Theoretical model of a α-type four-cylinder double-acting stirling engine based on energy method

Cheng, Chin-Hsiang; Yang, Hang Suin; Tan, Yi-Han

doi:10.1016/j.energy.2021.121730

Cited by 11 publications

(1 citation statement)

References 28 publications

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“…This shows us that the compression and expansion operations are performed by the four cylinders at different times in each cycle [29]. The most common of the double-acting Stirling engines is the Alpha-type four cylinder engine configuration [30].…”

Section: Double-acting Stirling Enginesmentioning

confidence: 98%

A Comprehensive Review on Stirling Engines

Alp Arslan,

Kocakulak

2023

eng.pers

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Stirling engines work with all kinds of heat sources thanks to the external heat supply. It has many advantages over internal combustion engines, especially in terms of noise emissions and pollutant emissions. Since the first Stirling engine invented by Robert Stirling, development work continues on it. Considering the problems caused by fossil fuels, Stirling engines are promising in the recovery of solar energy, geothermal energy and waste heat. As a result of the studies carried out from the past to the present, many Stirling engine types, cylinder configurations and drive mechanisms have been designed. In this study, the importance, advantages-disadvantages, usage areas and working principles of Stirling engines are explained. The Stirling cycle has been analyzed in detail. Carnot cycle and Ericsson cycle are mentioned and these three cycles are compared with each other in terms of work and efficiency. Stirling engine classifications, cylinder configurations and drive mechanisms are explained in detail. The design differences, operating characteristics, technological details and structural features of these configurations are examined. The advantages and disadvantages of all these different structures in terms of design, production, cost, power, efficiency, friction, wear, sealing, weight, dead volume, noise and number of parts are stated.

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Section: Double-acting Stirling Enginesmentioning

confidence: 98%

A Comprehensive Review on Stirling Engines

Alp Arslan,

Kocakulak

2023

eng.pers

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Theoretical investigations of Stirling engine performances for different filling gas properties

Hachem

Gheith

Aloui

2022

Intl J of Energy Research

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Summary Stirling engine research has increased and opened new industrial opportunities. Stirling engines have the advantage of running on any sort of thermal energy. However, their biggest downside is their low experimental efficiency compared to Carnot's optimal efficiency. Thus, much research studies the optimal working parameters of this engine. Most existing models evaluate the Stirling engine's performance using the perfect gas assumption. However, this assumption is only valid for low pressures. At high pressure, real gas behaves differently from perfect gas. Hence the necessity and the interest of the conducted research work. The major goal of this numerical study was to analyze the influence of gas qualities on Stirling engine power and efficiency using a semi‐real gas assumption. The impact of operating and geometric parameters on the performance of a four‐cylinder Stirling engine (FCSE) were explored for three monatomic gases (Helium, Neon, and Argon) and one diatomic gas (Nitrogen). The dependence of volume ratio, regenerator form factor, load pressure, hot end temperature and rotation speed on gas properties were investigated. Major significant losses were accounted for at different conditions. To figure out parameters that maintain the highest performance, four different regenerator porosity (60%, 70%, 80%, 90%), three different cylinder diameters (3.5, 4, 4.5 cm) and three different phase shifts between the two pistons (2π5, π2, 3π5) were evaluated. As regards, the obtained results, not only the optimum parameters that provide higher output power were identified but also predicted correlations for each studied filling fluid as a function of the geometric and operating parameters. The outcomes of the study would be very helpful for a new more powerful engine design. The obtained results clearly demonstrated that: (a) The choice of the filling gas is determined by the regenerator form factor. (b) The optimum volume ratio for nitrogen is roughly 1.1, whereas for Helium it is around 0.7. (c) For Helium and Neon, the output power diminishes as the volume ratio rises. (d) The output power increases significantly when the regenerator form factor (length by diameter) <0.2 and then reaches an optimum of around 2.1 kW for the Helium case. (e) Among the four studied gases, the use of Helium allows obtaining the highest output power. On the other hand, it is observed that the lowest output power is obtained when using Argon. Inside Stirling engines, the use of lightweight monoatomic gases (with high thermal conductivity and heat capacity values) boosts the output power. There is a variation in power up to 50% depending on the properties of the filling gas.

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Introduction of a Correction Factor for Predicting Real Stirling Engine Efficiency Based on Ideal Adiabatic Modelling

Laazaar¹,

Boutammachte²

2023

Lecture Notes in Electrical Engineering

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Theoretical model of a α-type four-cylinder double-acting stirling engine based on energy method

Cited by 11 publications

References 28 publications

A Comprehensive Review on Stirling Engines

A Comprehensive Review on Stirling Engines

Theoretical investigations of Stirling engine performances for different filling gas properties

Introduction of a Correction Factor for Predicting Real Stirling Engine Efficiency Based on Ideal Adiabatic Modelling

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