การศึกษาสมรรถนะเครื่องยนต์สเตอร์ลิง

Abstract

This paper presents an experimental study to evaluate the performance of the artificial stirling engine. The alpha type of a small stirling engine has been fabricated with bore and stroke of both of hot cylinder and cold cylinder are 20 mm and 30 mm respectively. For the connecting rod length, there are 79 mm for the hot cylinder and 58 mm for the cold cylinder. A frame of the burner of a gas welding machine is used as the heat source for the artificial stirling engine. The results show that the artificial stirling engine can start continually cranking with the speed of 352 rpm at the outside temperature surface of hot cylinder is 248 °C and the surface temperature difference between hot and cold cylinder is about 109 °C. The artificial stirling engine can operate to the maximum speed about 789 rpm with the outside temperature surface of hot cylinder is 305 °C and the surface temperature difference between hot and cold cylinder is 137.5 °C. The calculation can be found that the indicated power of the artificial stirling engine is 85 W and the average thermal efficiency is 44.5 %