Abstract
A system simulation program of the solar system which used CPC combined with dual effect absorption refrigerating machine has been developed, the system model of which is actually installed in a hospital. The characteristics of the solar plant and the optimum working condition have been discussed. Thermal capacity of collectors and working fluids were taken into account in order to increase accuracy of system simulation. Two kinds of performance index were defined for optimal control. One is the primary energy consumption of pumps and auxiliary heat source/sink, and the other is the COP of the system based on the primary energy. Using each of them and several constraints given by the design policies as well as capacities of machines, the optimum selection of the solar load and the optimum flow rate of working fluids were decided. As the result of simulations, it is suggested that the primary energy comsumption decreased by 20% in a peak load day (both summer and winter) due to the optimal control. In addition, solar energy utilization pattern was shown through yearly simulations.
