Abstract
Over 98% at the regeneration efficiency of the Regenerator must be made with the goal so that the thermal efficiency of Stirling engine may achieve over 30%. Though the regeneration efficiency is improved, as the volume of Regenerator is increased, and as the area of the heating surface is increased, on the other hand dead space volume and pressure loss increase, and they become the output lowering of the engine. It is a problem that the regeneration efficiency measures the temperature change of operative gas and matrix of the Regenerator inside. However, the accurate thermometry is not possible, when the working fluid is the gas, since the flow velocity of the gas is big for the responsibility of temperature sensor. Then, model test by the water was tried instead of operative gas in this study. Features of the experiment using the water are that the measurement of the temperature behavior is easy, because that it can decrease the flow velocity in the equal Reynold's number region and fact of the matrix in which the model length is done can be increased.
