Performance experiments on absorption refrigeration cycle with ionic liquid-based working pairs

doi:10.16085/j.issn.1000-6613.2017-1687

Chemical Industry and Engineering Progress ›› 2018, Vol. 37 ›› Issue (07): 2524-2530.DOI: 10.16085/j.issn.1000-6613.2017-1687

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Performance experiments on absorption refrigeration cycle with ionic liquid-based working pairs

ZHAO Zongchang¹, SU Chengrui¹, ZHANG Xiaodong²

1 School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;
2 School of Chemical Machinery and Safety Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

Received:2017-08-09 Revised:2017-08-31 Online:2018-07-05 Published:2018-07-05

离子液体基工质对的吸收制冷循环性能实验研究

赵宗昌¹, 苏成睿¹, 张晓冬²

1 大连理工大学化工学院, 辽宁大连 116024;
2 大连理工大学化工机械与安全工程学院, 辽宁大连 116024

通讯作者: 赵宗昌(1955-),男,教授,博士生导师,从事吸收热泵理论和工业化应用研究。
作者简介:赵宗昌(1955-),男,教授,博士生导师,从事吸收热泵理论和工业化应用研究。E-mail:zczhao@dlut.edu.cn
基金资助:
国家自然科学基金项目（51376036）。

Abstract

Abstract: The performance test of the absorption refrigeration cycle with ionic liquid, 1-ethyl-3-methylimidazolium diethylphosphate[Emim] [DEP]-based binary working pairs[Emim] [DEP]+ H₂O and ternary working pairs LiBr+[Emim] [DEP] + H₂O were conducted in order to evaluate the refrigeration effects of this new ionic liquid-based working pairs. The experiment results showed that the ionic liquid-based working pairs[Emim] [DEP]+H₂O was capable of refrigeration. Compared with the working pairs LiBr+H₂O,[Emim] [DEP]+H₂O lowered the performance coefficient of refrigeration cycle due to its lower thermal conductivity and higher viscosity which led to absorbing water steam ability of[Emim] [DEP]+H₂O in absorber more weak under the same size of absorber. When the generation temperature and cooling water temperature were 90℃ and 30℃, respectively, the evaporation temperature was in the range of 10 to 15℃, the performance coefficient of refrigeration cycle varied from 0.16 to 0.28. In order to enhance the absorbing ability to water steam in absorber and consequently to real performance of absorption refrigeration cycle, small amount of solution LiBr+ H₂O was added into the[Emim] [DEP]+H₂O and constituted ternary working pairs LiBr+[Emim] [DEP]+H₂O,the experiment results showed that the performance coefficient of refrigeration cycle of ternary working pairs LiBr+[Emim] [DEP]+H₂O was superior to that of[Emim] [DEP] + H₂O, and varied from 0.17 to 0.34 when the evaporation temperature was in the range of 10℃ to15℃.

Key words: absorption refrigeration, performance coefficient, ionic liquids-based working pairs, ternary working pairs, performance enhancement

摘要： 分别对以离子液体1-乙基-3-甲基咪唑磷酸二乙酯[Emim][DEP]为吸收剂的二元工质对[Emim][DEP]+H₂O和以[Emim][DEP]+LiBr为吸收剂的三元工质对LiBr+[Emim][DEP]+H₂O的吸收制冷循环性能进行了实验研究，用于评价这种新型的工质对的制冷性能。实验结果表明，二元工质对[Emim][DEP]+H₂O具有吸收制冷性能，但与LiBr+H₂O工质对相比，其制冷系数较低。当发生温度为90℃、循环水温度为30℃、蒸发温度在10～15℃时，制冷系数仅为0.16～0.28。主要原因是[Emim][DEP]+H₂O工质对具有较高的黏度和较低的热导率，导致吸收器降膜吸收传热系数较低，吸收器吸收水蒸气的能力不足。为了强化其制冷效果，在[Emim][DEP]+H₂O工质溶液中加入少量LiBr水溶液，构成三元工质对LiBr+[Emim][DEP]+H₂O。实验结果表明，三元工质对LiBr+[Emim][DEP]+H₂O的制冷性能优于二元工质对[Emim[DEP]+H₂O，在上述蒸发温度范围内，制冷系数能够达到0.17～ 0.34，并且制冷温度更低。

关键词: 吸收制冷, 制冷系数, 离子液体基工质对, 三元工质对, 性能强化

CLC Number:

TB61⁺6

ZHAO Zongchang, SU Chengrui, ZHANG Xiaodong. Performance experiments on absorption refrigeration cycle with ionic liquid-based working pairs[J]. Chemical Industry and Engineering Progress, 2018, 37(07): 2524-2530.

赵宗昌, 苏成睿, 张晓冬. 离子液体基工质对的吸收制冷循环性能实验研究[J]. 化工进展, 2018, 37(07): 2524-2530.

References

[1] KIM K S, PARK S Y, CHOI S, et al. Vapor pressure of the 1-butyl-3-methylimidazolium bromide+water, 1-butyl-3-methylimidazolium tetrafluoroborate+water, and 1-(2-hydroxyethyl)-3-methyl imidazolium tetrafluoroborate + water system[J]. J. Chem. Eng. Data,2004,49:1550-1553.
[2] SHIFLETT M B, YOKOZEKI A. Solubility and diffusivity of hydrofluorocarbons in room-temperature ionic liquids:[Bmim] [PF6] and[Bmim] [BF4] [J]. AIChE Journal, 2006, 52(3):1205-1219.
[3] YOKOZEKI A, SHIFLETT M B. Vapor-liquid equilibria of ammonia + ionic liquid mixtures[J]. Appl. Energy, 2007, 84:1258-1273.
[4] YOKOZEKI A, SHIFLETT M B. Water solubility in ionic liquids and application to absorption cycles[J]. Ind. Eng. Chem. Res., 2010, 49:9496-9503.
[5] WANG J Z, ZHENG D X, FAN L H, et al. Vapor pressure measurement for water +1,3-dmethylimidazolium chloride system and 2,2,2-trifluoroethanol+1-ethyl-3-methyl imidazolium tetrafluoroborate system[J]. J. Chem. Eng. Data, 2010, 55:2128-2132.
[6] WU X H, LI J,FAN L H, et al. Vapor pressure measurement of water+1,3-dimethyl imidazolium tetrafluoroborate system[J]. Chinese Journal of Chemical Engineering, 2011, 19(3):473-477.
[7] LI J, ZHENG D X, FAN L H, et al. Vapor pressure measurement of the ternary system H₂O+LiBr+[Dmim]Cl, H₂O+LiBr +[Dmim]BF₄, H₂O+LiCl+[Dmim] Cl and H₂O+LiCl +[Dmim]BF₄[J]. J. Chem. Eng. Data, 2011, 56:97-101.
[8] HE Z B, ZHAO Z C, ZHANG X D, et al. Thermodynamic properties of new heat pump working pairs:1,3-dimethylimidazolium dimethy phosphate and water, ethanol and methanol[J]. Fluid Phase Equilibria, 2010, 298:83-91.
[9] REN J, ZHAO Z C, ZHANG X D. Vapor pressure, excess enthalpy and specific heat capacity of the binary working pairs containing the ionic liquid 1-ethyl-3-methylimidazolium dimethyl phosphate[J]. J. Chem. Thermodyn., 2011, 43:576-583.
[10] ZHANG X D, HU D P. Performance simulation of the absorption chiller using water and ionic liquid 1-ethyl-3-methylimidazolium dimethyl phosphate as the working pair[J]. Applied Thermal Engineering, 2011, 31:3316-3321.
[11] ZHANG X D, HU D P. Performance analysis of the single-stage absorption heat transformer using a new working pair composed of ionic liquid and water[J]. Applied Thermal Engineering, 2012, 37:129-135.
[12] XIE H, ZHAO Z C, ZHAO J H, et al. Measurement of thermal conductivity, viscosity and density of ionic liquid[EMIM] [DEP]-based nanofluids[J]. Chinese Journal of Chemical Engineering, 2016, 24(3):331-338.
[13] 戴永庆. 溴化锂吸收式制冷技术及应用[M]. 北京:机械工业出版社, 2000:43-44. DAI Yongqing. Absorption refrigeration technology and application of LiBr+H₂O[M]. Beijing:Mechanical Industry Press, 2000:43-44.
[14] 赵健华,晏双华,赵宗昌.乙基甲基咪唑磷酸二乙酯+水/甲醇/乙醇二元溶液黏度的测定和关联[J]. 计算机与应用化学, 2011, 28(4):1-4. ZHAO Jianhua, YAN Shuanghua, ZHAO Zongchang. Measurement and correlations of viscosity for binary solutions:[EMIM] [DEP]+H₂O/C₂H₅OH/CH₃OH[J]. Computer and Applied Chemistry, 2011, 28(4):1-4.

Performance experiments on absorption refrigeration cycle with ionic liquid-based working pairs

离子液体基工质对的吸收制冷循环性能实验研究

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