Numerical and experimental study of a compact
            <scp>100‐W‐class β‐type</scp>
            Stirling engine

Cheng, Chin‐Hsiang; Phung, Duc Thuan

doi:10.1002/er.6271

Cited by 10 publications

(17 citation statements)

References 29 publications

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“…Details about the CFD model are available in Cheng and Phung. 18 Typically, the matching procedure requires only three iterations. Results of required coefficients of thermodynamic model are tabulated in Table 3 for the test case using the parameters given in Tables 1 and 2 after the data exchanging process.…”

Section: Resultsmentioning

confidence: 99%

“…In this section, the experimental data, provided by Cheng and Phung, 18 are used here for validating the data exchanging approach. The specifications of the β-type Stirling prototype engine are detailed in Table 5.…”

Section: Methodsmentioning

confidence: 99%

“…Detailed information regarding the experimental and numerical methods of determination of the shaft power of the engine is available in. 18 To save space of this report, the information is not provided herein.…”

Section: Methodsmentioning

confidence: 99%

“…where R is the gas constant. Note that quantities with superscript "*" in Equations (15)(16)(17)(18) are exact solutions to the ordinary differential equations. Quantities without superscript "*" ( 15) are approximate solutions to the discretized equations in the subsequent sections.…”

Section: Ideal-gas Equation Of Statementioning

confidence: 99%

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Exchanging data between computational fluid dynamic and thermodynamic models for improving numerical analysis of Stirling engines

Cheng

Phung

2021

Energy Science & Engineering

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In the past several decades, remarkable increases in global population, economic size, and urbanization lead to the exponential depletion of fossil fuels. Wagner et al 1 predicted that the Proved and Ultimately Recoverable Reserves would become scarce in the second half of the 21st century. In addition, all countries over the world are currently seriously relying on fossil fuel so that they are facing the energy crisis inevitably. Renewable energy, such as solar energy, wind energy,

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Ideal-gas Equation Of Statementioning

confidence: 99%

See 2 more Smart Citations

Exchanging data between computational fluid dynamic and thermodynamic models for improving numerical analysis of Stirling engines

Cheng

Phung

2021

Energy Science & Engineering

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“…In the experimental studies, it was reported that maximum power was acquired to be 507.3 W with helium gas at 15 bar. 44 Li et al produced a Stirling engine with rhombic mechanism using waste gases and carried out its experimental studies. As a result of the tests, it was stated that maximum power output of 3476 W was acquired at an engine speed of 1248 rpm.…”

Section: Introductionmentioning

confidence: 99%

The examination of performance characteristics of a beta‐type Stirling engine with a rhombic mechanism: The influence of various working fluids and displacer piston materials

Erol

Çalışkan

2021

Int J Energy Res

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In this study, to develop a power generation system that can use renewable energy resources more efficiently, a beta-type Stirling engine with rhombic mechanism was designed and manufactured. Kinematic and thermodynamic analyses of a beta-type Stirling engine were performed numerically in the Fortran program.Volume and pressure changes depending on crankshaft angle of Stirling engine were made using the isothermal analysis. The effects of the basic parameters related to engine performance, such as working fluid mass, charge pressure, heater, and coolant temperatures, on the net work amount were investigated. Five different gases, including helium, air, nitrogen, carbon dioxide, and argon, were used as a working fluid in experimental studies. The effects of all these gases on engine performance characteristics were examined at charge pressures of 1 to 5 bar for two different displacer pistons made of stainless steel and titanium material. The performance characteristics of Stirling engine manufactured were tested using a specially designed electrical heater, at 727 C hot end and 27 C cold end temperature, depending on engine speed. In all experimental studies, maximum power output was acquired to be 215.48 W, at 4 bar and 550 rpm when a stainless steel displacer piston and helium gas as a working fluid were used, and maximum torque value was acquired to be 7.54 Nm, at 5 bar and 150 rpm. The lowest engine power output among maximum engine powers was acquired to be 34.66 W when argon gas was used as a working fluid at 3 bar and 300 rpm, using a displacer piston made of titanium material. Maximum power output acquired in the experimental studies using a stainless steel displacer piston and helium; it was determined that it is 72.12%, 73.69%, 241.49%, and 288.81% higher than the engine power acquired by nitrogen, air, carbon dioxide, and argon gases, respectively.

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A novel time-dependent analytical model for optimizing efficiency and valve timing in Ericsson engines

Tzouganakis,

Gakos,

Kalligeros

et al. 2024

J Therm Anal Calorim

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In this work, a novel analytical time-sensitive model for Ericsson engines was developed taking into account the heat transfer phenomena between the working gas and the cylinder walls in the compressor and the expander. For the calculation of the mass flow entering/exiting each cylinder, another dedicated flow model was developed to account for the pressure drop at the valves. From the energy equilibrium taking into consideration the time-dependent thermal response of the cylinder walls and the enthalpy entering/exiting each cylinder through the valves, an analytical solution of the working gas pressure and temperature can be obtained for every time step and consequently, the thermal efficiency of the engine can be calculated. A case study was performed where the thermal efficiency of an Ericsson engine was calculated for different rotational speeds and heat exchanger gas temperatures. It was observed that with higher temperatures thermal efficiency maintained a more stable behaviour with a weak dependence on rotational speed. The thermal efficiency of the engine in the performed case studies was found in the range of 10% to 14%. The valve timing of the Ericsson engine was optimized in order to achieve the highest thermal efficiency possible. The thermal efficiency of the engine could be increased up to 26% as a percentage after a thorough optimization of the valve timing. Finally, backflow phenomena accounting for thermal efficiency drop were studied. The developed model can also be applied to other types of external combustion engines such as Stirling engines.

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Numerical and experimental study of a compact 100‐W‐class β‐type Stirling engine

Cited by 10 publications

References 29 publications

Exchanging data between computational fluid dynamic and thermodynamic models for improving numerical analysis of Stirling engines

Exchanging data between computational fluid dynamic and thermodynamic models for improving numerical analysis of Stirling engines

The examination of performance characteristics of a beta‐type Stirling engine with a rhombic mechanism: The influence of various working fluids and displacer piston materials

A novel time-dependent analytical model for optimizing efficiency and valve timing in Ericsson engines

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