所属单位：建筑设备科学与工程学院

发表刊物：International Journal of Refrigeration

关键字：Falling film evaporation; Boiling heat transfer; Refrigerant; Enhanced tube; R123; Cross vapor stream

摘要：The falling film evaporation and the effect of cross vapor stream in falling film evaporator with triangular tube bundle using R123 was experimentally investigated. The variations of local and bundle average heat transfer coefficients were described. The tube bundle consisted of 4 x 3 (column x row) of triangular horizontal copper tubes. The tests without vapor effect were conducted with nominal heat fluxes of 20 to 60 kWm(-2), saturation temperatures of 6 to 16 degrees C and film flow rates of 0.016 to 0.18 kgm(-1) s(-1). Cross vapor stream effect experiments were operated at three heat fluxes of 20, 30 and 40 kWm(-2) and two film flow rates of 0.035 and 0.07 kgm(-1) s(-1), and the vapor velocity at the narrowest interstice in the tube bundle varies from 0 to 5.0 ms(-1). It is indicated that the heat transfer is seriously influenced by the bundle effect while less affected by changing of saturation temperature. With the increase in vapor velocity, the heat transfer performance is generally weakened; the cross vapor stream has a strong influence on falling film evaporation of R123. (C) 2020 Elsevier Ltd and IIR. All rights reserved.

合写作者：冀文涛,靳蒲航,李安桂,樊菊芳,Shun Yoshioka

第一作者：赵创要

论文类型：期刊论文

通讯作者：赵创要,陶文铨

卷号：112/44-55

ISSN号：0140-7007

是否译文：否

发表时间：2020-01-01