A comparative study of PCM melting process in a heat pipe-assisted LHTES unit enhanced with nanoparticles and metal foams by immersed boundary-lattice Boltzmann method at pore-scale

Ren, Qinlong; Meng, Fanwei; Guo, Penghua

doi:10.1016/j.ijheatmasstransfer.2018.01.046

Cited by 124 publications

(27 citation statements)

References 41 publications

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“…Their research showed that, to make the most of natural convection and save cost, the porous medium should be placed in the lower part of the tube and the optimal filling height ratio was 0.7. For the pore-scale simulation on the phase change heat transfer in porous ss-PCMs, the following assumptions are usually made [69,107]:…”

Section: Cylindrical Containermentioning

confidence: 99%

A review of phase change heat transfer in shape-stabilized phase change materials (ss-PCMs) based on porous supports for thermal energy storage

Zhang

Feng

Shi

et al. 2021

Renewable and Sustainable Energy Reviews

362

107

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Latent heat thermal energy storage (LHTES) uses phase change materials (PCMs) to store and release heat, and can effectively address the mismatch between energy supply and demand. However, it suffers from low thermal conductivity and the leakage problem. One of the solutions is integrating porous supports and PCMs to fabricate shape-stabilized phase change materials (ss-PCMs). The phase change heat transfer in porous ss-PCMs is of fundamental importance for determining thermalfluidic behaviours and evaluating LHTES system performance. This paper reviews the Highlights: 1. The recent advances in experimental and numerical investigations on phase change heat transfer in porous ss-PCMs are reviewed. 2. Paraffin and metal foams are the mostly used PCM and porous support respectively in the experimental studies. 3. Compared to REV-scale simulation, the pore-scale simulation can provide extra flow and heat transfer characteristics in pores. 4. There exists a research gap between phase change heat transfer and material preparation.

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Section: Cylindrical Containermentioning

confidence: 99%

A review of phase change heat transfer in shape-stabilized phase change materials (ss-PCMs) based on porous supports for thermal energy storage

Zhang

Feng

Shi

et al. 2021

Renewable and Sustainable Energy Reviews

362

107

View full text Add to dashboard Cite

show abstract

“…Besides, the tradeoff between consolidating the conduction heat transfer and weakening the convective heat transfer through decreasing the metal foam porosity needs further attention and investigation. Ren et al completed a pore-scale comparative study of nanoparticle-enhanced PCM melting in a heat pipe-assisted LHTES unit with metal foams [166]. The melting process of NEPCM in a LHTES cavity filled with metal foams using a heat pipe at the Fourier number Fo ¼ 0:06, pore size d p ¼ 1 mm, and heat pipe radius R ¼ 2mmisshowninFigure 16.…”

Section: Pcm With Hybrid Heat Transfer Enhancement Techniquesmentioning

confidence: 99%

Heat Transfer Enhancement Technique of PCMs and Its Lattice Boltzmann Modeling

Qu¹

2019

Thermal Energy Battery With Nano-Enhanced PCM

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Phase change materials (PCMs) have several advantages for thermal energy storage due to their high energy storage density and nearly constant working temperature. Unfortunately, the low thermal conductivity of PCM impedes its efficiency of charging and discharging processes. To solve this issue, different techniques are developed to enhance the heat transfer capability of PCMs. In this chapter, the common approaches, which include the use of extended internal fins, porous matrices or metal foams, high thermal conductivity nanoparticles, and heat pipes for enhancing the heat transfer rate of PCMs, are presented in details. In addition, mathematical modeling plays a significant role in clarifying the PCM melting and solidification mechanisms and directs the experiments. As a powerful mesoscopic numerical approach, the enthalpy-based lattice Boltzmann method (LBM), which is robust to investigate the solid-liquid phase change phenomenon without iteration of source terms, is also introduced in this chapter, and its applications in latent heat thermal energy storage (LHTES) unit using different heat transfer enhancement techniques are discussed.

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“…thermal energy storage, Nano-PCM, foams Ren et al [17] have numerically investigate the melting process of the PCM of a TES system with nanoparticles and Modelling, Measurement and Control B…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on Nano-PCM in aluminum foam in latent thermal energy storages

Buonomo¹,

Ercole²,

Manca³

et al. 2018

MMC_B

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Thermal storage system (TES) with phase change material (PCM) is an important device to store thermal energy. It works such a thermal buffer to reconcile the supply energy with the energy demand. It has a wide application field especially for solar thermal energy storage. The main drawback is the low value of thermal conductivity of the PCM making the system useless for the thermal engineering applications. A way to resolve this problem is to combine the PCM with a highly conductive material like metal foam and/or nanoparticles. In this paper a numerical investigation on the metal foam effects into the latent heat thermal energy storage system, based on a phase change material with nanoparticles (Nano-PCM), is accomplished. The modelled TES is a typical 70L water tank filled up with Nano-PCM with pipes to transfer thermal energy from a fluid to the Nano-PCM. The PCM is a pure paraffin wax and the nanoparticles are in aluminum oxide. The metal foam is made of aluminum with assigned values of porosity. The enthalpyporosity theory is employed to simulate the phase change of the Nano-PCM and the metal foam is modelled as a porous media. Numerical simulations are carried out using the Ansys-Fluent code. The results are shown in term of melting time, temperature at varying of time and total amount of stored energy. Keywords:thermal energy storage, Nano-PCM, foams Ren et al. [17] have numerically investigate the melting process of the PCM of a TES system with nanoparticles and Modelling, Measurement and Control B

show abstract

A comparative study of PCM melting process in a heat pipe-assisted LHTES unit enhanced with nanoparticles and metal foams by immersed boundary-lattice Boltzmann method at pore-scale

Cited by 124 publications

References 41 publications

A review of phase change heat transfer in shape-stabilized phase change materials (ss-PCMs) based on porous supports for thermal energy storage

A review of phase change heat transfer in shape-stabilized phase change materials (ss-PCMs) based on porous supports for thermal energy storage

Heat Transfer Enhancement Technique of PCMs and Its Lattice Boltzmann Modeling

Numerical investigation on Nano-PCM in aluminum foam in latent thermal energy storages

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