Experimental study on regenerative effectiveness and flow characteristics of parallel-plate regenerator in Stirling engine

Liu, Meng; Zhang, Bilin; Han, Dongtai; Du, Xueping; Wang, Huanguang

doi:10.1016/j.applthermaleng.2022.119139

Cited by 7 publications

(2 citation statements)

References 34 publications

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“…, вряд ли с достаточной точностью отражает теплообмен в насадке регенератора. Корректировка критериальных уравнений, характерных для течения рабочего тела в насадках регенератора для расчета числа Нуссельта (Nu) выполнялось также в работах [14], [15]. Имеющийся разброс полученных значений чисел Nu (при одном и том же числе Рейнольдса Re) достигает трехкратной величины.…”

Section: введение (Introduction)unclassified

Evaluation of the operating conditions of the Stirling engine heat exchangers

Petrov

2023

jour

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The development of modern energy is inextricably linked with the further improvement of heat engines, which are still the only primary sources of mechanical energy on an industrial scale. Given the existing environmental problems, Stirling engines can be a good alternative to internal combustion engines and turbines. Of the many problems of creating such a sufficiently powerful and economical engine, it is customary to consider three main ones: 1) efficient transfer of large heat fluxes in the heater, regenerator and refrigerator; 2) creation of reliable and durable seals to hold the working fluid in the cylinder; 3) ensuring minimal friction in bearings and seals. And yet, of the three listed problems, the first should be given more attention, first of all, due to the unique conditions associated with the continuously changing thermo and mechanical loads. The instability of the loads is further complicated by the sharply different heat transfer coefficient on the external and internal heat transfer surfaces. That is, there are factors that contradict the requirements for the size of the heat transfer surface, the friction resistance of the working medium and the dead volume of the engine as a whole. In this regard, it is of interest to search for possible ways to reduce the effect of negative factors of non-stationary heat transfer in the calculation of heat exchangers. The current lack of suitable theoretical methods of calculation forces the use of semi-empirical methods. The aim of the paper is to assess the significance of the unique, characteristic of Stirling engines, the negative phenomenon of the delay in the flow of the working fluid in heat exchangers. For this purpose, a real kinematic diagram of the movement of the engine pistons with a rhombic drive by R. Meyer, created using the design program, is used. The analogue is the 4–235 type real engine of the Philips Company. In the calculations, a step-by-step procedure for calculating the time-varying parameters of the working fluid is used. The need for such a solution is due to the fact that in the rhombic drive of R. Meyer, the pistons movement and the change in the displaced volumes complexly depend on the angle of rotation of the engine shaft. In addition, the exact value of the real change in volume is possible only when the terms of the analytic equation of volume change under consideration are decomposed into a Fourier series.

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Section: введение (Introduction)unclassified

Evaluation of the operating conditions of the Stirling engine heat exchangers

Petrov

2023

jour

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“…Kim DongJun et al optimized the heat exchanger design of the free piston Stirling engine (FPSE) (Kim et al, 2022). Liu Meng et al experimentally studied the heat transfer and flow characteristics of parallel plate regenerator (PPR) and identified the influence law of material parameters and geometric parameters on the regenerator effect and pressure drop (Meng et al, 2022). According to the dynamic configuration of Stirling engine, Li Jiqiang et al studied the power and efficiency changes by modifying the proportion and thermodynamic proportion of the engine (Jiqiang and Fuping, 2022).…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Thermodynamic Characteristics of Stirling Engine

Lyu,

Lu,

et al. 2023

Smart Manufacturing and Material Processing (SMMP)

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For the purpose of designing a more efficient Stirling engine, the author experimentally studied the hot cylinder surface temperature changes of micro Stirling engine with heating time, analyzed the cold cylinder surface temperature changes of the engine with heating time as well as cylinder temperature at the start of the engine. It was found that, the hot cylinder temperature of the engine changed with the heating time, which stopped temperature rise when a certain temperature was reached. The engine revolving speed increased with the increase of the hot cylinder temperature. The higher the hot cylinder temperature was, the greater the engine revolving speed was. The cold cylinder temperature of the engine changed with the heating time, which stopped temperature rise when a certain temperature was reached. This study will provide insight into the thermodynamic characteristics of Stirling engine and help us further study the thermal efficiency of the engine.

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A novel approach towards the selection of regenerators for optimal Stirling engine performance based on energy and exergy analyses

Yu,

Zhang,

et al. 2023

Sci. China Technol. Sci.

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Experimental study on regenerative effectiveness and flow characteristics of parallel-plate regenerator in Stirling engine

Cited by 7 publications

References 34 publications

Evaluation of the operating conditions of the Stirling engine heat exchangers

Evaluation of the operating conditions of the Stirling engine heat exchangers

Experimental Study on Thermodynamic Characteristics of Stirling Engine

A novel approach towards the selection of regenerators for optimal Stirling engine performance based on energy and exergy analyses

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