proposed. The vaporizer mainly comprised an outer tube, an inner tube and an electrical heater cartridge. Microgrooves were fabricated on the external surface of the inner tube by micro-cutting method, which formed the flow passage for fluid between the external surface of the inner tube and the internal surface of the outer tube. Experiments related to the temperature rise response of water and the thermal conversion efficiency of vaporizer were done to estimate the influences of microgroove’s direction, feed flow rate and input voltage on the performances of the vaporizer. The results indicate that the microgroove’s direction dominates the vaporizer performance at a lower input voltage. The longitudinal microgroove vaporizer exhibits the best performances for the temperature rise response of water and thermal conversion efficiency of vaporizer. For a moderate input voltage, the microgroove’s direction and the feed flow rate of water together govern the vaporizer performances. The input voltage becomes the key influencing factor when the vaporizer works at a high input voltage, resulting in the similar performances of longitudinal, oblique and latitudinal microgroove vaporizers.


Key words: microgroove; microchannel; vaporizer; electrical heating

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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