Investigation on solar desiccant dehumidification process for energy conservation of central air-conditioning systems

Li Yutong, Hongxing Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

42 Citations (Scopus)


This paper presents the numerical simulation results of an open cycle liquid desiccant dehumidification system, attempts to obtain the best configurations of the solar assisted air-conditioning system and to validate the feasibility of using a liquid desiccant dehumidification system to handle the latent load and improve the energy efficiency of HVAC systems. Firstly, based on the steady state simulation model of a solar collector/regenerator (C/R) system, the energy performance for using exhaust air to regenerate the weak desiccant solution and heating the solution to a temperature higher than the equilibrium value were tested and discussed for different lengths of the collector/regenerator panels. It was found that the thermodynamic performance was significantly improved and it was possible to shorten the length of the solar C/R without degrading the performance greatly. Secondly, the transient performance of the open cycle liquid desiccant dehumidification system was simulated for the weather conditions of Hong Kong. The energy saving, compared with a conventional vapor compression system, is in the range of 25-50%. The higher the portion of latent load in the total ventilation load, the more the energy saving.
Original languageEnglish
Pages (from-to)1118-1126
Number of pages9
JournalApplied Thermal Engineering
Issue number10
Publication statusPublished - 1 Jul 2008


  • Air-conditioning
  • Liquid desiccant
  • Open cycle solar collector/regenerator
  • Solar desiccant dehumidification

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering


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