Thermal energy storage with phase change materials (PCMs) is a promising technology to improve energy efficiency in the fields of renewable energy, …
The aim of this paper is to study the influence of enclosure size in latent heat thermal energy storage systems embedded in a porous medium for domestic usage of latent heat thermal energy storage heat exchangers.10. Al-Abidi AA, …
This approach is to enhance the energy transport where phase change occurs. Besides this, porous media can also be inserted into HTF domain to extract more energy from HTF; i.e. this improves the driving force for …
Consider a rectangular enclosure, which represents a simplified thermal energy storage system, of width L and height H as shown schematically in Fig. 1 (a).The enclosure, bounded by impermeable walls, is filled with a …
In this paper, melting performance of phase change materials (PCMs) in a horizontal concentric–tube thermal energy storage (TES) unit was numerically investigated with consideration of natural convection. Porous media …
Thus the called Phase Change Materials (PCM) allow for lower volume and weight in heat storage and thermal management units with respect to only use the sensible heat. These advantages have ...
Phase change in porous media occurs in the confines of the pore space but it is driven by the application of a supersaturation at the external boundaries of the porous medium. Intermolecular forces between the fluids and the pore surface and the transport of mass or heat within the pore structure, therefore, determine phase equilibria …
In the simplest situation of a large bed of small rigid spheres of uniform diameter, flow in the pore space can be represented by Darcy''s law [].As discussed in Chap. 1, this relationship, stated at the scale of the representative elementary volume (REV), arises from volume-averaging Navier–Stokes equations at the low Reynolds number limit …
In this paper, to promote the efficiency of energy storage and utilization, porous skeleton structures (PSS) are embedded in the phase change materials (PCM) as thermal conductivity enhancers. Then numerical models are established to evaluate the thermal performance and energy storage characteristics.
On the basis of the method, porous theory solved 2-D solid-liquid phase change melting process in porous media. Numerical results show that porous media …
1. IntroductionMoving boundary problems in porous media have practical relevance in nature and in the field of engineering. Applications range from freezing of biological tissues, thermal energy storage, cooling of electronic equipment to food processing. Solidification ...
Thermal energy storage is an efficient energy storage technology that absorbs and releases stored heat, thereby reducing the gap between energy supply and consumption. Phase Change Materials (PCMs) are widely used as energy storage materials and can be classified into four categories according to their physical form [2].
Thermal energy storage. With the sharp increase in modern energy consumption, phase change composites with the characteristics of rapid preparation are …
Keywords Theory of porous media · Phase-change materials · Phase-field modeling · Heat transfer enhancement 1 Introduction Energy storage is an important process for conserving the available and excess energy and improving its utilization. A well-designed ...
Phase change material (PCM)-based thermal energy storage significantly affects emerging applications, with recent …
Phase change material-based thermal energy storage
features of the two-phase region. Graded porous media exhibited much better cooling performance than uniform pore topology. ... Energy storage of low potential heat using lithium hydroxide based sorbent for domestic heat supply J. Clean Prod., 285 ...
The conceptual model built to evaluate hydrogen storage in porous media (left) and changes in the pressure of methane and hydrogen as the hydrogen injection continues. In this model, it was assumed that mineral interactions (dissolution and precipitation) in a hydrogen storage site are controlled by five main mechanisms.
LHTES, as seen in Fig. 1, is a kind of passive energy storage in the system that is based on phase change materials (PCMs).PCMs save the latent heat energy in their phase transition. Based on their properties, these materials are divided into three types: organic ...
Numerical modeling for solid-liquid phase change phenomena in porous media: Shell-and-tube type latent heat thermal energy storage Appl. Energy, 112 ( 2013 ), pp. 1222 - 1232, 10.1016/j.apenergy.2013.02.022
For the cryosuction-induced fractures in saturated porous media, the water freezing is treated as a phase-change process. This is modeled using a phase …
For the cryosuction-induced fractures in saturated porous media, the water freezing is treated as a phase-change process. This is modeled using a phase-field approach, in which the thermal energy ...
Heat Transfer in Porous Media: A Mini Review
Two-phase flow with phase change in microstructure or nanostructure is an important issue in many fronts and critical applications nowadays, but with a lack of comprehensive understanding of the mechanism. This paper numerically investigates the transient behavior of two-phase flow with liquid phase change in the porous media, …
PCM melting process in an energy storage chamber with porous metal foam gradient and discrete strip fins is examined. • A 42 % improvement in the melting process can be fund for he parabolic state of TM1 and TM4. • The highest thermal performance and >90 %
There are many kinds of phase change materials for energy storage, such as salt hydrates, molten salts, paraffin, sugar ... The performance of hydrogen desorption from a metal hydride with heat supply by a phase change material incorporated in porous media ...
A detailed experimental and analytical study has been performed to evaluate how copper porous foam (CPF) enhances the heat transfer performance in a cylindrical solid/liquid phase change thermal energy storage system. The CPF used in this study had a 95% porosity and the phase change material (PCM) was 99% pure …
Herein, for the first time, a one-pot one-step (OPOS) protocol is developed for synthesizing TiO 2-supported PCM composite, in which porous TiO 2 is formed in situ in the solvent of …
This paper introduces a numerical study of latent heat storage systems, based on phase-change materials (PCMs) with various heat transfer enhancement techniques. In this, three alternative systems ...
Infiltration of phase change materials (PCM) into highly conductive porous structures effectively enhances the thermal conductivity and phase change (solidification and melting) characteristics of the resulting thermal energy storage (TES) composites. However, the infiltration process contributes to formation of voids as micron-size air …
Storage of air or compressed gas in porous formations is a promising means of large-scale, long-term energy storage, but salt caverns have predominantly been used for storage to date. Porous formations are ubiquitous and have high capacities but introduce new, complex water–rock–working phase interactions due to their greater …
The aim of this paper is to study the influence of enclosure size in latent heat thermal energy storage systems embedded in a porous medium for domestic …