Numerical investigation of conjugate heat transfer in a pillow-plate heat exchanger

Zibart, Alexander; Kenig, Eugeny Y.

doi:10.1016/j.ijheatmasstransfer.2020.120567

Cited by 25 publications

(22 citation statements)

References 12 publications

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“…During the exothermic and endothermic reactions occurring from hydrogenation and dehydrogenation of the hydrogen storage metal or alloy, heat must be transferred from or into the reactor in a suitable manner. A very efficient heat exchanger that can be used for heat transfer, is the pillow plate heat exchanger [101]. In this design one fluid flows between two embossed plates (which have the shape of a pillow, figure 13) forming a flow channel and the second fluid flows outside the walls of the plates.…”

Section: Construction Of the Storage Tankmentioning

confidence: 99%

Hydride-based thermal energy storage

Buckley

Busch²,

Bunzel

et al. 2022

Prog. Energy

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The potential and research surrounding metal hydride (MH) based thermal energy storage is discussed, focusing on next generation thermo-chemical energy storage (TCES) for concentrated solar power. The site availability model to represent the reaction mechanisms of both the forward and backward MH reaction is presented, where this model is extrapolated to a small pilot scale reactor, detailing how a TCES could function/operate in a real-world setting using a conventional shell & tube reactor approach. Further, the important parameter of effective thermal conductivity is explored using an innovative multi-scale model, to providing extensive and relevant experimental data useful for reactor and system design. Promising high temperature MH material configurations may be tuned by either destabilisation, such as using additions to Ca and Sr based hydrides, or by stabilisation, such as fluorine addition to NaH, MgH2, or NaMgH3. This versatile thermodynamic tuning is discussed, including the challenges in accurately measuring the material characteristics at elevated temperatures (500 –700 °C). Attention to scale up is explored, including generic design and prototype considerations, and an example of a novel pilot-scale pillow-plate reactor currently in development; where materials used are discussed, overall tank design scope and system integration.

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Section: Construction Of the Storage Tankmentioning

confidence: 99%

Hydride-based thermal energy storage

Buckley

Busch²,

Bunzel

et al. 2022

Prog. Energy

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“…Another parameter exists to account for the difference between IC and OC areas since the latter is extended by the WSs [4]:…”

Section: Dimensionless Geometrical Parametersmentioning

confidence: 99%

“…Besides, structural integrity, withstanding high pressures and hermetically sealed construction are other beneficial assets for heat exchangers. Pillow-plate heat exchangers (PPHXs) meet these requirements and have found application in many industries (e.g., HVAC industry [1], food industry especially for dairy [2], chocolate and wine [3], and pulp and paper industry [4]).…”

Section: Introductionmentioning

confidence: 99%

Potentials and challenges for pillow-plate heat exchangers: State-of-the-art review

Joybari

Selvnes

Sevault

et al. 2022

Applied Thermal Engineering

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“…The inflated sheets, post-hydroforming, adopt a wavy shape and create a channel with a pillow-like structure for fluid flow. Initially employed in the food and paper industries [26], PPHEs have since expanded to cover a wide range of applications, including oil refining [27] and Heating, Ventilating, Air Conditioning, and Refrigeration (HVACR) systems [28].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Geometrical Parameters on Heat Transfer Performance in Pillow Plate Heat Exchangers Across Varied Reynolds Numbers

Rikandeh,

Jamei,

Abbasi

2024

Preprint

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This numerical simulation study investigates a pillow plate heat exchanger, exploring the influence of changes in pillow channel height, longitudinal, and transverse distances of welding points on Nusselt number, friction factor, and thermal performance across a range of Reynolds numbers from 1000 to 7000. The fluid inlet temperature is held constant at 298 K, with a heat flux of 5000 W/m² applied to both upper and lower plates in all simulations, providing a consistent basis for comparison. Firstly, the analysis delves into the effects of varying pillow channel height on heat transfer efficiency and fluid flow dynamics within the heat exchanger. Transitioning from a Reynolds number of 1000 to 7000, the friction factor is decreased by 43.2%, 45.7%, and 41.9% for channel heights of 3 mm, 5 mm, and 7 mm, respectively. Secondly, the study examines the impact of different longitudinal distances of welding points on key performance indicators such as Nusselt number, friction factor, and thermal performance. According to the acquired data, the Nusselt numbers for the highest Reynolds number are 175.439, 163.3, and 154.579 for models with longitudinal distances of the welding points ranging from 50 to 70 mm, respectively. Lastly, the research investigates how alterations in the transverse distances of welding points affect Nusselt number, friction factor, and overall thermal performance of the heat exchanger.

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Numerical investigation of conjugate heat transfer in a pillow-plate heat exchanger

Cited by 25 publications

References 12 publications

Hydride-based thermal energy storage

Hydride-based thermal energy storage

Potentials and challenges for pillow-plate heat exchangers: State-of-the-art review

Investigation of Geometrical Parameters on Heat Transfer Performance in Pillow Plate Heat Exchangers Across Varied Reynolds Numbers

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