Paper Infomation
Evaporating Heat Transfer Characteristics of R123 in a Double–pipe Evaporator
Full Text(PDF, 852KB)
Author: Mingjun Zhou, Jingfu Wang, Xinxin Zhang
Abstract: In this paper, flow boiling heat transfer characteristics of R123 inside a double-pipe evaporator at two different saturation pressure, 0.152MPa and 0.2MPa, are experimentally investigated with various mass flow rates of working fluid, different heat fluxes and various vapor qualities. Under the same experimental condition, flow boiling heat transfer coefficients are calculated using Shah’s correlation, Gungor-Winterton’s correlation and Kandlikar’s correlation. The investigation results show that flow boiling heat transfer coefficient increases as the working fluid mass flow rate increases, when the saturation pressure and heat fluxes are constant. It also increases as the heat flux increases, when the saturation pressure and mass flow rate are constant. And it increases as the saturation pressure increases, when the heat fluxes and mass flow rate are constant. However, it increases first and then decreases as the vapor quality increases. Comparing the heat transfer coefficient of experimental results with that correlation values using Shah’s correlation, Gungor-Winterton’s correlation and Kandlikar’s correlation, it can be seen that the experimental results have a good agreement with Kandlikar’s correlation.
Keywords: R123; Flow; Heat Transfer; Mass Flow Rate; Evaporation; Correlation
References:
[1]Yang Shiming, Tao Wenquan. Heat Transfer[M]. Beijin:Higher Education Press, 2006, 243-327.
[2]Wu Yezheng. Refrigeration and cryogenic technology principle[M]. Beijing:Higher Education Press, 2007, 186-192.
[3]Guo Dongqi, Wang Huaixin, Pan Lisheng. Experimental research of Organic Rankine Cycle power system device by waste heat sources[J]. Acta energiae solaris sinica, 2015, 36(6): 1325-1330.
[4]Liu Jian, Wang Huitao, Zhang Songyuan, et al. Thermal performance comparative study of R123 and R245fa for Organic Rankine Cycle[J]. Renewable Energy Resources, 2016, 34(1): 112-117.
[5]J.P. Roy, Ashok Misra. Parametric optimization and performance analysis of a regenerative Organic Rankine Cycle using R-123 for waste heat recovery [J]. Energy, 2012, (39): 227-235.
[6]Chi-chuan Wang, Ching-shan Chiang. Two-phase heat transfer characteristics for R-22/R-407C in a 6.5-mm smooth tube[J]. International Journal of Heat and Fluid Flow, 1997, 18(6): 550-558.
[7]Xu jijun, Jia Dounan. Boiling heat transfer and gas-liquid two phase flow[M]. Beijing:Atomic Energy Press, 1993, 467-476.
[8]M.M. Shah. Chart correlation for saturated boiling heat transfer equations and further study[J]. ASHREA Transaction, 1982, (88): 185-196.
[9]K.E. Gungor, R.H.S. Winterton. A general correlation for flow boiling in tubes and annuli[J]. International Journal of Heat and Mass Transfer, 1986, (29): 351-358.
[10]Kandlikar S G. A general correlation for saturated two-phase flow boiling heat transfer inside horizontal and vertical tubes[J]. Journal of Heat Transfer, 1990, (112): 219-288.
[11]H.S. Lee, J.I. Yoon, J.D. Kim, et al. Evaporating heat transfer and pressure drop of hydrocarbon refrigerants in 9.52 and 12.70 mm smooth tube[J]. International Journal of Heat and Mass Transfer, 2005, (48): 2351-2359.
[12]J.C. Chen. A correlation for boiling heat transfer to saturated fluids in vertical flow[J]. Heat Transfer Engineering, 1966, 1(4): 32-37.
[13]J.C. Collier, J.R. Thome. Convective Boiling and Condensation[J]. Third Ed., Oxford Science Publications, 1994.