The investigation of an energetic and exergetic performance characteristics of a beta‑type Stirling engine with a rhombic drive mechanism


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Erol D., Doğan B. , Çalışkan S.

Journal Of The Brazilian Society Of Mechanical Sciences And Engineering, cilt.43, sa.248, ss.1-19, 2021 (SCI İndekslerine Giren Dergi)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 43 Konu: 248
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1007/s40430-021-02939-0
  • Dergi Adı: Journal Of The Brazilian Society Of Mechanical Sciences And Engineering
  • Sayfa Sayıları: ss.1-19

Özet

In this study, efects of using helium, nitrogen, air, carbon dioxide and argon gases as working fuid in a beta-type Stirling engine with rhombic drive mechanism and swept volume of 365 cm3 on the engine performance characteristics for two diferent stainless steel and titanium displacer pistons at charge pressures of 1–5 bar were examined. The performance characteristics of manufactured Stirling engine were investigated at 1000 K (±10 K) hot end and 300 K (±5 K) cold end temperatures using a specifcally designed electrical heater. Energy and exergy analyses were carried out using temperature, pressure, speed and torque values measured in performance tests. As a result of the exergy analysis, helium gas performed the best in the stainless steel displacer piston at a charge pressure of 4 bar and an engine speed of 550 rpm. Under the said conditions, 0.3726 W/K entropy generation and 195.53 W destroyed exergy were calculated in thermodynamic analysis in the helium working fuid. Furthermore, under the same conditions, helium gas achieved the highest efciency values of 48.04% for thermal efciency, 56.54% for exergy efciency and 69.2% for Carnot efciency. The lowest exergetic performance was revealed in titanium displacer piston when argon was used as working fuid.