Convection heat transfer research of supercritical R134a in mini-channel of tube

被引：0

作者：

Zhang Q. ^{[1
]}

Ma Z. ^{[1
]}

Yu Z. ^{[2
]}

Liu Z. ^{[1
]}

Huang B. ^{[1
]}

Yang Z. ^{[1
]}

Ma H. ^{[1
]}

机构：

[1] State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Shaanxi, Xi’an

[2] Qingdao Wobes Intelligent Experiment Technology Co., Ltd., Shandong, Qingdao

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2024年 / 43卷 / 04期

关键词：

fluid flow and heat transfer; heat transfer correlation; micro-channel; organic Rankine cycle; supercritical R134a;

D O I：

10.16085/j.issn.1000-6613.2023-1273

中图分类号：

学科分类号：

摘要：

The supercritical organic Rankine cycle (SORC) is an ideal new power cycle technology for recovering energy using supercritical organic Rankine cycle. The energy efficiency of the system is significantly affected by the SORC, the supercritical organic working medium, low grade energy recovery, and the heat transfer characteristics of the supercritical organic working medium. At present, it has become a bottleneck that restrict the development of organic Rankine cycle technology. To address this issue, the experimental studies were conducted on the flow heat transfer characteristics of supercritical R134a in a tiny channel with an inner diameter of 2mm). The parameters considered in the study were as follows: heat flux ranging from 60—120kW/(m2·s), mass flow rate from 800—3000kg/(m2·s), pressure from 4.1—5.1MPa, and working medium inlet temperature from 20—100℃. The effects of heat flow density, mass flow velocity, pressure and fluid temperature on the heat transfer characteristics were discussed. The results showed that the heat transfer coefficient initially increased and then decreased with the increase of fluid temperature. It also increased with the increase of mass flow rate but decreased with the increase of heat flux and pressure. According to the experimental data, a prediction accuracy of ± 10% for R134a in the microchannel was achieved, demonstrating good prediction accuracy. © 2024 Chemical Industry Press Co., Ltd.. All rights reserved.

引用

页码：1667 / 1675

页数：8

共 32 条

[11] JACKSON J D., Consideration of the heat transfer properties of supercritical pressure water in connection with the cooling of advanced nuclear reactors, Pacific Regional Nuclear Energy Conference, (2002)
[12] YANG Zenan, LUO Xiaobo, WANG Ge, Et al., Numerical study on the effects of supercritical CO2-based nanofluid on heat transfer deterioration, Numerical Heat Transfer A: Applications, 82, 5, pp. 193-216, (2022)
[13] YUN Rin, HWANG Yunho, RADERMACHER Reinhard, Convective gas cooling heat transfer and pressure drop characteristics of supercritical CO2/oil mixture in a minichannel tube, International Journal of Heat and Mass Transfer, 50, 23, pp. 4796-4804, (2007)
[14] GU Hongfang, LI Hongzhi, WANG Haijun, Et al., Experimental investigation on convective heat transfer from a horizontal miniature tube to methane at supercritical pressures, Applied Thermal Engineering, 58, 1, pp. 490-498, (2013)
[15] JIANG Peixue, ZHAO Chenru, SHI Runfu, Et al., Experimental and numerical study of convection heat transfer of CO2 at super-critical pressures during cooling in small vertical tube, International Journal of Heat and Mass Transfer, 52, 21, pp. 4748-4756, (2009)
[16] DANG Chaobin, HIHARA Eiji, Numerical study on in-tube laminar heat transfer of supercritical fluids, Applied Thermal Engineering, 30, 13, pp. 1567-1573, (2010)
[17] DANG Chaobin, HIHARA Eiji, In-tube cooling heat transfer of supercritical carbon dioxide. Part 1. Experimental measurement, International Journal of Refrigeration, 27, 7, pp. 736-747, (2004)
[18] YOON Seok Ho, KIM Ju Hyok, HWANG Yun Wook, Et al., Heat transfer and pressure drop characteristics during the in-tube cooling process of carbon dioxide in the supercritical region, International Journal of Refrigeration, 26, 8, pp. 857-864, (2003)
[19] FENG Longlong, ZHONG Ke, ZHANG Yusen, Et al., Flow boiling heat transfer characteristics of R1234yf in horizontal microchannel, Chemical Industry and Engineering Progress, 41, 7, pp. 3502-3509, (2022)
[20] YANG Meng, ZHANG Hua, QIN Yanbin, Et al., Thermodynamic performance comparison and experimental study of mixed refrigerant R134a/R1234yf(R513A) and R134a, Chemical Industry and Engineering Progress, 38, 3, pp. 1182-1189, (2019)

← 1 2 3 4 →