R290在小管径水平微肋管内沸腾传热的实验研究

doi:10.11949/0438-1157.20190646

摘要/Abstract

摘要：

实验研究小管径水平微肋管内R290的两相流沸腾传热特性，分别在内径为4、6 mm，有效长度为900 mm的紫铜管内，得到R290在质量流量密度100～250 kg·m^-2·s^-1、饱和温度7～11℃、热通量13～24 kW·m^-2以及干度0.1～0.9范围内的沸腾传热系数；分析了质量流量密度、饱和温度、热通量、管型以及干度对R290沸腾传热系数及临界干度的影响。结果发现：沸腾传热系数随质量流量密度、饱和温度的增大而增加；随着热通量的增大，传热系数出现先增后减的现象；热通量越高，临界干度越小；微肋管相比于光滑管临界干度更大；且随着R290的沸腾汽化，干度逐渐增大并出现干涸现象，导致沸腾传热系数先增至一极值后降低。分别采用6种常用的沸腾传热关联式预测R290的沸腾传热系数，对比实验结果得出Fang等和Choi等的预测精度比较高。

关键词: R290, 微肋管, 沸腾, 相变, 流动, 传热, 预测

Abstract:

The boiling heat transfer characteristics of R290 in horizontal micro-fin copper tubes with inner diameter of 4mm and 6mm were investigated experimentally. And the effects of mass flux(100—250 kg·m^-2·s^-1),saturation temperature(7—11℃),heat flux(13—24 kW·m^-2) ,tube type and vapor quality(0.1—0.9) on the boiling heat transfer coefficient and critical quality were analyzed .The results showed that the boiling heat transfer coefficient increased with the increase of mass flux or saturation temperature. The boiling heat transfer coefficient increased at first but then decreased as the increase of heat flux. And the results also showed that critical quality decreased with the increase of heat flux. Comparing to the smooth tube, micro-fin had a larger critical quality. With the increase of vapor quality accompanied by the heat absorbing boiling process of R290, the boiling heat transfer coefficient increased at first but then decreased. Six commonly used correlations of boiling heat transfer were used to predict the boiling heat transfer coefficient of R290. Comparing with the experimental results, the prediction accuracy of Fanget al. and Choiet al. was higher.

Key words: R290, micro-fin tube, boiling, phase change, flow, heat transfer, prediction

中图分类号:

TB 6

王乐乐, 戴源德, 田思瑶, 林秦汉. R290在小管径水平微肋管内沸腾传热的实验研究[J]. 化工学报, 2020, 71(3): 1026-1034.

Lele WANG, Yuande DAI, Siyao TIAN, Qinhan LIN. Experimental investigation on characteristics of R290 boiling heat transfer in horizontal micro-fin tubes with small diameter[J]. CIESC Journal, 2020, 71(3): 1026-1034.

图/表 12

参考文献 32

1	Choudhari C S,Sapali S N.Performance investigation of natural refrigerant R290 as a substitute to R22 in refrigeration systems[J].Energy Procedia,2017,109:346-352.
2	Parikshit A L,Choudhari C S.Perspective of environmental friendly refrigeration propane(R290)[J].International Journal of Innovative Research in Science and Engineering,2016,2(3):748-753.
3	Liang J R,Li T X.Detailed dynamic refrigerant migration characteristics in room air-conditioner with R290[J].International Journal of Refrigeration,2017,88:108-116.
4	Teddy I O,Oluseyi O A.Thermal performance and energy consumption analyses of R290 and R22 refrigerants in air-conditioning system[J].Materials Science and Engineering,2018,43:1-9.
5	Vishakha S J,Ashok J K.Experimental performance study of R290 as an alternative to R22 refrigerant in a window air conditioner[J].Materials Science and Engineering,2018,13:1-8.
6	Hui L,Hong X.Study on Performances of refrigeration-type compressed-air dryers using environmentally-friendly refrigerants R717, R290 and R600a[J].Applied Mechanics and Materials,2014,672:1708-1711.
7	Kashif N,Bo S,Ahmed E,et al.R290(Propane) and R600a(isobutane) as natural refrigerants for residential heat pump water heaters[J].Applied Thermal Engineering,2017,127:870-883.
8	Zou S K,Dai Y D,He G G.Studies on phase change heat transfer of R290 and its refrigerant mixtures in horizontal tube[J].Chemical Industry and Engineering Progress,2016,35(11):3413-3420.
9	Zhou W J,Gan Z H.A potential approach for reducing the R290 charge in air conditioners and heat pumps[J].International Journal of Refrigeration,2019,20:1-14.
10	Nguyen B C,Pham Q V,Kwang-I1 C, et al.Boiling heat transfer of R32, CO2 and R290 inside horizontal minichannel[J].Energy Procedia,2017,105:4822-4827.
11	张慧晨,刘建华,徐小进,等.微细管内R290流动沸腾换热与干涸特性研究[J].能源工程,2016,6:1-5.
	Zhang H C,Liu J H,Xu X J,et al.Experimental study of the heat transfer and dryout for R290 flow boiling in micro-tubes[J].Energy Engineering,2016,6:1-5.
12	Jeferson D O,Jacqueline B C,Julio C P.Experimental investigation on flow boiling pressure drop of R290 and R600a in a horizontal small tube[J].International Journal of Refrigeration,2017,84:165-180.
13	周小清,柳建华,徐小进,等.微细通道内R290流动沸腾换热特性实验研究[J].热能动力工程,2017,32(4):38-42.
	Zhou X Q,Liu J H,Xu X J.Experimental study on flow boiling heat transfer characteristics of R290 in microchannel[J].Journal of Engineering for Thermal Energy and Power,2017,32(4):38-42.
14	Jiong T O,Pamitran A S,Kwang I C,et al.Experimental investigation on two-phase flow boiling heat transfer of five refrigerants in horizontal small tubes of 0.5, 1.5 and 3.0 mm inner diameters[J].International Journal of Heat and Mass Transfer,2011,54:2080-2088.
15	Lillo G R,Mastrullo A,Mauro W,et al.Flow boiling heat transfer, dry-out vapor quality and pressure drop of propane(R290): experimental and assessment of predictive methods[J].International Journal of Heat and Mass Transfer,2018,126:1236-1252.
16	Zan W,Bengt S D,Vishwas V W,et al.Heat transfer correlations for single-phase flow, condensation, and boiling in microfin tubes[J].Heat Transfer Engineering,2015,36:582-595.
17	Zou X,Gong M Q,Chen G F,et al.Experimental study on saturated flow boiling heat transfer of RE170/R290 mixtures in a horizontal tube[J].International Journal of Refrigeration,2010,33:371-380.
18	Li K Q,He G G,Jiang J K,et al.Flowing boiling heat transfer characteristics and pressure drop of R290/oil solution in smooth horizontal tubes[J].International Journal of Heat and Mass Transfer,2018,119:777-790.
19	He G G,Liu F,Cai D H,et al.Experimental investigation on flow boiling heat transfer performance of a new near azeotropic refrigerant mixture R290/R32 in horizontal tubes[J].International Journal of Heat and Mass Transfer,2016,102:561-573.
20	Zou X,Gong M Q,Chen G F,et al.Experimental study on saturated flow boiling heat transfer of R290/R152a binary mixtures in a horizontal tube[J].Energy Power Engineering,2010,4(4):527-534.
21	Jin S J,Wang X C,Ma X L,et al.Study on the performance of small tube diameter R290 fin-tube evaporator[J].Procedia Engineering,2017,205:1578-1583.
22	戴源德,林秦汉,邹思凯,等.R290在水平光滑管内的沸腾换热[J].化工学报,2017,68(9):3420-3426.
	Dai Y D,Lin Q H,Zou S K,et al.Boiling heat transfer performance of R290 in smooth horizontal tubes[J],CIESC Journal,2017,68(9):3420-3426.
23	杨世铭,陶文铨.传热学 [M].4版. 北京:高等教育出版社,2006:203.
	Yang S M,Tao W Q.Heat Transfer[M].4th ed.Beijing:Higher Education Press,2006:203.
24	杨春信,吴玉庭,袁修干,等.核态池沸腾中气泡生长和脱离的动力学特征——气泡的脱离直径与脱离频率[J].热能动力工程,1999,14(5):330-333.
	Yang C X,Wu Y T,Yuan X G,et al.Dynamic characteristics of bubble growth and departure in nucleate boiling—bubble departure diameter and frequency[J].Journal of Engineering for Thermal Energy and Power,1999,14(5):330-333.
25	欧阳新萍,陈静竹,李泰宇.3种管内强化管沸腾换热性能对比[J].化工学报,2015,66(6):2076-2081.
	Ouyang X P,Chen J Z,Li T Y.Boiling heat transfer performance in three internal enhanced tubes[J].CIESC Journal,2015,66(6):2076-2081.
26	司少娟,欧阳新萍,张连杰,等.T型沸腾强化换热管传热性能的实验研究[J].热能动力工程,2011,26(4):410-414.
	Si S J,Ouyang X P,Zhang L J.Experimental study of the heat transfer performance of a T-shaped fin boiling intensified heat exchange pipe[J].Journal of Engineering for Thermal Energy and Power,2011,26(4):410-414.
27	Choi K I,Pamitran A S,Oh J T,et al.Pressure drop and heat transfer during two-phase flow vaporization of propane in horizontal smooth minichannels[J].International Journal of Refrigeration,2009,32(5):837-845.
28	Fang X D,Wu Q,Yuan Y L.A general correlation for saturated flow boiling heat transfer in channels of various sizes and flow directions[J].International Journal of Heat and Mass Transfer,2016,107:972-981.
29	Pamitran A S,Choi K I,Oh J T,et al.Two-phase flow heat transfer of propane vaporization in horizontal minichannels[J].Journal of Mechanical Science and Technology,2009,23:599-606.
30	Bertsch S S,Groll E A,Garimella S V.A composite heat transfer correlation for saturated flow boiling in small channels[J].CTRC Research Publication,2009,52(7):2110-2118.
31	Cavallini A,Del C D,Doretti L,et al.Refrigerant vaporization inside enhanced tubes: a heat transfer model[J].Heat and Technology,1999,17(2):29-36.
32	Yun R,Kim Y C,Seo K J,et al.A generalized correlation for evaporation heat transfer of refrigerants in micro-fin tubes[J].International Journal of Heat and Mass Transfer,2002,45:2003-2010.

测量参数	测量仪表及型号	测量范围	误差
质量流量m_ref/(kg·h^-1)	DMF-1-1A/DX 科氏质量流量计	0~40	±0.2%
体积流量V_w/(L·min^-1)	LDY-S 电磁流量计	0.05～3.50	±0.5%
工质温度t_sat/℃	Pt100 电阻温度计	-50~200	±0.1℃
内管外壁温t_wo/℃	TT-T-30-SLE T型热电偶	-200~150	±0.1℃
压力p/MPa	Trafan8251 压力传感器	0～6	±0.3%

测量参数	测量仪表及型号	测量范围	误差
质量流量m_ref/(kg·h^-1)	DMF-1-1A/DX 科氏质量流量计	0~40	±0.2%
体积流量V_w/(L·min^-1)	LDY-S 电磁流量计	0.05～3.50	±0.5%
工质温度t_sat/℃	Pt100 电阻温度计	-50~200	±0.1℃
内管外壁温t_wo/℃	TT-T-30-SLE T型热电偶	-200~150	±0.1℃
压力p/MPa	Trafan8251 压力传感器	0～6	±0.3%

外径d_o/mm	内径d_i/mm	总壁厚δ/mm	底壁厚δ_w/mm	齿顶高度H_f/mm	齿顶角α/(°)	螺纹条数n	螺旋角β/(°)
5.00	4.00±0.03	0.50	0.35±0.03	0.15±0.02	40±5	65	18±2
7.00	6.00±0.03	0.50	0.35±0.03	0.15±0.02	40±5	65	18±2

外径d_o/mm	内径d_i/mm	总壁厚δ/mm	底壁厚δ_w/mm	齿顶高度H_f/mm	齿顶角α/(°)	螺纹条数n	螺旋角β/(°)
5.00	4.00±0.03	0.50	0.35±0.03	0.15±0.02	40±5	65	18±2
7.00	6.00±0.03	0.50	0.35±0.03	0.15±0.02	40±5	65	18±2

测试编号		体积流量/(L·min^-1)	进口温度/℃	出口温度/℃	比热容/(kJ·kg^-1·℃^-1)	密度/(kg·m^-3)	漏热率/%
1	热水	1.673	52.4	43.5	4.181	988.91	2.82
1	冷水	2.210	23.7	30.2	4.181	996.49	2.82
2	热水	1.552	53.2	43.3	4.181	988.78	2.30
2	冷水	2.224	24.0	30.7	4.181	996.38	2.30
3	热水	1.486	52.8	43.9	4.181	988.73	2.25
3	冷水	2.103	23.4	29.5	4.181	996.62	2.25