Abstract
The pulse tube engine is a simple prime mover based on the pulse tube process. It has high potential to be applicable in waste heat usage. In the present work a simulation model is used to design a pressurized experimental pulse tube engine employing helium as working fluid. The measured engine characteristics are compared with the calculated predictions. Using the model and the experimental test rig, the engine performance is studied for different heat input temperatures, filling pressures, and operating frequencies. The energy conversion process, based on a broken thermodynamic symmetry and a thermal lag occurring in the pulse tube, is proven theoretically. Fundamental characteristics and application limitations of the pulse tube engine are disclosed experimentally. The obtained engine behavior provides suggestions for its further development.
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