紧凑通道内CO2/润滑油混合物沸腾换热特性研究

doi:10.11949/j.issn.0438-1157.20181442

摘要/Abstract

摘要：

为了测试润滑油对二氧化碳流动沸腾换热特性的影响，对外径6 mm、内径4 mm紧凑通道内的CO₂/润滑油混合物的换热进行实验研究。实验工况为质量流量2.74～5.61 kg·h^-1,饱和温度-4～8℃，热通量3.2～5 kW·m^-2，油浓度0～6%。结果表明：润滑油浓度越大，CO₂的局部传热系数越小；含1.5%油浓度相对于无油工况下平均传热系数下降了约42.4%; 传热系数随热通量、饱和温度的升高而增加，干涸后随着质量流量的增加传热系数增加；干涸随油浓度的增加、热通量的减小、饱和温度的升高、质量流量的增加而延迟；干涸特性对传热系数有显著影响，干涸阶段占整个换热过程的35.4%。

关键词: 二氧化碳, 润滑油, 传热, 混合物, 紧凑通道, 干涸特性

Abstract:

To test the effect of lubricating oil on the boiling heat transfer characteristics of carbon dioxide flow, the heat transfer of CO₂/lubricating oil mixture in a compact channel with an outer diameter of 6 mm and an inner diameter of 4 mm was experimentally studied at mass flow rate of 2.74—5.61 kg·h^-1, saturation temperature of -4—8℃, heat flux of 3.2—5 kW·m^-2 and oil concentration of 0—6%. The results show that the higher the concentration of lubricating oil, the smaller the local heat transfer coefficient of CO₂ and the delay of dryout. The average heat transfer coefficient with 1.5% oil concentration was reduced by about 42.4% compared with that without oil. With the increase of mass flow rate, the initial dryness of drying increased, and the heat transfer coefficient increased with the increase of mass flow rate. The heat transfer coefficient increases with the increase of heat flux and saturation temperature. Dryout is delayed with decreasing heat flux and increasing saturation temperature. Dryout characteristics have significant influence on heat transfer coefficient, and dryout stage accounts for 35.4% of the whole heat transfer process.

Key words: carbon dioxide, lubricating oil, heat transfer, mixtures, compact channel, dryout characteristics

中图分类号:

TK 12

杨俊兰, 宁淑英. 紧凑通道内CO₂/润滑油混合物沸腾换热特性研究[J]. 化工学报, 2019, 70(5): 1772-1778.

Junlan YANG, Shuying NING. Study on boiling heat transfer characteristics of CO₂/ lubricating oil mixture in mini-channel tube[J]. CIESC Journal, 2019, 70(5): 1772-1778.

图/表 8

图1 实验系统原理

Fig.1 Principle diagram of experimental system

图2 测试段及测试管

Fig.2 Test section and test tube

表1 设备特性

Table 1 Device characteristics

设备	型号	测试精度	规格
注油器	自制	± 0.1ml	>10 MPa
Pt热电阻	HH-WZPK	± 0.01℃	-200~500℃
压力传感器	CS-pt100	± 0.5%FS	0~10 MPa
质量流量计	HQ915	± 0.3	0~9 kg·h^-1

图3 不同干度下油浓度对传热系数的影响

Fig.3 Influence of oil concentrations on heat transfer coefficient with different dryness

图4 饱和温度对传热系数的影响

Fig.4 Influence of saturation temperature on heat transfer coefficient

图5 热通量对传热系数的影响

Fig.5 Influence of heat flux on heat transfer coefficient

图6 质量流量对传热系数的影响

Fig.6 Influence of mass flow rate on heat transfer coefficient

表2 不同换热过程平均传热系数对比

Table 2 Comparison of average heat transfer coefficients in different heat transfer processes

总过程平均传热系数/(kW·m^-2·K^-1)	干涸前平均传热系数/(kW·m^-2·K^-1)	干涸过程平均传热系数/(kW·m^-2·K^-1)	干涸后平均传热系数/(kW·m^-2·K^-1)
2.726	4.047	2.796	1.083
1.506	2.132	1.699	0.869
1.584	2.621	1.841	0.595
2.678	4.338	2.524	0.636
平均影响因子	0.515	0.354	0.131

参考文献 30

1	司春强, 刘小朋, 林楚桂, 等 . 跨临界CO₂制冷循环火用分析[J]. 节能技术, 2012, 30(5): 455-457.
	Si C Q , Liu X P , Lin C G , et al . Exergy analysis of cross - critical CO₂ refrigeration cycle [J]. Energy-saving Technology, 2012, 30(5): 455-457.
2	廖小花, 陈海平, 李京茂 . IGCC系统控制CO₂排放的研究进展[J]. 节能技术, 2010, 28(5): 458-462.
	Liao X H , Chen H P , Li J M . Research progress of IGCC system for CO₂ emission control[J]. Energy-saving Technology, 2010, 28(5): 458-462.
3	金听祥, 徐冉, 李改莲, 等 . HFO-1234yf在空调系统中应用研究进展[J]. 制冷技术, 2014, 42(5): 63-69.
	Jin T X , Xu R , Li G L , et al . Advances in the application of HFO-1234yf in air-conditioning system[J]. Refrigeration Technique, 2014, 42(5): 63-69.
4	Nguyen B C , Pham Q V , Kwang-I 1 C, et al . Boiling heat transfer of R32, CO₂ and R290 inside horizontal minichannel [J]. Energy Procedia, 2017, 105: 4822-4827.
5	Wang R Z , Li Y . Perspectives for natural working fluids in China[J]. International Journal of Refrigeration, 2007, (30): 568-581.
6	Dang C B , Haraguchi N , Hihara E . Flow boiling heat transfer of carbon dioxide inside a small-sized microfin tube[J]. Int. J. Refrigeration, 2010, 33(4): 655-663.
7	马虎根, 胡自成 . 非共沸混合物微通道内流动沸腾特性[J]. 化工学报, 2006, 57(3): 526-529.
	Ma H G , Hu Z C . Flow boiling characteristics of non azeotropic mixtures in microchannels[J]. Journal of Chemical Industry and Engineering(China), 2006, 57(3): 526-529.
8	Wei L , Zan W . A general correlation for evaporative heat transfer in micro/mini-channels[J]. International Journal of Heat and Mass Transfer, 2010, 53(4): 1778-1787.
9	Ducoulombie M , Colasson S . Carbon dioxide flow boiling in a single microchannel(Ⅰ): Heat transfer[J]. Experimental Thermal and Fluid Science, 2011, 35(4): 597-611.
10	付涛涛, 朱春英, 王东继 . 微通道内气液传质特性[J]. 化工进展, 2011, 30(s2): 95-98.
	Fu T T , Zhu C Y , Wang D J . Gas-liquid mass transfer characteristics in microchannels[J]. Chemical Industry and Engineering Progress, 2011, 30(s2): 95-98.
11	胡静, 杨俊兰, 杜明星 . CO₂-润滑油水平光滑管内流动芬腾换热特性[J]. 煤气与热力, 2013, 4(4): 13-17.
	Hu J , Yang J L , Du M X . Fenten heat transfer characteristics of CO₂- lubricating oil flowing in horizontal smooth pipe[J]. Gas and Heat, 2013, 4(4): 13-17.
12	许文杰, 李敏霞, 郭强 . 润滑油对超临界二氧化碳对流换热特性的影响[J]. 化工学报, 2018, 69(5): 1982-1988.
	Xu W J , Li M X , Guo Q . Influence of lubricating oil on supercritical carbon dioxide convection heat transfer characteristics[J]. CIESC Journal, 2018, 69(5): 1982-1988.
13	Dang C B , Haraguchi N , Yamada T . Effect of lubricant oil on boiling heat transfer of carbon dioxide[C]//Proceeding of 7th IR-Gustav Lorentzen Conference.Trondheim, Norway, 2006: 495-498.
14	Dang C B , Haraguchi N , Yamada T , et al . Effect of lubricating oil on flow boiling heat transfer of carbon dioxide[J]. International Journal of Refrigeration, 2013, 36(1): 136-144.
15	Li M X , Dang C B , Hihara E . Flow boiling heat transfer of carbon dioxide with PAG-type lubricating oil in pre-dryout region inside horizontal tube[J]. International Journal of Refrigeration, 2014, 41(5): 45-49.
16	Wetzel M , Dietrich B , Wetzel T . Influence of oil on heat transfer and pressure drop during flow boiling of CO₂ at low temperatures[J]. Experimental Thermal and Fluid Science, 2014, 59: 202-212.
17	Gao L , Honda T , Koyama S . Experiments on flow boiling heat transfer of almost pure CO₂ and CO₂-oil mixtures in horizontal smooth and microfin tubes[J]. HVAC＆R Research, 2007, 13(3): 415-425.
18	Gao L , Honda T . Flow and heat transfer characteristics of refrigerant and PAG oil in the evaporator of a CO₂ heat pump system[C]//Proceedings of 7th ǁR-Gustav Lorentzen Conference.Trondheim, Norway, 2006: 491-494.
19	Zhao Y , Molki M , Ohadi M M , et al . Flow boiling of CO₂ with miscible oil in microchannels[J]. ASHRA Transactions, 2002, 108: 135-144.
20	Bansal P . In-tube boiling heat transfer of CO₂-lubricant mixture at low temperatures: preliminary results[J]. ASHRAE Transactions, 2011, 117: 186-194.
21	Ono T , Gao L , Honda T . Heat transfer and flow characteristics of flow boiling of CO₂-oil mixtures in horizontal smooth and micro-fin tubes[J]. Heat Transfer—Asian Research, 2010, 39(3): 195-207.
22	Dong H W , Young S C . The Effect of lubricant oil concentration on the performance of a gas cooler using carbon dioxide[J]. Journal of Thermal Science and Technology, 2012, 7(4): 577-588.
23	吴昊, 柳建华, 张良, 等 . CO₂微细通道流动沸腾换热干涸特性[J]. 化工学报, 2015, 66(5): 1676-1682.
	Wu H , Liu J H , Zhang L , et al . Characteristics of CO₂ micro-channel flow boiling heat transfer and drying[J]. CIESC Journal, 2015, 66(5): 1676-1682.
24	Dang C B , Lino K , Fukuoka K , et al . Effect of lubricating oil on cooling heat transfer of supercritical carbon dioxide[J]. International Journal of Refrigeration, 2007, 30(4): 724-731.
25	Dang C B , Lino K , Hihara E . Study on two-phase flow pattern of supercritical carbon dioxide with entrained PAG-type lubricating oil in a gas cooler[J]. International Journal of Refrigeration, 2008, 31(7): 1265-1272.
26	Dang C B , Hoshika K , Hihara E . Effect of lubricating oil on the flow and heat-transfer characteristics of supercritical carbon dioxide[J]. International Journal of Refrigeration, 2012, 35(5): 1410-1417.
27	Dang C B , Hihara E . Predicting the cooling heat transfer coefficient of supercritical CO₂ with a small amount of entrained lubricating oil by using the neural network method[J]. International Journal of Refrigeration, 2012, 35(4): 1130-1138.
28	Mehendale S S , Tacobi A M , Shah R K , et al . Fluid flow and heat transfer at micro-and meso-scales with application to heat exchanger design[J]. Applied Mechanics Reviews, 2000, 53(7): 175-193.
29	胡海涛 . R410A-润滑油混合物管内流动沸腾换热和压降特性的研究[D]. 上海: 上海交通大学, 2008: 24-28.
	Hu H T . Study on flow boiling heat transfer and pressure drop characteristics in R410A- lubricating oil mixture[D]. Shanhai: Shanghai Jiao Tong University, 2008: 24-28.
30	Ayad F , Benelmir R , Souayed A . CO₂ evaporators design for vehicle HVAC operation[J]. Applied Thermal Engineering, 2012, 36: 330-344.

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紧凑通道内CO₂/润滑油混合物沸腾换热特性研究

Study on boiling heat transfer characteristics of CO₂/ lubricating oil mixture in mini-channel tube

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