Influence of misalignment and spacing on the pressure drop through wire mesh Stirling engine regenerators

York, Brayden T.; MacDonald, Brendan D.

doi:10.1016/j.enconman.2021.114588

Cited by 12 publications

(2 citation statements)

References 41 publications

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“…Conrad et al [4] determined the hydrodynamic parameters of wire mesh stacks using a 2-D CFD assisted methodology. Brayden et al [5] validate a 3-dimensional CFD model against previous empirical results, and use it to determine the effect of wire mesh misalignment on the pressure drop through a regenerator. "Secondorder" type 5 control volumes model, together with three-dimensional computational fluid dynamics modelling is utilized for analyzing reasons for low operational characteristics of a prototype of a biomass Stirling engine.…”

Section: Multi-dimensional Analysismentioning

confidence: 99%

Review of research on performance of stirling engine regenerators

2023

TNS

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The performance of Stirling engine regenerators has a huge influence on the efficiency of Stirling engines. Hence, the Stirling engine design process focuses on the study of the engine regenerator. To find out possible ways to improve regenerator performance, scholars from different countries have done a lot of research on analytical methods and factors affecting heat flow in the regenerator. Whereas, different ways of modelling are used in these studies, and the results are not organized so well. The present work aims to summarize and arrange other researchers work and then provide evidence for practical improvements and optimization. In addition, this work clearly shows the aspects of regenerator analysis, which enables new researchers to better find their orientation.

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Section: Multi-dimensional Analysismentioning

confidence: 99%

Review of research on performance of stirling engine regenerators

2023

TNS

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“…Chen's study [15] shows that the efficiency of regenerator depends on its material, matrix arrangement, matrix diameter and regenerator filling coefficient. York et al [16] studied the effect of wire mesh on neutral pressure drop by numerical method, and found that the pressure loss of a fully aligned regenerator can reduce by 38%-45%. Qiu et al [17] conclude that the pressure drops of regenerator accounts for more than 95% of the total pressure drop, and its maximum pressure drop increases almost linearly with the increase of rotational speed.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Experiment of Heat Transfer Performance of Straight-Channel Grid Regenerator

Wang¹,

Zhang²,

Zhang³

et al. 2022

IJHT

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The design of heat transfer performance of regenerator is the key technology of Stirling machine and is of great significance to ensure the operation efficiency of equipment. In this study the temperature difference between the two ends of regenerator at room temperature is less than 50K. This paper attempts to study the heat transfer performance of the straight channel grid regenerator at room temperature and verify its accuracy. At first, a straight-channel grid regenerator was designed in this study by analyzing the influence of structural parameters on the regenerator in order to reduce the flow resistance loss. The Pore Scale method and Representative Elementary Volume methods were combined to analyze the heat transfer characteristics of the grid regenerator. Compared with the wire mesh regenerator under the same condition, the straight-channel grid regenerator’s flow resistance could reduce by 96.2%. When the length-diameter ratio is 2:1 and the porosity is between 0.4 and 0.5, the heat transfer performance of the grid regenerator is satisfactory when it is applied in Stirling heat pump at room temperature. Then, A segmented variable porosity grid regenerator was designed based on the grid regenerator, and its performance was proved to be better than that of the grid regenerator. Finally, the two regenerators were developed based on additive manufacturing technology, and a single blow experiment platform was built. The experimental results fit well with the simulation results, with the maximum error being less than 1.5%. The experimental results prove the correctness of the model, which lays a foundation for the subsequent analysis of the periodic heat transfer characteristics of the straight-channel grid regenerator.

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