Numerical correlation for the pressure drop in Stirling engine heat exchangers

Barreno, I.; Costa, S.; Cordón, Marta; Tutar, Mustafa; Urrutibeascoa, I.; Gómez, X.; Castillo, Gladys

doi:10.1016/j.ijthermalsci.2015.06.014

Cited by 26 publications

(15 citation statements)

References 21 publications

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“…Eq. (50) is a solution for the instantaneous value of the pressure drop per unit length in the axial direction of the flow (Schwendig 1992;Barreno et al, 2015). Eq.…”

Section: Pressure Dropmentioning

confidence: 99%

See 1 more Smart Citation

Mechanically Driven Oscillating Flow Cooling Loops – A Review

Cao¹,

Alam²,

Popoola³

2019

Frontiers in Heat and Mass Transfer

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The significant increase in the heat dissipation associated with the increased throughput in computing, renewable energy, and electric vehicles has become a limitation to the evolution of these technologies. The needs for more effective thermal-management methods for higher heat fluxes and more uniform temperature have resulted in the development of mechanically driven oscillating flow cooling systems. The objective of this paper is to review the state-of-the-art of mechanically driven oscillating flow loops (MDOFLs) in terms of several aspects such as heat transfer, fluid mechanics, and thermodynamic principles. In each aspect, essential formulas and related sciences from prior studies are presented to show what has been accomplished in the field. Important parameters on the performance of the cooling systems and challenges for future research are also provided.

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“…Eq. (50) is a solution for the instantaneous value of the pressure drop per unit length in the axial direction of the flow (Schwendig 1992;Barreno et al, 2015). Eq.…”

Section: Pressure Dropmentioning

confidence: 99%

“…(51) was derived for laminar reciprocating flow under the conditions of and while Eq. (52) is for turbulent reciprocating flow under the conditions of Barreno et al (2015). For a certain combination of flow parameters, a number of research works have been able to separate the frictional loss components from the pressure drop.…”

Section: Pressure Dropmentioning

confidence: 99%

Mechanically Driven Oscillating Flow Cooling Loops – A Review

Cao¹,

Alam²,

Popoola³

2019

Frontiers in Heat and Mass Transfer

View full text Add to dashboard Cite

show abstract

“…The in‐pipe flow of pressurized, inert gas (mostly helium, >60 bar) is associated with a pressure drop of 350 mbar at the maximum helium flow rate (which is 0 at the compression stage of the cylinder). The power loss associated with this friction represents ∼2 % of the final net work output of the engine, as predicted by the calculation method of Urieli and Berchowitz and updated subsequently, for example, by Ohio University and Barreno et al …”

Section: Introductionmentioning

confidence: 96%

“…Thep ower loss associated with this friction represents~2% of the final net work output of the engine,a sp redicted by the calculation method of Urieli and Berchowitz [7] and updated subsequently,f or example,b yO hio University [20] and Barreno etal. [21] In the present study,t wo major improvements are considered that form the objectives of the research:…”

Section: Introduction Energy Resources and The Use Of Heat Enginesmentioning

confidence: 99%

Use of Particle Heat Carriers in the Stirling Engine Concept

Zhang

Gowing²,

Degrève

et al. 2016

Energy Tech

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The Stirling engine has drawn new attention for its high efficiency and flexibility towards the application of different heat sources. A new Stirling engine application in a renewable energy combined heat and power (CHP) concept will be presented, in which powders are used as the heat carrier between the hot storage and the ultimate Stirling reuse. A fluidized bed of small particles (50–150 μm) is examined in this study. The outside heat transfer coefficient to the finned Stirling heat exchanger largely exceeds 1500 W m−2 K−1 at very low fluidization velocities, which is, therefore, not the heat transfer limitation. Positron emission particle tracking experiments demonstrated that the particle movement and mixing in the fluidized bed are not hampered by the presence of the finned heat transfer tube. As the Stirling engine can reach efficiencies in excess of 30 % and has the potential to be integrated in a CHP mode of operation, it should be considered as a hot research topic in the renewable energy sector.

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“…Although the second-and third-order models have achieved acceptable range of accuracy in Stirling engine modeling, there are some constraints that prevent achieving higher degrees of accuracy. The dependence on steady unidirectional flow rather than unsteady flow correlations, for heat transfer and fluid friction encountered in heat exchangers, may lead to the discrepancy in results [19]. Furthermore, the rates of heat transfer in compression and expansion spaces cannot be accurately predicted by the assumption of uniform temperature distribution and constant heat transfer coefficients which are usually adopted by several models [20].…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation and Losses Analysis of a Beta-Type Stirling Engine

Mikhael

El-Ghandour

El-Ghafour

2018

Port-Said Engineering Research Journal

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A three-dimensional Computational Fluid Dynamics (CFD) simulation for the beta-type Stirling engine is performed. Firstly, a thorough characterization of the thermal and fluid flow fields during the cycle is presented. Secondly, a comprehensive energy analysis for the engine is conducted to accurately identify the sources and magnitudes of thermodynamic losses. Computational results show a close agreement with the experimental results with an accuracy of about 96%. Within the compression and expansion spaces, the dominant heat transfer rates occur during the expansion strokes due to the significant impinging effect of the tumble vortices generated from the flow jetting. Furthermore, the jetting and ejecting processes into the regenerator is characterized by a significant temperature gradient and a large matrix temperature oscillation. The pressure difference between the expansion and compression spaces is the main driver for the flow leakage through the appendix gap. From the energy analysis, the regenerator thermal loss and the pumping power represent the largest part of the Stirling engine losses by about 9.2% and 7.5%, respectively.

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Numerical correlation for the pressure drop in Stirling engine heat exchangers

Cited by 26 publications

References 21 publications

Mechanically Driven Oscillating Flow Cooling Loops – A Review

Mechanically Driven Oscillating Flow Cooling Loops – A Review

Use of Particle Heat Carriers in the Stirling Engine Concept

CFD Simulation and Losses Analysis of a Beta-Type Stirling Engine

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