Stirling cycle engines for recovering low and moderate temperature heat: A review

Wang, Kai; Sanders, S.R.; Dubey, Swapnil; Choo, Fook Hoong; Duan, Fei

doi:10.1016/j.rser.2016.04.031

Cited by 181 publications

(83 citation statements)

References 92 publications

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“…Equation (11) indicates that a small |Z LA | and a large | p 1,LA | are conducive to the increase of W e . Equation (12) shows that |Z LA | will reach a minimal value when ω is equal to K þ γp m A 2 p =V b 0:5 =M 0:5 , which corresponds to the frequency of 40 Hz.…”

Section: Optimization Of Electric Capacitance Mixture Compositionmentioning

confidence: 99%

“…8 The thermal efficiency of some thermoacoustic engines can be comparable to that of the common internal combustion engine. 11 In the last decade, researchers have explored the feasibility of low-grade heat recovery by thermoacoustic technology. 10 However, the traditional thermoacoustic systems generally require heat sources at the temperature between 400°C and 700°C.…”

Section: Introductionmentioning

confidence: 99%

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Performance comparison of looped thermoacoustic electric generators with various thermoacoustic stages

et al. 2019

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Thermoacoustic engine is a kind of novel heat engine based on thermoacoustic effect, with the merits of environmental benignity, simplicity, and reliability. In this work, looped travelling-wave thermoacoustic electric generators (LTTEGs) with one to four thermoacoustic stages have been developed and experimentally studied. It is observed that adding thermoacoustic stages can improve the thermal-electric efficiency of LTTEGs, while whether the extra stages lead to efficiency gain depends on the number of existing stages and other operating parameters (hot temperature, for instance). One main reason is that the Gedeon streaming, which might cause severe heat loss, can be enhanced by adding thermoacoustic stages and increasing hot temperature. The results suggest that the suppression of streaming in the looped thermoacoustic engine with multiple stages is even more urgent than in the traditional travellingwave engine with only one stage.

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Section: Optimization Of Electric Capacitance Mixture Compositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance comparison of looped thermoacoustic electric generators with various thermoacoustic stages

et al. 2019

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“…In other words, choosing a route to achieve the desired goal is not definitive. In order to apply ACO for a problem, memory, artificial obstacles, and living in a discrete environment must be investigated [34,35], respectively. The first one enables researchers to store the route of the moment.…”

Section: Ant Colony Optimization (Aco)mentioning

confidence: 99%

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

Zare

Shourangiz-Haghighi

2018

Int J Energy Environ Eng

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This paper focuses on higher order modeling and design of the free-piston Stirling engine (FPSE) based on Ant Colony Optimization (ACO). First, the governing thermodynamics and dynamical equations of the engine have been derived. Then, the design parameters of the engine are selected taking into account the finite heat transfer coefficient (resulting in a fifth-order model) and pressure drop (resulting in a sixth-order model) in the dynamical system and the corresponding differential equations are derived in detail. In the following, the mentioned methods and their performance in modeling the FPSE dynamics are investigated. The simulated results show that the effect of the pressure drop on the places of the closed-loop poles of the system is not significant, while the heat transfer coefficient has a considerable effect on the engine dynamics. Accordingly, a fifth-order model along with ACO algorithm is proposed to justify the FPSE behavior. To validate the presented modeling scheme, the prototype engine SUTECH-SR-1 was experimented. It is found that the values of parameters obtained from the proposed design method are close to those of the experiment. Besides, the presented higher order model predicts the engine behavior with an acceptable accuracy through which the validity of the design technique is affirmed. Initial pressure of working gas (Pa) P w Power generation (J/s) P Nonlinear pressure (Pa) R Ideal gas constant J kgVolume of expansion space m

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“…Stirling engines have been tested and analysed for three main configurations: the alpha-type [1,2], beta-type [3][4][5][6] and gamma-type [7][8][9][10]. There have been thorough reviews of the Stirling engine by Kongtragool and Wongwises [11], Thombare and Verma [12] and Wang et al [13]. The research of the Ericsson engine is not as extensive as the Stirling engine, but the Ericsson cycle was examined in a past study [14], as well as an open cycle Ericsson engine equipped with valves was analysed [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Net Work Output between Stirling and Ericsson Cycles

Costa

MacDonald

2018

Energies

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Abstract:In this paper, we compare Stirling and Ericsson cycles to determine which engine produces greater net work output for various situations. Both cycles are for external heat engines that utilize regenerators, where the difference is the nature of the regeneration process, which is constant volume for Stirling and constant pressure for Ericsson. This difference alters the performance characteristics of the two engines drastically, and our comparison reveals which one produces greater net work output based on the thermodynamic parameters. The net work output equations are derived and analysed for three different scenarios: (i) equal mass and temperature limits; (ii) equal mass and pressure or volume; and (iii) equal temperature and pressure or volume limits. The comparison is performed by calculating when both cycles produce equal net work output and then analysing which one produces greater net work output based on how the parameters are varied. In general, the results demonstrate that Stirling engines produce more net work output at higher pressures and lower volumes, and Ericsson engines produce more net work output at lower pressures and higher volumes. For certain scenarios, threshold values are calculated to illustrate precisely when one cycle produces more net work output than the other. This paper can be used to inform the design of the engines and to determine when a Stirling or Ericsson engine should be selected for a particular application.

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Stirling cycle engines for recovering low and moderate temperature heat: A review

Cited by 181 publications

References 92 publications

Performance comparison of looped thermoacoustic electric generators with various thermoacoustic stages

Performance comparison of looped thermoacoustic electric generators with various thermoacoustic stages

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

Comparison of the Net Work Output between Stirling and Ericsson Cycles

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