scholarly journals Thermal behavior of Composite Material (nanoPCM/aluminum foam) used for thermal energy storage (TES) applications

2020 ◽  
Vol 21 (3) ◽  
pp. 233-252
Author(s):  
H. Mhiri ◽  
A. Jemni ◽  
H. Sammouda
Keyword(s):  
Composite Material ◽  
Energy Storage ◽  
Thermal Behavior ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Aluminum Foam

NUMERICAL PREDICTION OF PARAFFIN COMPOSITE THERMAL BEHAVIOR FOR THERMAL ENERGY STORAGE

2017 ◽  
Vol 73 (8) ◽  
Author(s):  
Najoua Mekaddem ◽  
Samia Ben-Ali ◽  
Magali Fois ◽  
Atef Mazioud ◽  
Ahmed Hannachi
Keyword(s):  
Energy Storage ◽  
Thermal Behavior ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Numerical Prediction

scholarly journals Performance Evaluation of a Small-Scale Latent Heat Thermal Energy Storage Unit for Heating Applications Based on a Nanocomposite Organic PCM

2019 ◽  
Vol 3 (4) ◽  
pp. 88 ◽  
Author(s):  
Maria K. Koukou ◽  
George Dogkas ◽  
Michail Gr. Vrachopoulos ◽  
John Konstantaras ◽  
Christos Pagkalos ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Energy Storage ◽  
Thermal Behavior ◽  
Latent Heat ◽  
Flow Rate ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Heat Transfer Fluid ◽  
Small Scale ◽  
Solidification Processes

A small-scale latent heat thermal energy storage (LHTES) unit for heating applications was studied experimentally using an organic phase change material (PCM). The unit comprised of a tank filled with the PCM, a staggered heat exchanger (HE) for transferring heat from and to the PCM, and a water pump to circulate water as a heat transfer fluid (HTF). The performance of the unit using the commercial organic paraffin A44 was studied in order to understand the thermal behavior of the system and the main parameters that influence heat transfer during the PCM melting and solidification processes. The latter will assist the design of a large-scale unit. The effect of flow rate was studied given that it significantly affects charging (melting) and discharging (solidification) processes. In addition, as organic PCMs have low thermal conductivity, the possible improvement of the PCM’s thermal behavior by means of nanoparticle addition was investigated. The obtained results were promising and showed that the use of graphite-based nanoplatelets improves the PCM thermal behavior. Charging was clearly faster and more efficient, while with the appropriate tuning of the HTF flow rate, an efficient discharging was accomplished.

scholarly journals A Numerıcal Investıgatıon of The Thermal Behavıor of Dıfferent Phase Change Materıals In Thermal Energy Storage Systems

2021 ◽  
Author(s):  
Mehmet Kan
Keyword(s):  
Thermal Conductivity ◽  
Energy Storage ◽  
Thermal Behavior ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Storage System ◽  
Energy Storage System ◽  
Thermal Energy Storage System ◽  
Thermal Energy Storage Systems

Abstract Phase change materials (PCM) are widely used in thermal energy storage systems due to their high heat storage properties. However, due to the low thermal conductivity of PCMs, different surface areas are employed in order to increase the amount of energy. One of these methods is to use fins with high thermal conductivity. This study numerically investigated the thermal behavior of different PCMs (paraffin, paraffin wax, polyethylene glycol 6000) during the melting process in a thermal energy storage system with 15 fins. A FOX 50 heat flow meter was used for thermal conductivity measurements of these PCMs, and TA DSC Q200 (Differential Scanning Calorimetry) devices were used for specific heat measurements. The thermal property data of these measured PCMs were used in a time-dependent analysis. With the PCM data obtained, time-dependent thermal analyses were carried out using the Ansys-Fluent program based on the Computational Fluid Dynamics (CFD) method. The effect of these different PCMs on the melting processes was investigated by using water at 75oC in a 15-fin thermal storage system by observing their thermal behavior in the thermal energy storage system. In addition, cost analyses were conducted by determining the required amount of PCMs for the thermal storage system.

scholarly journals Morphological and Structural Evaluation of Hydration/Dehydration Stages of MgSO4 Filled Composite Silicone Foam for Thermal Energy Storage Applications

2020 ◽  
Vol 10 (2) ◽  
pp. 453
Author(s):  
Elpida Piperopoulos ◽  
Luigi Calabrese ◽  
Paolo Bruzzaniti ◽  
Vincenza Brancato ◽  
Valeria Palomba ◽  
...  
Keyword(s):  
Composite Material ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Morphological Evolution ◽  
Environmental Scanning Electron Microscopy ◽  
Differential Scanning Calorimetric ◽  
Salt Hydrates ◽  
Pure Salt ◽  
Set Up

Salt hydrates, such as MgSO4∙7H2O, are considered attractive materials for thermal energy storage, thanks to their high theoretical storage density. However, pure salt hydrates present some challenges in real application due to agglomeration, corrosion and swelling problems during hydration/dehydration cycles. In order to overcome these limitations, a composite material based on silicone vapor-permeable foam filled with the salt hydrate is here presented. For its characterization, a real-time in situ environmental scanning electron microscopy (ESEM) investigation was carried out in controlled temperature and humidity conditions. The specific set-up was proposed as an innovative method in order to evaluate the morphological evolution of the composite material during the hydrating and dehydrating stages of the salt. The results evidenced an effective micro-thermal stability of the material. Furthermore, dehydration thermogravimetric/differential scanning calorimetric (TG/DSC) analysis confirmed the improved reactivity of the realized composite foam compared to pure MgSO4∙7H2O.

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