Performance of low-temperature differential Stirling engines

Bancha Kongtragool and Somchai Wongwises

Renewable Energy, 2007, vol. 32, issue 4, 547-566

Abstract: In this paper, two single-acting, twin power piston and four power pistons, gamma-configuration, low-temperature differential Stirling engine are designed and constructed. The engine performance is tested with air at atmospheric pressure by using a gas burner as a heat source. The engine is tested with various heat inputs. Variations of engine torque, shaft power and brake thermal efficiency at various heat inputs with engine speed and engine performance are presented. The Beale number obtained from testing of the engines is also investigated. The results indicate that, for twin power piston engine, at a maximum actual heat input of 2355J/s with a heater temperature of 589K, the engine produces a maximum torque of 1.222Nm at 67.7rpm, a maximum shaft power of 11.8W at 133rpm, and a maximum brake thermal efficiency of 0.494% at 133rpm, approximately. For the four power pistons engine, the results indicate that at the maximum actual heat input of 4041J/s with the heater temperature of 771K, the engine produces a maximum torque of 10.55Nm at 28.5rpm, a maximum shaft power of 32.7W at 42.1rpm, and a maximum brake thermal efficiency of 0.809% at 42.1rpm, approximately.

Keywords: Stirling engine; Hot-air engine; Regenerative heat engine (search for similar items in EconPapers)
Date: 2007
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (17)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:32:y:2007:i:4:p:547-566

DOI: 10.1016/j.renene.2006.03.003

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