Alternative scheme and dehumidification and regeneration performance validation for economic multi-component solution

doi:10.11949/j.issn.0438-1157.20181301

Abstract

Abstract:

This paper aims to search for a more economical multi-component solution to replace single solution and validate its dehumidification and regeneration performance. A configuration scheme for multi-component solution is forecasted by simple mixing rule. Moisture content of outlet air is used as evaluation indexes. Experiments are carried out to verify the dehumidification capacity and regeneration capacity between single solution and multi-component solutions. 43%, 45% and 48% LiCl/CaCl₂ multi-component solutions are substitutions for 39% LiCl solution. 51% LiBr/CaCl₂ multi-component solution is substitution for 52% LiBr solution. Taking dehumidification performance, regeneration performance and economy into consideration, 48% LiCl/CaCl₂ multi-component solution has 29.5% higher regeneration capacity than 39% LiCl solution and one third price of 39% LiCl solution. Since it has the best regeneration capacity, lowest price and slightly worse dehumidification capacity, it is the best substitute for dehumidifier. 51% LiBr/CaCl₂ multi-component solution has 50.8% higher regeneration capacity than 52% LiBr solution. It also has similar dehumidification capacity to 52% LiBr solution and half price of 52% LiBr solution. It's a good substitute for dehumidifier.

摘要：

本研究旨在寻求更经济的替代单一溶液的多元溶液并验证其除湿再生性能。基于简单混合法则，预测多元溶液的配制方案。以空气出口含湿量作为除湿、再生性能的评价指标，搭建实验台进行实验验证。综合考虑除湿性能、再生性能和经济性，实验结果表明，43%、45%、48% LiCl/CaCl₂多元溶液替代39% LiCl溶液作除湿剂，48% LiCl/CaCl₂除湿性能略差，再生能力比39% LiCl提高了29.5%，再生能力最优，成本是39% LiCl的1/3，是最佳的替代除湿剂；51% LiBr/CaCl₂多元溶液替代52% LiBr溶液作除湿剂，两者除湿能力相近，51% LiBr/CaCl₂再生能力提高了50.8%，成本是52% LiBr的1/2，是很好的替代除湿剂。

CLC Number:

TU831.6

WANG Mu, YIN Yonggao, GUO Xiaoshuang, CHEN Tingting. Alternative scheme and dehumidification and regeneration performance validation for economic multi-component solution[J]. CIESC Journal, 2018, 69(S2): 420-424.

王沐, 殷勇高, 郭枭爽, 陈婷婷. 经济型多元溶液的替代方案及除湿再生性能验证[J]. 化工学报, 2018, 69(S2): 420-424.

References

[1] AUDAH N, GHADDAR N, GHALI K.Optimized solar-powered liquid desiccant system to supply building fresh water and cooling needs[J].Applied Energy, 2011, 88(11):3726-3736.
[2] JAIN S, DHAR P L, KAUSHIK S C.Experimental studies on the dehumidifier and regenerator of a liquid desiccant cooling system[J].Applied Thermal Engineering, 2000, 20(3):253-267.
[3] 张立志.除湿技术[M].北京:化学工业出版社, 2005:191.ZHANG L Z.Dehumidification Technology[M].Beijing:Chemical Industry Press, 2005:191.
[4] LÖF G.House Heating and Cooling with Solar Energy[M].Wisconsin:University of Wisconsin Press, 1955.
[5] 易晓勤.常用溶液除湿剂的性质研究[D].北京:清华大学, 2009. YI X Q.Study on the characteristics of conventional liquid desiccant[D].Beijing:Tsinghua University, 2009.
[6] LYCHNOS G, DAVIES P A.Modelling and experimental verification of a solar-powered liquid desiccant cooling system for greenhouse food production in hot climates[J].Energy, 2012, 40(1):116-130.
[7] 沈子婧.混合盐溶液除湿剂物性测量及除湿性能强化效果探讨[D].南京:东南大学, 2016.SHEN Z J.Measurement of physical properties and discussion of dehumidification performance of mixed liquid desiccants[D].Nanjing:Southeast University, 2016.
[8] ERTAS A, ANDERSON E E, KIRIS I.Properties of a new liquid desiccant solution-lithium chloride and calcium chloride mixture[J].Solar Energy, 1992, 49(3):205-212.
[9] CHEN L F, SORIANO A N, LI M H.Vapor pressures and densities of the mixed-solvent desiccants (glycols+water+salts)[J].Journal of Chemical Thermodynamics, 2009, 41(6):724-730.
[10] AMEEL T A, GEE K G, WOOD B D.Performance predictions of alternative, low cost absorbents for open-cycle absorption solar cooling[J].Solar Energy, 1995, 54(2):65-73.
[11] HSU H, YICHOU W A, LEE L.Vapor pressures of aqueous solutions with mixed salts of NaCl+KBr and NaBr+KCl[J].Journal of Chemical and Engineering Data, 2003, 48(3):514-518.
[12] 刘晓华, 江亿, 曲凯阳.叉流溶液除湿装置全热交换过程的解析解[J].太阳能学报, 2006, 27(8):774-781.LIU X H, JIANG Y, QU K Y.Analytical solution of combined heat and mass transfer processes of cross-flow dehumidifier using liquid desiccant[J].Acta Energiae Solaris Sinica, 2006, 27(8):774-781.
[13] AHMED S Y, GANDHIDASAN P, Al-FARAYEDHI A A.Thermodynamic analysis of liquid desiccants[J].Solar Energy, 1998, 62(1):11-18.
[14] 刘晓华, 江亿.温湿度独立控制空调系统[M].北京:中国建筑工业出版社, 2006:75-76.LIU X H, JIANG Y.Temperature and Humidity Independent Control Air Conditioning System[M].Beijing:China Architecture and Building Press, 2006:75-76.

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