In this work, a methodology for analysis of the performance of wire meshes as regenerative media for Stirling engines is proposed. Methodology includes operation conditions of the engine and mesh physical characteristics, such as material and porosity, as parameters to predict the pressure drop and the thermal efficiency of the mesh. The proposed m...
Context in source publication
... fabrication cost is also important when selecting a material for a regenerator. Table 5 was made with the information provided by a retailer of steel meshes in Mexico; it shows the cost of the material needed to make the regenerator for the gamma type Stirling engine 125-O. This table shows that cost of mesh #500 is too high to consider it as a viable option. ...
Metallic wire mesh filter is characterized by corrosion resistance, high strength and plasticity, stability under high pressure difference, favourable regeneration performance and long lifetime, which can be used to purify cryogenic liquid. In order to research its filtration performance at different temperatures and to discuss the filtration mecha...
This paper focuses on nonlinear dynamic analysis of a solar-powered free piston hot-air engine. First, dynamic and thermodynamic equations governing the free piston hot-air engine are extracted. Accordingly, by coupling the obtained relationships, nonlinear behavior of the free piston hot-air engine is simulated. Then, motion and velocity of the pistons in steady state condition are discussed using numerical solution of the nonlinear equations and using the phase plane analysis. Next, the stroke of pistons, maximum and minimum volumes and pressure as well as the produced work and power are studied corresponding to the change of temperatures in the hot and cold chambers. Since the damping coefficient between power piston and the cylinder wall is variable due to the temperature changes and environmental conditions, its effect on the stroke of pistons, maximum and minimum volumes, pressure, produced work and power is investigated. The results obtained clearly indicate that there is an optimal power for a certain value of damping coefficient. Then, the stroke of the pistons, maximum and minimum volume and pressure as well as the produced work and power are studied according to the changes in engine parameters such as mass and stiffness of work and displacer pistons. The ranges of variations of engine parameters are selected so that the motions of displacer and power pistons fall into a limit cycle. Finally, sensitivity analysis of the produced power is carried out considering changes in engine parameters.
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