In order to improve the convective boiling heat transfer of R410A,the micro-fin tube was used to enhance heat transfer.The experimental studies on the horizontal micro-fin tube and smooth tube were conducted by using ...In order to improve the convective boiling heat transfer of R410A,the micro-fin tube was used to enhance heat transfer.The experimental studies on the horizontal micro-fin tube and smooth tube were conducted by using R410A as the working fluid.Several factors affecting heat transfer coefficients were analyzed, such as mass flux, heat flux, and quality.The circumferential wall temperature variation of the testing tubes with R410A as the working fluid was observed and analyzed.The heat transfer enhancement factor of the micro-fin tube against the smooth tube was about 1.6 to 2.2.The preliminary experiment data were useful for further research.展开更多
Using near-azeotropic refrigerant R410A as the working fluid, the experimental studies on the horizontal micro-fin tubes were conducted. Several factors affecting heat transfer coefficients were analyzed, and the char...Using near-azeotropic refrigerant R410A as the working fluid, the experimental studies on the horizontal micro-fin tubes were conducted. Several factors affecting heat transfer coefficients were analyzed, and the characteristics of flow boiling of the refrigerant in the horizontal micro-fin tubes were discussed. The local heat transfer coefficients increase with mass flux, heat flux and quality. And the heat transfer enhancement factor of those testing tubes is about 1.6 to 2.2.展开更多
文摘In order to improve the convective boiling heat transfer of R410A,the micro-fin tube was used to enhance heat transfer.The experimental studies on the horizontal micro-fin tube and smooth tube were conducted by using R410A as the working fluid.Several factors affecting heat transfer coefficients were analyzed, such as mass flux, heat flux, and quality.The circumferential wall temperature variation of the testing tubes with R410A as the working fluid was observed and analyzed.The heat transfer enhancement factor of the micro-fin tube against the smooth tube was about 1.6 to 2.2.The preliminary experiment data were useful for further research.
基金Shanghai Leading Academic Discipline Project(No.T0503)
文摘Using near-azeotropic refrigerant R410A as the working fluid, the experimental studies on the horizontal micro-fin tubes were conducted. Several factors affecting heat transfer coefficients were analyzed, and the characteristics of flow boiling of the refrigerant in the horizontal micro-fin tubes were discussed. The local heat transfer coefficients increase with mass flux, heat flux and quality. And the heat transfer enhancement factor of those testing tubes is about 1.6 to 2.2.
