CaCl_2和LiBr混合盐溶液除湿性能实验研究
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摘要
为降低溶液除湿系统的生产成本及运行能耗,本文针对基于新型混合盐溶液的溶液除湿设备进行实验研究,构建溶液除湿系统及测试平台,以溴化锂(LiBr)和氯化钙(CaCl_2)为混合盐溶液工作介质,对溶液除湿系统除湿模块进出口空气参数、再生模块进出口空气参数、系统功耗等进行测试,分析其除湿能力、制冷能力和除湿性能系数。根据混合盐溶液的初投资及工作性能,以溶液除湿系统全寿命周期的总费用作为衡量溶液综合性价比的指标,进行对比计算,结果表明:采用3:1的LiBr和CaCl_2混合盐溶液除湿系统的综合性价比最高,总费用最高可降低14.5%。
To reduce the production cost and running energy consumption of a solution dehumidification system, experiments were conducted in this study on dehumidification equipment based on a mixed salt solution consisting of LiBr and CaCl_2. The temperature and humidity of inlet and outlet air as well as the energy consumption of the dehumidification device were measured. The dehumidification capacity, refrigeration capacity, and dehumidification performance coefficient of the system were analyzed. Based on the initial investment and working performance of the mixed salt solution, a comprehensive performance and cost ratio of the solution was weighed by considering the life cycle cost of the solution dehumidification system. The results showed that the mixed LiBr and CaCl_2 solution at a ratio of 3:1 can obtain a higher dehumidification efficiency and lower cost compared to other combination, and the total cost can be reduced by 14.5%.
To reduce the production cost and running energy consumption of a solution dehumidification system, experiments were conducted in this study on dehumidification equipment based on a mixed salt solution consisting of LiBr and CaCl_2. The temperature and humidity of inlet and outlet air as well as the energy consumption of the dehumidification device were measured. The dehumidification capacity, refrigeration capacity, and dehumidification performance coefficient of the system were analyzed. Based on the initial investment and working performance of the mixed salt solution, a comprehensive performance and cost ratio of the solution was weighed by considering the life cycle cost of the solution dehumidification system. The results showed that the mixed LiBr and CaCl_2 solution at a ratio of 3:1 can obtain a higher dehumidification efficiency and lower cost compared to other combination, and the total cost can be reduced by 14.5%.
引文
[1] 曾台烨, 张小松, 陈瑶. 利用冷凝热再生低浓度除湿溶液的实验研究[J]. 制冷学报, 2018, 39(2):76-82. (ZENG Taiye, ZHANG Xiaosong, CHEN Yao. Experimental investigation for low-concentration liquid desiccant regeneration with utilization of condensation heat[J]. Journal of Refrigeration, 2018, 39(2):76-82.)
[2] 汪行, 柳建华, 赵永杰, 等. 液体除湿空调除湿器性能研究[J]. 制冷学报, 2017, 38(2):45-50. (WANG Xing, LIU Jianhua, ZHAO Yongjie, et al. Study on the performance of dehumidifier with liquid desiccant[J]. Journal of Refrigeration, 2017, 38(2):45-50. )
[3] ZHANG Tao, LIU Xiaohua, JIANG Yi. Performance comparison of liquid desiccant air handling processes from the perspective of matched properties[J]. Energy Conversion and Management, 2013,75(5):51-60.
[4] ZHAO Kang, LIU Xiaohua, ZHANG Tao, et al. Performance of temperature and humidity independent control air-conditioning system applied in an office building[J]. Energy and Buildings, 2011, 43(6):1895-1903.
[5] KORNOAKI I P, CHRISTODOULAKI R I, PAPAEFTHIMIOU V D, et al. Thermodynamic analysis of a counter flow adiabatic dehumidifier with different liquid desiccant materials[J]. Applied Thermal Engineering, 2013, 50(1): 361-373.
[6] ZHANG Tao, LIU Xiaohua, JIANG Jingjing, et al. Experimental analysis of an internally cooled liquid desiccant dehumidifier[J]. Building and Environment, 2013, 63:1-10.
[7] MOHAMMAD A T, MAT S B, SULAIMAN M Y, et al. Survey of hybrid liquid desiccant air conditioning systems[J]. Renewable and Sustainable Energy Reviews, 2013, 20:186-200.
[8] 易晓勤, 刘晓华, 江亿, 等. 两种除湿溶液的再生性能对比实验研究[J]. 太阳能学报, 2010, 31(2):168-173. (YI Xiaoqin, LIU Xiaohua, JIANG Yi, et al. Experimental and analytical comparison on regenerating capability of two kinds of dehumidifying solution[J]. Acta Energiae Solaris Sinica, 2010, 31(2):168-173. )
[9] LIU X H, YI X Q, JIANG Y. Mass transfer performance comparison of two commonly used liquid desiccants: LiBr and LiCl aqueous solutions[J]. Energy Conversion and Management, 2011, 52(1):180-190.
[10] DING Tao, HUANG Zhidong, WANG Pingzhi, et al. Performance of mixed salt solution in solar dehumidification system[J]. Transactions of the CSAE, 2009,25(10):236-240.
[11] YANG Ying, LI Xingang, LI Weiyi, et al. Experimental study on the characteristics of solar powered liquid dehumidification system[J]. Acta Energiae Solaris Sinica, 2000, 21(8):155-159.
[12] ERTAS A, ANDERSON E, KIRIS I. Properties of a new liquid desiccant solution—lithium chloride and calcium chloride mixture[J]. Solar Energy, 1992, 49(3):205-212.
[13] ZHAO Xiao, LI Xiuwei, ZHANG Xiaosong. Selection of optimal mixed liquid desiccants and performance analysis of the liquid desiccant cooling system[J]. Applied Thermal Engineering, 2016,94(7):622-634.
[14] LI Xiuwei, ZHANG Xiaosong, WANG Geng. Research on ratio selection of a mixed liquid desiccant: mixed LiCl-CaCl2 solution[J]. Solar Energy, 2008,82(5):1161-1171.
[15] TSAI C Y, SORIANO A N, LI M H. Vapour pressures, densities, and viscosities of the aqueous solutions containing (triethylene glycol or propylene glycol) and (LiCl or LiBr)[J]. The Journal of Chemical Thermodynamics, 2009, 41(5):623-631.
[16] CHEN S Y, SORIANO A N, LERON R B. Density and vapour pressure of mixed-solvent desiccant systems[J]. The Journal of Chemical Thermodynamics, 2014, 79(4):235-241.
[2] 汪行, 柳建华, 赵永杰, 等. 液体除湿空调除湿器性能研究[J]. 制冷学报, 2017, 38(2):45-50. (WANG Xing, LIU Jianhua, ZHAO Yongjie, et al. Study on the performance of dehumidifier with liquid desiccant[J]. Journal of Refrigeration, 2017, 38(2):45-50. )
[3] ZHANG Tao, LIU Xiaohua, JIANG Yi. Performance comparison of liquid desiccant air handling processes from the perspective of matched properties[J]. Energy Conversion and Management, 2013,75(5):51-60.
[4] ZHAO Kang, LIU Xiaohua, ZHANG Tao, et al. Performance of temperature and humidity independent control air-conditioning system applied in an office building[J]. Energy and Buildings, 2011, 43(6):1895-1903.
[5] KORNOAKI I P, CHRISTODOULAKI R I, PAPAEFTHIMIOU V D, et al. Thermodynamic analysis of a counter flow adiabatic dehumidifier with different liquid desiccant materials[J]. Applied Thermal Engineering, 2013, 50(1): 361-373.
[6] ZHANG Tao, LIU Xiaohua, JIANG Jingjing, et al. Experimental analysis of an internally cooled liquid desiccant dehumidifier[J]. Building and Environment, 2013, 63:1-10.
[7] MOHAMMAD A T, MAT S B, SULAIMAN M Y, et al. Survey of hybrid liquid desiccant air conditioning systems[J]. Renewable and Sustainable Energy Reviews, 2013, 20:186-200.
[8] 易晓勤, 刘晓华, 江亿, 等. 两种除湿溶液的再生性能对比实验研究[J]. 太阳能学报, 2010, 31(2):168-173. (YI Xiaoqin, LIU Xiaohua, JIANG Yi, et al. Experimental and analytical comparison on regenerating capability of two kinds of dehumidifying solution[J]. Acta Energiae Solaris Sinica, 2010, 31(2):168-173. )
[9] LIU X H, YI X Q, JIANG Y. Mass transfer performance comparison of two commonly used liquid desiccants: LiBr and LiCl aqueous solutions[J]. Energy Conversion and Management, 2011, 52(1):180-190.
[10] DING Tao, HUANG Zhidong, WANG Pingzhi, et al. Performance of mixed salt solution in solar dehumidification system[J]. Transactions of the CSAE, 2009,25(10):236-240.
[11] YANG Ying, LI Xingang, LI Weiyi, et al. Experimental study on the characteristics of solar powered liquid dehumidification system[J]. Acta Energiae Solaris Sinica, 2000, 21(8):155-159.
[12] ERTAS A, ANDERSON E, KIRIS I. Properties of a new liquid desiccant solution—lithium chloride and calcium chloride mixture[J]. Solar Energy, 1992, 49(3):205-212.
[13] ZHAO Xiao, LI Xiuwei, ZHANG Xiaosong. Selection of optimal mixed liquid desiccants and performance analysis of the liquid desiccant cooling system[J]. Applied Thermal Engineering, 2016,94(7):622-634.
[14] LI Xiuwei, ZHANG Xiaosong, WANG Geng. Research on ratio selection of a mixed liquid desiccant: mixed LiCl-CaCl2 solution[J]. Solar Energy, 2008,82(5):1161-1171.
[15] TSAI C Y, SORIANO A N, LI M H. Vapour pressures, densities, and viscosities of the aqueous solutions containing (triethylene glycol or propylene glycol) and (LiCl or LiBr)[J]. The Journal of Chemical Thermodynamics, 2009, 41(5):623-631.
[16] CHEN S Y, SORIANO A N, LERON R B. Density and vapour pressure of mixed-solvent desiccant systems[J]. The Journal of Chemical Thermodynamics, 2014, 79(4):235-241.
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