Abstract
In this paper, an independent-developed solar parabolic trough collector (PTC) for solar air conditioning has been adopted in a solar air conditioning system with a three-phase accumulator. The composition and operation strategy of the system are elaborated in detail. In view of the measured data of the solar energy and the cooling load demand of buildings, the reasonable matching design of the solar collector, absorption refrigeration chiller and three-phase accumulator is carried out. On this basis, the dynamic performance of the solar air conditioning system with the independent-developed PTC is analyzed. The calculation and analysis results show that the solar air conditioning system with a three-phase accumulator can continuously and steadily supply cooling for buildings day and night. Cooperative operation of the solar absorption refrigeration with the PTC and the three-phase accumulator can not only improve the efficiency of the parabolic trough collector, but also ensure the high energy storage efficiency of the three-phase accumulator. The average parabolic though collector efficiency is 67.5%, the energy storage efficiency of the three-phase accumulator is 0.8, the solar fraction can reach 82.4%. Based on the economic analysis, the investment of the solar air conditioning system with a three-phase accumulator is acceptable.
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