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Application of Liquid Desiccant System

  • Xiaohua Liu
  • Yi Jiang
Chapter

Abstract

Liquid desiccant air-conditioning systems have developed quickly in recent years in China. Processed air can be dehumidified and cooled in summer, and humidified and heated in winter using liquid desiccant. Low-grade heat can be utilized to regenerate liquid desiccant, such as exhaust heat from condenser of heat pump, hot water. The operating principle of heat pump-driven-type as well as heat-driven-type outdoor air processor is analyzed. The COPair of the heat pump (or power)-driven-type outdoor air processor can be as high as 5.0 both in summer and in winter operating conditions. The COPair of the hot water-driven type (65 ~ 80 °C) is 1.19 and 0.93, respectively, using evaporative indoor exhaust air or cooling water to cool the dehumidification process. Liquid desiccant air processor-based temperature- and humidity-independent control air-conditioning system can save 20 ~ 30 % operating energy, compared with the conventional air-conditioning system.

Keywords

Humidity Ratio Total Heat Exchanger Total Heat Recovery Liquid Desiccant Direct Contact Heat Exchanger 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    Waugaman DG, Kini A, Kettleborough CF (1993) A review of desiccant cooling systems. J Energy Res Technol 115(1):1–8CrossRefGoogle Scholar
  2. 2.
    Chung TW, Ghosh TK, Hines AL (1996) Comparison between random and structured packings for dehumidification of air by lithium chloride solutions in a packed column and their heat and mass transfer correlations. Ind Eng Chem Res 35(1):192–198CrossRefGoogle Scholar
  3. 3.
    Patnaik S, Lenz TG, Lof GOG (1990) Performance studies for an experimental solar open-cycle liquid desiccant air dehumidification system. Sol Energy 44(3):123–135CrossRefGoogle Scholar
  4. 4.
    Fumo N, Goswami DY (2002) Study of an aqueous lithium chloride desiccant system: air dehumidification and desiccant regeneration. Sol Energy 72(4):351–361CrossRefGoogle Scholar
  5. 5.
    Zhang LZ (2005) Dehumidification technology. Chemical Industrial Press, Beijing (in Chinese)Google Scholar
  6. 6.
    Liu XH, Jiang Y (2006) Temperature and humidity independent control air-conditioning system. Chinese Architectural and Industrial Press, Beijing (in Chinese)Google Scholar
  7. 7.
    Liu XH, Jiang Y, Liu SQ, Chen XY (2010) Research progress on liquid desiccant air-conditioning devices and systems. Front Energy Power Eng Chin 4(1):55–65MathSciNetCrossRefMATHGoogle Scholar
  8. 8.
    Chua HT, Toh HK, Malek A, Ng KC, Srinivasan K (2000) Improved thermodynamic property fields of LiBr-H2O solution. Int J Refrig 23(6):412–429CrossRefGoogle Scholar
  9. 9.
    Conde MR (2004) Properties of aqueous solutions of lithium and calcium chlorides: formulations for use in air conditioning equipment design. Int J Therm Sci 43(4):367–382CrossRefGoogle Scholar
  10. 10.
    Liu XH, Jiang Y, Yi XQ (2009) Effect of regeneration mode on the performance of liquid desiccant packed bed regenerator. Renewable Energy 34(1):209–216CrossRefGoogle Scholar
  11. 11.
    Yin YG, Zhang XS, Chen ZQ (2007) Experimental study on dehumidifier and regenerator of liquid desiccant cooling air conditioning system. Build Environ 42(7):2505–2511CrossRefGoogle Scholar
  12. 12.
    Kessling W, Laevemann E, Kapfhammer C (1998) Energy storage for desiccant cooling systems component development. Sol Energy 64(4–6):209–221CrossRefGoogle Scholar
  13. 13.
    Zhang XS, Yin YG, Cao YR (2004) Experimental study of dehumidification performance of liquid desiccant cooling system with energy storage. J Therm Sci Technol 3(1):60–64 (in Chinese)Google Scholar
  14. 14.
    Zhao Y (2002) Study on the solar liquid desiccant air-conditioning system. Department of Power Engineering, Southeast University, Nanjing Dissertation for the doctoral degreeGoogle Scholar
  15. 15.
    Saman WY, Alizadeh S (2002) An experimental study of a cross-flow type plate heat exchanger for dehumidification/cooling. Sol Energy 73(1):59–71CrossRefGoogle Scholar
  16. 16.
    Liu XH, Zhang Y, Qu KY, Jiang Y (2006) Experimental study on mass transfer performances of cross flow dehumidifier using liquid desiccant. Energy Convers Manage 47(15–16):2682–2692CrossRefGoogle Scholar
  17. 17.
    Li WY, Dong Y, Fang CH (2000) The experimental research of liquid dehumidifying system. Acta Energiae Solaris Sinica 21(4):391–395 (in Chinese)Google Scholar
  18. 18.
    Wu AM, Li CL, Zhang HF (2006) Study on the performance of internally-cooled liquid desiccant system. Petro-Chem Equip 35(6):17–20 (in Chinese)Google Scholar
  19. 19.
    Lowenstein A, Slayzak S, Kozubal E (2006) A zero carryover liquid desiccant air conditioner for solar applications. In: ASME international solar energy conference, Denver, COGoogle Scholar
  20. 20.
    Li Z (2005) Principles of thermodynamic analysis of humid air process and its application in liquid desiccant air conditioning systems. Department of Building Science, Tsinghua University, Beijing Dissertation for the Doctoral DegreeGoogle Scholar
  21. 21.
    Li Z, Liu XH, Jiang Y, Chen XY (2005) New type of fresh air processor with liquid desiccant total heat recovery. Energy Build 37(6):587–593CrossRefGoogle Scholar
  22. 22.
    Liu SQ, Jiang Y, Xie XY, Chen XY (2007) System principle and performance of two-stage liquid desiccant outdoor air processor driven by heat pump. In: International congress of refrigeration, Beijing, ChinaGoogle Scholar
  23. 23.
    Xie XY, Jiang Y, Tang YD et al (2008) Simulation and experimental analysis of a fresh air-handling unit with liquid desiccant sensible and latent heat recovery. Build Simul 1(1):53–63CrossRefGoogle Scholar
  24. 24.
    Chang XM, Liu XH, Xie XY, Jiang Y (2007) Winter performance analysis on a liquid desiccant fresh air handling unit driven by heat source. HV AC 37(12):106–110 (in Chinese)Google Scholar
  25. 25.
    Waugaman DG, Kini A, Kettleborough CF (1993) A review of desiccant cooling systems. J Energy Res Technol 115(1):1–8CrossRefGoogle Scholar
  26. 26.
    Zhao K, Liu XH, Zhang T, Jiang Y (2011) Performance of temperature and humidity independent control air-conditioning system in an office building. Energy build 43(8):1895–1903CrossRefGoogle Scholar
  27. 27.
    Zi XQ (2007) Diagnosis of energy efficiency and study on solutions for the air conditioning of the high-rise comprehensive office building in Shenzhen. Master thesis, Chongqing University, ChongqingGoogle Scholar
  28. 28.
    Chen XY, Li Z, Jiang Y, Qu KY (2005) Field study on independent dehumidification air-conditioning system-I: performance of liquid desiccant dehumidification system. ASHRAE Trans 111(2):271–276Google Scholar
  29. 29.
    Chen XY, Li Z, Jiang Y, Qu KY (2005) Field study on independent dehumidification air-conditioning system-II: performance of the whole system. ASHRAE Trans 111(2):277–284Google Scholar

Copyright information

© Springer-Verlag London 2014

Authors and Affiliations

  1. 1.Department of Building ScienceTsinghua UniversityBeijingPeople’s Republic of China

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