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An Experimental Study on Quantitative Interpretation of Local Convective Heat Transfer for the Fin and Tube Heat Exchanger Using Lumped Capacitance Method
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 Title & Authors
An Experimental Study on Quantitative Interpretation of Local Convective Heat Transfer for the Fin and Tube Heat Exchanger Using Lumped Capacitance Method
Kim, Ye-Yong; Kim, Gwi-Sun; Jeong, Gyu-Ha;
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 Abstract
An experimental study has been performed to investigate the heat transfer characteristics of fin and tube heat exchanger. The existing transient and steady methods are very difficult to apply for the measurements of heat transfer coefficients of a thin heat transfer model. In this study the lumped capacitance method was adopted. The heat transfer coefficients were measured by using the lumped capacitance method based on the liquid crystal thermography. The method is validated through impinging jet and flat plate flow experiments. The two experiments showed that the results of the lumped capacitance method with polycarbonate model showed very good agreements with those of the transient method with acryl model. The lumped capacitance method showed similar results regardless of the thickness of polycarbonate model. The method was also applied for the heat transfer coefficient measurements of a fin and tube heat exchanger. The quantitative heat transfer coefficients of the plate fin were successfully obtained. As the frontal velocity increased, the heat transfer coefficients were increased, but the color-band shape showed similar patterns regardless of frontal velocity.
 Keywords
Fin and Tube Heat Exchanger;Lumped Capacitance Method;Bi;Liquid Crystal;Convection Heat Transfer;
 Language
Korean
 Cited by
1.
감온액정을 이용한 Rayleigh-Bernard 대류의 정량적 가시화에 관한 연구,배대석;김진만;권오봉;이동형;이연원;김남식;

한국마린엔지니어링학회지, 2003. vol.27. 3, pp.395-404
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