Single and Multi-phase Change Materials Used in Cooling Systems

Abdolmaleki, L.; Berardi, Umberto

doi:10.1007/s10765-022-02989-z

Cited by 14 publications

(2 citation statements)

References 123 publications

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“…Their results indicated that the charged PCM ensured the stable operation of the cold storage for a period after shutdown, and that economic savings could be achieved by taking advantage of peak and valley electricity prices. Abdolmaleki and Berardi [26] analyzed the use of cooling systems with single-and multiphase change materials, considering both air conditioning systems and refrigerators. Their results showed that, compared to a single PCM configuration, multi-PCM configurations have the potential to improve heat transfer rates, reduce the gap between peak and off-peak loads of electricity demand, and shift electricity consumption from on-peak to off-peak periods.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Phase Change Material-Based Condenser of a Low-Scale Refrigeration System

Cavargna¹,

Mongibello

Iasiello³

et al. 2023

Energies

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This study concerns the numerical simulation and the experimental implementation of a low-scale Phase Change Material-based (PCM-based) condenser, to be included in a PCM-based portable cooling systems. In this category of cooling systems, the PCM can be integrated either in the condenser or in the evaporator. In the present study, the PCM is integrated in the condenser of the vapor compression cycle to absorb the heat power released from the refrigerant fluid (R134a) during condensation, thus eliminating the need to transfer heat to the external environment. The main objective of the present study is to realize and validate a numerical model capable of simulating both the refrigerant fluid and the PCM thermofluid dynamics. For this purpose, a commercial solver was used for the implementation of the developed numerical model, and experimental tests were performed to validate the numerical simulations results. The paper reports the details and test results of both the numerical model and the experimental apparatus. The simulation results indicate a good accordance between the numerical and experimental data.

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Section: Introductionmentioning

confidence: 99%

Analysis of a Phase Change Material-Based Condenser of a Low-Scale Refrigeration System

Cavargna¹,

Mongibello

Iasiello³

et al. 2023

Energies

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“…To aid in developing clean energy sources, many resources have been invested to explore the use of molten salts for a variety of energy applications which include thermal energy storage [1], concentrated solar power (CSP) [2], nuclear molten salt reactors (MSR) [3], and even in use in fusion reactors [4]. The thermophysical properties (density, viscosity, thermal conductivity, and heat capacity) of the salts used in these applications need to be accurately known.…”

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confidence: 99%

Use of a Needle Probe to Measure the Thermal Conductivity of Electrically Conductive Liquids at High Temperatures

Ruth,

Merritt,

Munro

2024

Preprint

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This paper considers the necessary conditions for using a derivative of a transient hot wire (termed a needle probe) approach to measure electrically conducting fluids at high temperatures, especially molten halide salts. The focus is on the development of a new theory based on a multi-layer system necessary to ensure electrical isolation of electrical wires from the surrounding fluid. This includes the use of a thin annulus of fluid to minimize convective heat transfer modes within the fluid of interest, which was inspired by the concentric cylinder method. Good measurements require the following considerations: concentricity of the probe and surrounding crucible to ensure a consistent fluid gap, accounting for corrections for deviation of the model at early times, and modeling radiation heat transfer through transparent fluids. Uncertainties are larger than transient hot wire methods because of the deviations from experimental conditions that can easily match an analytical approximation. An appropriate estimation of the measurement uncertainty can be obtained through careful design of the instrumentation, thorough uncertainty analysis, and limiting the measurements to only the applicable thermal property ranges of the approach. The 1D model used to interpret measured temperature data has been shown to be reliable for thermal conductivity measurements ranging from at least 0.39 W/mK to 0.92 W/mK and for temperatures from 293-1023 K. The approach is used to present thermal conductivity data of the molten salts NaCl-KCl (51-49 mol%) and LiCl-NaCl (28-72 mol%).

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Assessment of the Effects of Copper Oxide Nanoparticles Addition to Solar Salt: Implications for Thermal Energy Storage

Saranprabhu

Suganthi²,

Rajan³

2022

Int J Thermophys

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Single and Multi-phase Change Materials Used in Cooling Systems

Cited by 14 publications

References 123 publications

Analysis of a Phase Change Material-Based Condenser of a Low-Scale Refrigeration System

Analysis of a Phase Change Material-Based Condenser of a Low-Scale Refrigeration System

Use of a Needle Probe to Measure the Thermal Conductivity of Electrically Conductive Liquids at High Temperatures

Assessment of the Effects of Copper Oxide Nanoparticles Addition to Solar Salt: Implications for Thermal Energy Storage

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