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U.S. ammonia refrigeration technology and related standards workshop held in Beijing

904,1502 W/m2 · K, can be found No. Overall heat transfer coefficient over 2 No. A big 9.9%, No. 3 more No. A large 11.5%, No. 3 more No. 2 large 1.5%. . 2) strengthen the surface of condensation heat transfer can get excellent performance in the same heat flux conditions jjjjjjjj, No. 1-3 tube heat transfer coefficient outside the tube are 7.0-8.8 times the light tube ,[link widoczny dla zalogowanych],9.0-10.8-fold ,9.9-12. Tone. 3) strengthening of pipe, the pipe inside and outside heat transfer coefficient has been close to, if the tube were also enhanced, you can further enhance the heat transfer performance. References l1lHondaH, TakataN, TakamatsuH. Condensationofdown. waId-flowingHFC134ainastaggeredbrindleofhorizontalfinnedtubes: effectoffingeometry [J]. InternationalJournal · Refrigeration,[link widoczny dla zalogowanych], 2O02 (25) :3-10l2] KumarR, VarmaHK, MohantyB, AgrawalKN. Conden-,,; ationofR - 134avaporoversinglehorizontalcircularinte. {A fintubeswithtrapezoidalfi, ~ EJ]. HeatTransferEnsi-neering,[link widoczny dla zalogowanych], 2O0o, 21 (2) :29-39 [3] Yang Shiming, Tao Wen-Quan. Heat Transfer (third edition) [M]. Beijing: Higher Education Press, 1998 [4] ChengB, TaoWQ. ExperimentalstudyofR152afdmCOrl · densationonsinglehorizontalsmoochtubeandenhancedtubes [J]. AEJ. ofHeatTransfer, 1994,116 (2) :266-270 [5] tungDS, KimCB, Hwang, KimKK. CondensationheattransfercoefficientsofR, R4o7C,[link widoczny dla zalogowanych], andR410Aonahorizontalplain, lowfin, andturbo-Ct, a ~ IJ]. Int. J. ofRefrigeration ,2003,26:485-491jjjj-site jjjjjjjLjjjjjjjjjjjj U.S. ammonia refrigeration technology and related standards workshop held in Beijing jjl1 15-16, by the China Institute of Refrigeration, Domestic Trade and Engineering Design and Research Institute, the National Standardization Technical Committee co-sponsored by refrigeration Sino-US technology and related standards for ammonia refrigeration Seminar standards and more than 5o of the exchange of experts. Chinese Association of Refrigeration, vice chairman and secretary general, domestic trade Engineering Design Research Institute Jin Jiawei opening speech, Deputy Secretary-General Qiu Zhongyue closing remarks. ASHRAE delegation of Chinese Association of Refrigeration access November 15, 2006 a 17, ASHRAE President-elect KentPeterson, ASHRAE thirteen district officials Mr. Zhao Wenhua, and Mr. Xu Jiaxiang row of three visits to China Refrigeration. Chinese Association of Refrigeration, vice chairman and secretary general Mr. Jin Jiawei, vice president Mr. Wu Yuanwei, Deputy Secretary-General and the Deputy Secretary-General, Mr. Qiu Zhongyue Jing Hua Chien attended the talks. The two sides signed the Memorandum of Understanding in April of specific provisions in further consultations, the two sides to strengthen technical exchange, member services, publications, sharing, etc. consensus, the Chinese Association of Refrigeration ASHRAE invited to send two experts in April 2007 in Guangzhou,[link widoczny dla zalogowanych], China Refrigeration Expo held during the energy-saving building system technology exchange. ASHRAE ASHRAE representatives and some members of Beijing held talks, the two sides on how to strengthen China's membership services were discussed. a 28 -

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