IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask C1 Report, 31 October 2010
2. Difficult flow operation to ensure an even flow distribution over plates
3. Wetting difficulties when using low flow rates of desiccant solution
4. High material requirements, e.g. when used plastic material for plates
4.5 New developments of desiccant cooling systems
• L-DCS (Germany, Singapore): Advanced open cooling system using liquid desiccant
in a plate heat and mass exchanger approach. Due to low flow rates, concentrated
solution offers storage with high energy density. Three systems are currently in
operation.
• Other liquid sorption developments: Kassel University (Germany), Stuttgart
(Germany), Queens University (Canada), University of South Australia (Adelaide),
Technion Haifa (Israel), Florida (U.S.), Genius (U.S.). Different prototypes, Figures 26
and 27, have been built with different materials and ideas in order to overcome the
obstacles that hinder the progress and wide acceptance of such systems in the
HVAC industry.
Figure 26: Non-adiabatic liquid desiccant absorber/regenerator made-out of polypropylene,
University of South Australia, Krause [116]
Figure 27: Non-adiabatic liquid desiccant absorber/regenerator (left) and adiabatic liquid
desiccant absorber (right) made-out of polycarbonate in the pilot plant stage in the
laboratories of Kassel University. Jaradat et al [120].
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