Abstract
This paper describes structure and numerical simulation of Stirling engine having pin fins' heat exchangers. The structure of the heater consists of circular disk with pin pins. A shroud is attached on the top of the pin fins. The structure of cooler is similar to the heater. The working gas goes through heater in the radius direction from the cylinder to the heater edge. Then the working gas goes through back of the shroud to the regenerator situated around the displacer cylinder, and then goes to the cooler. First order approximation method was employed. Heat. exchanger's shape is 200mm diameter with 2mm square pin fins of 10mm length, which are shaped out overall the disk surface in 4mm pitch. The numerical result shows the output power of described engine becomes 486 Watts with air at 500kPa, 773K of heater pin fin's disk side and 298K of cooler pin pin's disk side. It is cleared that the fluid and thermal performance of pin finned heat exchanger disk is superior to the heater consisted from 100 pipes with 3mm inner diameter and 100mm length.
