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二次 數値的 模型에 의하 Kinematic Stirling Engine의 設計 및 分析
金福錫,徐相龍,金在煐 順天大學校 農業科學硏究所 1990 農業科學硏究 Vol.4 No.-
A design method of kinematic Stirling engine with rhombic-drive was proposed. The design method using a mathematical model was for determination of dimensions of important engine elements to results high performance of the engine in terms of thermal efficiency at given design conditions. The proposed design method was used to design an engine 1kW power output, and performances of the designed engine at various operating conditions were predicted by second order mathematical model to give suggestion to improve the performance of the engine. Heat transfer areas of heater, regenerator and cooler were found out as important design parameters of the engine. The design method proposed in this study was considered as desirable because magnitude of the parameters were optimized by the method with consideration of the complex interlocked effects of the parameters on the thermal efficiency of the engine. The designed engine was expected to have 0.93kW and 28.2% of brake power output and overall thermal efficiency respectively, at the design conditions of the 30% of coolant temperature, 700˚C of heater heating temperature, 3.0MPa of engine mean pressure and 2000rpm of engine speed. Performance of the designed engine in terms of thermal efficiency and power output could be improved by increasing heater heating temperature and engine mean pressure, however, it would have limits because materials of the engine was limits of resistance to high temperature and stress. Thermal efficiency of the engine could be increased by speed up the engine up to the design speed of 2000rpm.