نویسندگان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
A dynamic-thermodynamic model of stirling engine is presented to study some of optimization factors
on engine thermal efficiency and output power. The optimization factors have been assumed as heater and
cooler heat transfer areas, regenerator solid mass amount and its heat transfer area and fluid pressure
drop. To study these factors, the model takes into account non-ideal heat transfer, non-uniform pressure
distribution and time dependant temperature variation in any stirling engine gas chambers. Calibration
parameters also have been defined so that the model should be calibrated via a test result data or simulation
data, afterward it can predict the engine behavior while changing the optimization factors.
Geometrical dimensions and test results at nominal gas pressure for ST500 stirling engine was used in
order to calibrate the model. To ensure the prediction accuracy, comparisons were accomplished between
model output and motor test results for different gas pressures. Finally the optimization factors of the
model were varied separately, model outputs were compared and the most important factor in improving
the thermal efficiency and work output was selected. The determined optimization factor was applied to
the engine and the thermal efficiency and output power was measured. The engine test results were compared
to the model prediction and to previous engine state.
کلیدواژهها [English]
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