PERFORMANCE ANALYSIS OF STIRLING ENGINE TYPE ALPHA USING THERMODYNAMIC APPROACH BASED ON SCHMIDT THEORY
Raden Hengki Rahmanto, Yopi Handoyo, Fahrizal Zain Asrori

Universitas Islam 45
Jalan Cut Meutia No. 83, Bekasi 17113, Indonesia

Abstract

Environmental concern and the impact on climate change has spawned various technological innovations for high efficiency engines that save fuel and produce less carbon emissions. One of the technological innovations that attracted attention was the Stirling engine. Because it operates on a closed cycle and can use a variety of heat sources for its operation, the engine produces no emissions at all. The efficiency of this machine is also very high, therefore this machine has enormous potential as an alternative driving engine that is environmentally friendly in the future. This research aims to design a Stirling engine type Alpha with a capacity of 228 cc with a phase angle of 90 degrees, then analyze its performance in the form of power indicators and thermal efficiency indicators and determine the effect of the increase in temperature difference between the compression chamber temperature and the expansion chamber temperature towards engine rotation speed. The method used to analyze engine performance is the Schmidt method, which is a Stirling engine performance analysis method based on isothermal expansion and ideal gas compression. The result of this research is that the Stirling engine which is designed starts working when the compression chamber temperature is 31.9 degrees Celsius and the expansion chamber temperature is 482.2 degrees Celsius. The highest engine speed is 598 rpm which is obtained at a compression chamber temperature of 45.5 degrees Celsius and an expansion chamber temperature of 662.4 degrees Celsius. The engine power indicator is 194.6 watt at 598 rpm, while the thermal efficiency indicator is 65.94 percent. Based on the experimental data, it is also known that the increase in temperature difference between the compression chamber temperature and the expansion chamber temperature causes an increase in engine rotation speed.

Keywords: Stirling Engine Type Alpha- Schmidt Theory- Thermodynamic Approach

Topic: Engineering