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Investigation of an improved solar-powered open absorption system for cooling, dehumidification and air conditioning.

Author(s) : GOMMED K., GROSSMAN G.

Summary

The objective of this study has been to construct and test an improved laboratory system based on a liquid desiccant, and compare its performance to that of previous versions. The system constructed under this study included: newly designed absorber and desorber operating in a counter-current flow arrangement; titanium plate-type water/solution heat exchangers; and a novel solution heat and mass exchanger (HME). This HME was designed to serve as a desiccant solution reservoir for both the absorber and desorber, enabling mass transfer between them with minimum heat transfer losses and eliminating the need for an external recuperative heat exchanger. The use of this new HME together with an improved solution flow arrangement in the new system facilitates the use of adiabatic absorption/desorption with minimum circulation heat losses and wetting problems. The characteristic performance of the system was studied under varying operating conditions. The use of the new HME has fulfilled the objective of reducing the time constant of the system, and helped correct idling and level control problems that had existed in the predecessor system. The improved HME ensures maximum solution concentration on the absorber side during desorber operation.

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Pages: 943-952

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Details

  • Original title: Investigation of an improved solar-powered open absorption system for cooling, dehumidification and air conditioning.
  • Record ID : 30001299
  • Languages: English
  • Source: Sources/sinks Alternative to the Outside Air for Heat Pump and Air-conditioning Techniques (Alternative Sources - AS), Padua, Italy, April 5-7, 2011. / International Sorption Heat Pump Conference (ISHPC11), Padua, Italy, April 6-8, 2011.
  • Publication date: 2011/04/06

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