Higher order modeling of a free-piston Stirling engine: analysis and experiment

Zare, Shahryar; Shourangiz-Haghighi, Alireza

doi:10.1007/s40095-018-0267-7

Cited by 17 publications

(2 citation statements)

References 27 publications

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“…As a rule, simple models of the first or second order are used for modelling a power plant [7]. Examples of such models can be found in publications [8,9,10,11,12], where they are used for dynamic analysis of the Stirling self-oscillatory system, analysis of its stability and selection of parameters of the oscillatory system.…”

Section: Introductionmentioning

confidence: 99%

Modeling dynamics of the spacecraft power plant consisting of Stirling engine and external thermal circuit

Valiullin

Zenkin

2021

E3S Web Conf.

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Modern space programs cover a wide range of missions, including both near-earth missions and those affecting areas of deep space. In the second case, power plants based on the conversion of thermal energy into electrical energy are often considered for the power supply of spacecraft. One of the possible thermoelectric converters is the Stirling engine. To be able to design modern power plants of spacecraft built based on Stirling engines, it is necessary to use calculation tools to simulate their operation in a wide range of modes, to take into consideration the influence of subsystems on each other and the final characteristics of the power plant. As part of the work, a thermodynamic model of an external thermal circuit was created, consisting of heat pipes, heat exchangers and radiator cooler panels. The hot thermal circuit is consisted of two parts: primary and secondary, the cold thermal circuit is consisted of only one part. A mathematical model of the free-piston Stirling engine of the first order has been also implemented. The working fluid in the engine is helium. The developed models were independently debugged and then integrated into a single model of the power plant. For each type of model, the corresponding mathematical models are presented and the basic assumptions are described. The model is implemented in an open simulation environment of xcos/scilab, examples of power plant model implementation are presented. Numerical experiments were carried out to study the dynamics of the heating of the contour elements (with independent, and then with integrated modeling) and the effect of the non-stationary thermal state on the engine performance. The article presents the basic equations and the design schemes for the power plant model, as well as some results of numerical simulation, including the dynamics of hot and cold circuit temperature changes and the dynamics of changes in the indicator diagram of the engine when the external thermal circuit is heated. The developed model can be used in the early stages of spacecraft design for a preliminary assessment of the main indicators of the power plant, its dimensions and thermal loads.

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Section: Introductionmentioning

confidence: 99%

Modeling dynamics of the spacecraft power plant consisting of Stirling engine and external thermal circuit

Valiullin

Zenkin

2021

E3S Web Conf.

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“…32,33 Indeed, the GA technique is an important method in the optimization of energy systems. [34][35][36][37][38][39][40] A major advantage of GA is that it is reliable and robust that it can reach the global optima. The GA technique has been previously applied to design other types of thermo-acoustic converters with success.…”

Section: Introductionmentioning

confidence: 99%

Design of a traveling wave thermo‐acoustic engine based on genetic algorithm

Zare

Tavakolpour-Saleh

2019

Int J Energy Res

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Summary This paper presents a novel design scheme for traveling wave thermo‐acoustic Stirling engines (TASEs) based on a target frequency using genetic algorithm (GA). First, the effects of engine design parameters on the system performance are studied via root locus method. Accordingly, it is found that the resonator length, the inertance diameter, and the hot gas temperature are the most effective parameters in the engine design procedure. Next, the relation between the closed‐loop poles positions of the thermo‐acoustic system and the effective design variables are described parametrically. Consequently, in order to estimate the optimum values of the effective design parameters as well as the unknown positions of the nondominant poles, an appropriate fitness function based on the desired engine frequency is proposed. Subsequently, a GA is used to achieve the optimal values of design parameters so as to minimize the considered cost function. Finally, the validity of the proposed design technique is verified by comparing the obtained results with the available data of an experimental case study.

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Free piston Stirling engines: A review

Zare

Tavakolpour-Saleh

2019

Int J Energy Res

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This paper presents a detailed review on free piston Stirling engines (FPSEs) technology. Generally, the Stirling engines can be categorized into two broad classes comprising kinematic and dynamic converters among which FPSEs are known as the dynamic type. Other well-known dynamic Stirling converters are Fluidyne and thermosacoustic engines among which the thermosacoustic ones are the most advanced Stirling converters recently presented. In this research, the dynamic Stirling engines are first introduced and reviewed. Then, the review work is directed toward the FPSEs, one of the most reliable dynamic Stirling converters utilized in different applications such as combined heat and power systems (CHPs). Subsequently, the working principles of different types of FPSEs and their performance are summarized. Next, several manufactured FPSEs, as well as their corresponding features and applications, are discussed. Finally, the article is conducted to analysis and modeling approaches of FPSEs.Accordingly, linear and nonlinear analytical techniques of FPSEs are introduced, and some comparative data are provided to verify the modeling schemes. Then, various design parameters affecting the engine performance are introduced and studied. The outcomes of this review work demonstrate the potential of FPSEs for different applications and reveal that the perturbation-based model is likely the most comprehensive nonlinear method for modeling and design of the FPSEs.

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Higher order modeling of a free-piston Stirling engine: analysis and experiment

Cited by 17 publications

References 27 publications

Modeling dynamics of the spacecraft power plant consisting of Stirling engine and external thermal circuit

Modeling dynamics of the spacecraft power plant consisting of Stirling engine and external thermal circuit

Design of a traveling wave thermo‐acoustic engine based on genetic algorithm

Free piston Stirling engines: A review

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