Experimental Investigation on Beat Transfer in the Manifolds of Refrigerating Compressors
نویسندگان
چکیده
In this study, a review and discussion has been made on the research work of heat transfer in manifolds previously done. Since it is difficult to determine the heat transfer coefficients in different areas of a suction or discharge chamber by using conventional methods, the mass transfer analogy -sublimation of naphthalene has been used to develop the heat transfer correlations for the four areas in a suction chamber. The mass transfer experiments were carried out on a model under the stable flow conditions with air as the medium. The correctness of the correlations has been verified through the measurement of U.e average heat transfer coefficient in the chamber. The maximum deviation of heat transfer coefficients measured from the correlations is within ±10%. project supported by the Science Fund of the Chinese Academy of Sci~nces 175 INTRODUCTION Since the 1970s, some work have been done to determine the manifold heat transfer coefficients in refrigerating compressors. J. M. Hughes (1) and Dang Jinquan (2) respectively presented the following heat transfer correlations for the valve passage, the suction chamber and the discharge chamber that they have used in their heat transfer experiments~ Hughes: Valve Passage o.i>3 0.6 Nu "" 1.48Re Pr
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