Performance analysis of a stand-alone thermal energy storage system based on CSM plates filled with phase change material

Hassan, Hafiz Muhammad Adeel; Hansen, Mads Peter Rudolph; Dallaire, Jonathan; Larsen, Martin Anker Boesen; Kieseritzky, Esther; Alexandersen, Joe; Veje, Christian; Lund, Ivar

doi:10.1016/j.enbuild.2022.112621

Cited by 5 publications

(8 citation statements)

References 33 publications

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“…It can be seen that the pressure drop is increasing for larger flow velocities and decreases for larger channel height. This is exactly as expected due to simple fluid resistance principles and was also observed in the experimental tests [1]. It can further be seen that the error between the pressure drops obtained from the reduced-dimensional model and the full three-dimensional model varies within a range of 1% to 10% and that the pressure drops from the reduced-dimensional model are all lower than the pressure drops from the threedimensional model.…”

Section: Comparison Of Sliced Two-channel Modelsupporting

confidence: 87%

“…For the physical TES systems in mind [1,2], the symmetry of the velocities flowing into the channels between the plates is unlikely based on unpublished data. In order to study the relative effect of varying asymmetry, a simple nonsymmetric velocity profile is defined as a piecewiese function as follows:…”

Section: Different Inlet Velocity Profilesmentioning

confidence: 99%

“…The dimples with very small spacing have large resistance, which eliminates the difference in inlet velocity and results in uniform outlet velocity profiles with alternating peaks and valleys. Inspired by the studies on the standalone system by Hassan et al [1], the effect of plate spacing on the velocity distribution is investigated.…”

Section: Effect Of Average Inlet Velocity Magnitudementioning

confidence: 99%

“…The presented work stems from a project to design a thermal energy storage (TES) system based on stacks of Compact Storage Module (CSM) plates filled with phase change material (PCM) [1,2] to be integrated into building ventilation systems [3]. TES systems play a critical role in sustainable energy production and consumption.…”

Section: Introduction 1motivationmentioning

confidence: 99%

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Application of a Reduced-Dimensional Model for Fluid Flow between Stacks of Parallel Plates with Complex Surface Topography

Sun

Hassan

Alexandersen

2023

Fluids

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Stacked plate heat exchangers are widely used in thermal energy storage systems and a comprehensive and accurate analysis is necessary for their application and optimization. The fluid flow distribution between the plates is important to ensure even and full usage of the thermal energy storage potential. However, due to the complex topography of the plate surface, it would be computationally expensive to simulate the flow distribution in the multiple channels using a full three-dimensional model, so this work applies a reduced-dimensional model to significantly reduce the computational cost of the simulation and provides a comprehensive analysis of the effect of the internal structure on the internal flow distribution. The work extends a previously presented model to consider transient flow and a multichannel height distribution strategy to allow for simulating multiple channels between stacks of plates. Based on fully-developed flow assumptions, the three-dimensional model is reduced to a planar model, thus obtaining simulation results with satisfactory accuracy at a significantly lower computational cost. The model is verified by a three-dimensional simulation of a sliced two-channel model representing the considered system. The reduced-dimensional model gives similar results to the three-dimensional model for different geometrical and physical parameters. Lastly, the extended reduced-dimensional model is used to simulate the flow of a full two-channel model and the influence of the plate topography on the internal flow distribution is investigated through a comprehensive parametric analysis. The analysis shows that the complex topography of the plate surface eliminates the variation in inlet velocity and significantly changes the internal fluid flow, eventually resulting in a consistent velocity distribution.

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Section: Comparison Of Sliced Two-channel Modelsupporting

confidence: 87%

Section: Different Inlet Velocity Profilesmentioning

confidence: 99%

Section: Effect Of Average Inlet Velocity Magnitudementioning

confidence: 99%

Section: Introduction 1motivationmentioning

confidence: 99%

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Application of a Reduced-Dimensional Model for Fluid Flow between Stacks of Parallel Plates with Complex Surface Topography

Sun

Hassan

Alexandersen

2023

Fluids

Self Cite

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show abstract

“…The particular system that inspired this work is a thermal energy storage (TES) system based on stacks of compact storage module plates filled with phase change material (PCM) (Hassan et al 2023;Dallaire et al 2022) to be integrated into building ventilation systems (Veje et al 2019). To simplify the model for initial developments and demonstrations of the power of reduced-dimensional models, the plate temperatures are assumed to be predefined and constant.…”

Section: Motivationmentioning

confidence: 99%

Topography Optimisation Using a Reduced-Dimensional Model for Convective Heat Transfer between Plates with Varying Channel Height and Constant Temperature

2022

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Topography optimisation using a reduced-dimensional model for convective heat transfer between plates with varying channel height and constant temperature

Sun,

Yao,

Alexandersen

2023

Struct Multidisc Optim

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This paper proposes a reduced-dimensional model for the structural optimisation of conjugate heat transfer between parallel plates with constant temperature and a fluid channel of varying height. The model considers heat conduction and convection through a planar reduced-dimensional version of the convection-diffusion equation. To significantly reduce the computational time for the optimisation process, assumptions on the through-thickness velocity and temperature fields are made, allowing to transform a three-dimensional problem to a two-dimensional one. The accuracy and limitations of the model are investigated through an in-depth parametric analysis and are seen to be acceptable in the context of optimisation when considering the reduced computational cost. To allow for the optimisation of varying topology and topography, the local channel height is linearly interpolated based on the design field. The height parametrisation combined with the reduced-dimensional model provides physical meaning to intermediate design variables and removes the traditional requirement of 0–1 discrete solutions for topology optimisation. This allows the free switch between topology and topography optimisation, but it is illustrated through various examples that only topography changes are relevant for the treated problems. Two optimisation examples, a square heat exchanger and a manifold heat exchanger, demonstrate that the reduced-dimensional model is sufficiently accurate to be applied to structural optimisation. In comparison with shape optimisation using a full three-dimensional model, it is demonstrated that topography optimisation using the reduced-dimensional model can achieve equivalent optimised designs at a significantly lower computational cost. Graphical abstract

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Performance analysis of a stand-alone thermal energy storage system based on CSM plates filled with phase change material

Cited by 5 publications

References 33 publications

Application of a Reduced-Dimensional Model for Fluid Flow between Stacks of Parallel Plates with Complex Surface Topography

Application of a Reduced-Dimensional Model for Fluid Flow between Stacks of Parallel Plates with Complex Surface Topography

Topography Optimisation Using a Reduced-Dimensional Model for Convective Heat Transfer between Plates with Varying Channel Height and Constant Temperature

Topography optimisation using a reduced-dimensional model for convective heat transfer between plates with varying channel height and constant temperature

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