การออกแบบเครื่องยนต์สเตอร์ลิงสำหรับอุณหภูมิปานกลาง

• Main Author: ชนะ ศรีคำ
• Other Authors: อังคีร์ ศรีภคากร
• Format: Theses and Dissertations
• Language: Thai
• Published: จุฬาลงกรณ์มหาวิทยาลัย 2009
• Subjects: เครื่องยนต์สเตอร์ลิงค์ > การออกแบบและการสร้าง; Stirling engines > Design and construction
• Online Access: https://digiverse.chula.ac.th/Info/item/dc:44006
• Institution: Chulalongkorn University

This study considered the potential of the Stirling engine as an alternative prime mover for concentrating solar power system, CSP. The microCSP system works in the temperature range of 300-500℃. This study developed an intermediate temperature difference Stirling engine with the rated power of 100 W. This development utilized locally available material and technology. The basic sizing of components is possible via Iwamoto’s method. Detailed sizing of the engine is performed using adiabatic analysis. The beta configuration is employed together with the Scotch-yoke mechanism to reduce friction. The electrical heater is used as a heat source in place of the solar-derived source. The engine developed 50.75 W at 363 rpm when the temperature at the heater section is 400℃ and the charged pressure is 7 bar. The output power increases to 95.40 W at 360 rpm when the temperature at the heater section is 500℃ and the charged pressure is 7 bar. The maximum thermal efficiency is 9.58% at 325 rpm. Results show that the ratio of the output power over the swept volume of the intermediate temperature difference Stirling engine has an advantage over the low temperature difference Stirling engine. In terms of the West number, the present work demonstrated that the intermediate temperature difference operation could offer the performance on par with the high temperature operations. Finally, this study revealed that conduction loss, dead volume, friction and compression loss due to piston ring are crucial to the engine performance.