Parametric investigation of hybrid regenerator of a stirling cryocooler

Kumar, Kishor V V; Kuzhiveli, Biju T.

doi:10.5958/2349-2120.2016.00010.8

Cited by 2 publications

(2 citation statements)

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“…Where: Hydraulic diameter of porous media zone can be calculated from the following equation: (13) The inter-phase Nusselt Number Nui correlation for wired mesh porous media is calculated as [22]:…”

Section: Governing Equationsmentioning

confidence: 99%

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Influence of Using Straight and Twisted Elliptical Section Heater Tubes on Stirling Engine Performance

Abdelhameed

Ahmed²,

Othman³

et al. 2022

JES. Journal of Engineering Sciences

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The heat transfer area of the heater tubes is a significant factor that deeply affects output power and thermal efficiency in Stirling engines. Alpha-type Stirling engine is concerned in this study. Circular section, elliptical section, twisted elliptical section tubes having twist ratios of 2, 3 and 4 are used as heater designs. 3D simulation model using SST K-ω turbulent model is used for simulating airflow through the hot cylinder, heater tubes, regenerator, cooler, and cold cylinder of the Stirling engine, during a complete engine cycle. The results showed that the elliptical section tubes are better than the circular section tubes. The maximum input energy rate, output work and thermal efficiency are achieved by using elliptical section with twist ratio of 2. These values are 4245.87 W, 1225.34 W and 29.55%, respectively with percentage increments of 5.2%, 7.47% and 3.76%, respectively relative to the circular section heater tubes.

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Section: Governing Equationsmentioning

confidence: 99%

“…Therefore, many researchers focused their work on the regenerator materials dimensions and porosity ratio. Kumar and Kuzhiveli [13] investigated the regenerator performance numerically under steady and unsteady flow conditions. They used different sizes of stainless-steel wire meshes.…”

Section: Introductionmentioning

confidence: 99%