TED-AJ03-609 Optimum design method of an absorption refrigerator : 1^<st> report : Single effect absorption cycle

概要

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This paper discusses the optimum design method of an single effect absorption cycle with a simulation. For the optimum design method, the evaluation function is COP and the point that COP is maximized is regarded as the optimum point. The simulation model of the single effect absorption cycle is described as nonlinear equations. COP is derived form these nonlinear equations. And the constraints within which the absorption cycle can be driven normally exist. Considering the non-linearity of the simulation model and the constraints, the optimum design problem of the single effect absorption cycle can be led to the nonlinear constrained optimization problem. This problem is analyzed with the exterior penalty method, and success and failure method. As a result of the analysis, it was clarified that at the point that the temperature efficiencies of the evaporator, absorber, condenser and solution heat exchanger were the maximum temperature efficiencies as constraints, COP was maximized, and the optimum generator solution outlet temperature existed to maximize COP. For example, at the point of 85% maximum temperature efficiency, COP was 081 and the optimum generator solution outlet temperature was 81.7℃. And if the heat source temperature was over 87.9℃, COP constant in spite of the increase in heat source temperature, and the generator temperature efficiency that maximized COP on the contrary decreased.
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