Characteristic Study And Numerical Simulation Of A500W Stirling Engine

In current society, with the worsening environmental pollution and energy problems,it becomes more and more important to increase energy efficiency and use alternativeenergy. According to the energy economists, the demand of energy is increasing; and thistrend will remain until the year2035. To solve this problem, many countries have startedto give subsidies to the renewable energy industry. It becomes more and more importantto develop clean energy.The Stirling engine can use a variety of energy as long as the temperature can reachmore than450degrees, so it has bright future for application in areas such as powergeneration in remote areas. Because of the regeneration process, it can improve theenergy efficiency, so it is very important for the rational use of energy. This work focuseson a500W α-type Stirling engine. To get the model which can simulate the performanceof the Stirling engine, all kinds of analysis methods are studied and comparedsufficiently.Based on this, the construction parameters of the500W Stirling engine is given. Withthe help of MATLAB, a simulation is done to validate the feasibility of the design，thesimulation result shows that the error is1%; At the same time, the optimization of theheat exchange system is given. To make the analysis more accurate, the fourth orderanalysis method and computational heat transfer is used to analyze the key part of theStirling engine—regenerator. From the analysis, we get the axial temperature distribution，the temperature field and pressure field of the regenerator, and give a feasible analysisabout the result. According to the numerical simulation results, when the inlet velocity isabove2m/s, the axis temperature is linear; but when the inlet velocity is lower, the heattransfer at the end is better that in the middle, the isotherms are more intensive near theend. Then some advice is given on how to improve the performance of the regenerator.