Research On Solar Absorption Air Conditioning System With Parabolic Trough Collectors

This report will study the solar absorption air conditioning system with parabolic trough collectors. Analyze the optimum temperature and efficiency of the solar absorption air conditioning system with different collectors, and it also designs calculations for parabolic trough solar and double-effect LiBr/H2O absorption chiller air conditioning system and small double-effect LiBr/H2O absorption chiller are carried out. The main research contents and results are summarized below:Firstly, one-dimensional performance model of the parabolic trough solar collector is established, it provides a calculation basis for solar field research.Secondly, by defining the total efficiency of the solar absorption air conditioning system, it analyzes the effect of the heat source temperature on the efficiency of absorption refrigeration system using different collector under the design conditions, and the optimum temperature of heat source is obtained. Then it analyzes the optimum system temperature and system efficiency under different DNI.Moreover, based on the parabolic trough solar air conditioning system, a scheme with water as heat transfer medium is designed, the feasibility of water as heat transfer medium is discussed. It provides the theoretical basis and equipment selection guidance for the engineering example.Finally, according to some conditions such as a given refrigerating capacity, import and export temperature of chilled water, import and export temperature of cooling water, a design calculation for small double-effect LiBr/H2O absorption chiller is presented. Some results such as the heat load, state point parameters and the system’s COP of the chiller is by thermodynamic calculation, the area of each heat transfer components is obtained, too.