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A Second-Law Study on Packed Bed Energy Storage Systems Utilizing Phase-Change Materials | J. Sol. Energy …

Thermal modeling of packed bed, thermal energy storage systems has traditionally been limited to first-law considerations. The exceptions include a few second-law studies, noted in the Introduction, of sensible heat storage systems and the latent heat storage systems. The cited second-law studies treat the storage and removal processes …

Thermal Performance Analysis of Packed-bed Thermal Energy Storage with Radial Gradient Arrangement for Phase Change Materials …

Packed bed energy storage is a mature and widespread thermal energy storage technology, generally employing and pebbles/rocks [9,10] and phase change materials [11, 12] as the heat storage materials.

Thermal energy storage characteristics of packed bed encapsulating spherical capsules with composite phase change …

The applicability of packed bed latent thermal energy storage devices is restricted by the limited thermal conductivity of phase change materials (PCMs). As a cheap and simple heat transfer-enhanced construction, the hollow channel allows the heat transfer fluid to go through the capsule center directly where the melting rate of PCM would be …

Thermal performance analysis of multi-stage cold storage packed …

Packed bed cold storage integrates a large number of phase change materials (PCMs) in a low-cost way, improves heat transfer performance by providing a …

Packed bed regenerators using cascaded phase change …

Packed bed regenerator is a common solution for thermal energy storages, due to the large heat transfer area between TES materials and heat transfer fluid (HTF) [9]. …

Thermal performance analysis and optimization of cascaded packed bed latent heat storage tank | Journal of Renewable and Sustainable Energy …

The packed bed tank with multiple phase change materials (PCMs) is one of the most efficient latent heat energy storage techniques. This study presents insight into the influence of the latent heat arrangements on the cascaded packed bed tank, providing a new idea for designing multi-PCM packed bed tank, which concerns the screening of PCMs.

Charging performance of structured packed-bed latent thermal energy storage unit with phase change …

A mathematical model of the charging process for a structured packed-bed latent thermal energy storage unit with phase change material capsules is established. The thermal-hydrodynamic characteristics of the unit are investigated. The impacts of the heat transfer fluid inlet velocity, heat transfer fluid inlet temperature, initial temperature of …

Performance analysis of solar thermal storage systems with …

Thermal energy storage systems emerge as a promising solution, with phase change materials (PCMs) packed beds attracting attention for their compactness …

Thermal performance of the packed bed thermal energy storage system with encapsulated phase change …

A cylindrical latent heat thermal storage system having phase change material HS89 encased in spherical capsules and stacked in rows to form packed bed phase change material containment was ...

Stacked ensemble learning approach for PCM-based double-pipe latent heat thermal energy storage prediction towards flexible building energy ...

Stacked ensemble learning-based framework for phase change prediction. • Sensitivity analysis is introduced for key feature selection. • Prediction accuracy is enhanced with a minimum 3.06% of MAE for charging process. • It …

Numerical study of high-temperature cascaded packed bed thermal energy storage …

Thermal energy storage system in the form of packed bed with encapsulated phase change materials (EPCMs) can improve the thermal performance of the traditional latent heat storage system. According to Li et al. [ 10 ], the charging and discharging efficiency of a packed bed thermal energy storage system (PBTES) is …

Thermal and structural characterizations of packed bed thermal energy storage with cylindrical micro-encapsulated phase change …

Phase change material (PCM)-based thermal energy storage (TES) has attained significant attraction towards energy savings and ensures a continuous energy supply. However, the lower thermal conductivity of PCM impedes the efficient transfer in the storage systems, thereby causing longer charging time.

High-power-density packed-bed thermal energy storage using …

Efficient thermal energy storage technologies based on phase change materials (PCMs) that are capable of reversibly harvesting tremendous thermal energy …

Experimental and numerical study of cylindrical encapsulated phase change material in packed bed thermal energy storage …

An experimental setup is developed to assess the heat transfer performance of the packed bed latent heat thermal energy storage filled with cylindrical capsules containing PCM at a temperature range of 200–350 C. Fig. 1 shows the schematic diagram of the open flow loop and in-house developed experimental setup of a packed …

Chloroplast-granum inspired phase change capsules accelerate energy storage of packed-bed thermal energy storage …

Chloroplast-granum inspired phase change capsules accelerate energy storage of packed-bed thermal energy storage system July 2023 DOI: 10.1016/j.energy.2023.128563

Phase change material thermal energy storage design of packed …

Heat transfer enhancement and optimization are found to be essential for the PCM (phase change material) thermal energy storage design. In this work, the performance …

Assessment of energy and cost analysis of packed bed and phase change material thermal energy storage systems for the solar energy …

These systems were the packed bed (PBTES) and phase change material (PCM) thermal energy storage systems, respectively. Pebble stones were utilized as energy storage material in PBTES, while paraffin wax with a melting temperature of 55–60 °C was used in PCM.

Investigation of a packed bed energy storage system with …

In the present study, a two-dimensional CFD approach has been chosen to investigate heat transfer in a packed bed filled with phase change materials (PCM) capsules. In this research, four different geometries, circular, hexagonal, elliptical, and square, are considered PCM packages made of KNO3 covered with a copper layer and …

Thermal performance simulations of a packed bed cool thermal energy storage system using n-tetradecane as phase change …

The Cool Thermal Energy Storage (CTES) system proves to be a viable solution for energy storage by utilizing Phase Change Materials (PCM) during off-peak times. This stored energy can then be effectively utilized to …

Numerical Simulation Research on Thermal Energy Storage …

Latent heat storage technology is an efficient way of heat storage due to its high energy storage density and stable energy storage temperature. Cascaded latent …

Thermal performance analysis of packed-bed thermal energy storage with radial gradient arrangement for phase change …

The current paper investigates the radial gradient arrangement of phase change material capsules effect on the thermal behavior of a packed-bed latent thermal energy storage system. A transient two-dimensional dispersion-concentric model is developed to analyze the phase transition of phase change materials.

Phase change material thermal energy storage design of packed …

Heat transfer enhancement and optimization are found to be essential for the PCM (phase change material) thermal energy storage design. In this work, the …

Performance investigation on the cascaded packed bed thermal energy storage system with encapsulated nano-enhanced phase change …

The eight-fin storage system increases the daily charging capacity, thermal energy storage, thermal energy storage rate, and average effectiveness during melting by 146.0%, 133.8%, 123.5%, and 109.0%, …

Phase change material-based thermal energy storage …

Phase change material (PCM)-based thermal energy storage significantly affects emerging applications, with recent advancements in enhancing heat capacity and cooling power. This perspective by Yang et al. discusses …

An analysis of a packed bed thermal energy storage system using sensible heat and phase change …

Thermal energy storage is an important subsystem of a solar thermal power station. Compared with the two-tank storage system, the packed bed storage system uses a single tank to store thermal energy temporarily and release it when the energy is needed. The ...

Phase change material thermal energy storage design of packed …

A Comprehensive Parametric CFD Investigation on Packed Bed Thermal Energy Storage System with Encapsulated Solid–Solid Phase Change Materials in …

Phase change material thermal energy storage design of packed bed …

Heat transfer enhancement and optimization are found to be essential for the PCM (phase change material) thermal energy storage design. In this work, the performance advantage of the packed bed PCM storage unit design is analyzed in comparison, and the impacts of key geometric parameters of a packed bed unit were numerically investigated.

High-power-density packed-bed thermal energy storage using form-stable expanded graphite-based phase change …

Phase change materials (PCMs) have garnered significant attention as a prospective solution for photothermal energy storage, attributed to their notable energy density. Nonetheless, the constrained thermal conductivity of PCMs leads to delayed heat storage from the photothermal conversion surface, causing a build-up of heat at the …

Stabilization of the outflow temperature of a packed-bed thermal energy storage by combining rocks with phase change …

Thermal performance of pure silicon as Phase Change Material (PCM) has been numerically investigated in a packed bed latent heat thermal energy storage. Hot air was selected as the Heat Transfer ...