Study on the energy performance enhancement of a new PCMs integrated hybrid system with the active cooling and hybrid ventilations

Khaled

Journal of Energy Storage

et al. 2021

207

Researchers worldwide are investigating thermal energy storage, especially phase change materials, for their substantial benefits in improving energy efficiency, sustaining thermal comfort in buildings and contributing to the reduction of environmental pollution. Residential buildings and commercial constructions, being dependent on heating and cooling systems, are subjected to the utilization of PCM technology through several applications. The current study presents a state-of-the-art review that covers recent literature on thermal energy storage systems utilizing PCMs for buildings. The reviewed applications are heating and hybrid applications, that are categorized as passive and active systems. A summary of the PCMs used, applications, thermo-physical properties and incorporation methods are presented as well. The study emphasizes the promising effectiveness of PCM in building heating applications, and highlights the significance of PCM system hybridization. The study shows that experimental investigations on commercial constructions, and hybrid systems development and optimization, are still required. Finally, possible combinations of active and passive heating applications with their auspicious benefits in terms of energy efficiency augmentation, are recommended. Highlights  State-of-the-art review on PCM building applications for heating and hybrid systems  Active and Passive classification for heating and hybrid systems  Challenges altering the PCM technology for energy-efficient buildings are addressed  Hybridization of active and passive systems forms a potential method toward NZEB

Section: Analysis Of Studied Hybrid Applicationsmentioning

confidence: 99%

A review on phase change materials for thermal energy storage in buildings: Heating and hybrid applications

Khaled

Journal of Energy Storage

et al. 2021

207

Renewable and Sustainable Energy Reviews

“…can be calculated by multiplying the quantity of energy consumption of a Trombe wall by its unit CO2 emissions. [15,27,[29][30][31]43,44,47,53,59,69,70,72,[75][76][77]80,81,83,85,87,93,105,114,[130][131][132][133]136,138,139,153,179,184,186,193,204,[211][212][213][214], heating load reduction [16,53,61,107,114,117,123,148,169,…”

Section: Outdoor Environmentmentioning

confidence: 99%

Classification, experimental assessment, modeling methods and evaluation metrics of Trombe walls

Wang

et al. 2020

Solar energy building applications are attracting increasing attention from researchers, engineers, businessmen and officials due to their significant benefits in sustainable development, such as energy saving, cost reduction and environmental protection. Trombe wall, as a classical passive solar heating technique, has been studied for many years. A variety of concepts, methodologies and experiences have been developed during relevant research. Especially in recent years, numerous studies on Trombe wall have been published, which implies a rising attention to this technique. This review focuses on the classification, experimental assessment, modeling methods, and evaluation metrics for Trombe wall. In detail, nine types of Trombe walls are introduced according to their materials, structures and functions. Four experimental methods and two modeling methods of Trombe wall are discussed based on their functions, advantages, disadvantages, and applicability. Three aspects of evaluation metrics for Trombe wall are summarized in terms of technique, economy and environment. Moreover, the current and future research of Trombe wall are discussed at the end. The authors consider this article would be useful for their peers and can facilitate the technical development of Trombe wall.

“…Recent studies focused on implementing PCMs as thermal energy storage into the hybrid system with active cooling and hybrid ventilation. Zhou et al [52] studied the numerical modeling of a system of hybrid PCMs working on the one hand as a ventilated Trombe wall integrating phase change materials (PCMs-VTW) and on the other as a photovoltaic/thermal system integrating a phase change material (PV/T-PCM). Based on the results obtained, the system is able to provide a stable indoor thermal environment.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigations of Composite Solar Walls Integrating Sensible or Latent Heat Thermal Storage

et al. 2020

This article studies a composite solar wall with latent storage (TES) designed to heat rooms inside buildings during the cold season. No numerical model of the composite solar wall is currently available in the Dymola/Modelica software library. The first objective of this work is to develop one such model. The article describes the elementary components, along with the equations that allow modeling the heat transfers and storage phenomena governing both the thermal behavior and performance of the solar wall. This model was built by assembling various existing basic elements from the software's "Building" library (e.g., models of heat transfer by convection, radiation and conduction) and then creating new elements, such as the storage element incorporating the phase change material (PCM). To validate this solar wall model, numerical results are compared to experimental data stemming from a small-scale composite solar wall manufactured in our laboratory, and the experimental set-up could be tested under real weather conditions. After verifying the level of confidence in the model, the energy performance of two solar walls, one with a conventional storage wall (sensible heat storage) the other containing a PCM (the same as in the experiment), are compared. The result indicates that the solar wall incorporating a PCM does not in this case release any more energy in the room to be heated. first assessment by E.S. Morse in the 19th century. It was subsequently redesigned as an architectural element by F. Trombe and J. Michel [11], as frequently acknowledged in published papers on: Trombe wall, Trombe-Michel solar wall, or composite solar wall. In current research dedicated to energy and environmental contexts, passive solar wall techniques are more relevant than ever, leading to the development of various passive configurations, namely: (a) the classical Trombe wall: engineering techniques [12], theoretical and experimental investigations of heat transfer [13], comparison of the effects of air flow rate between the one-dimensional and two-dimensional models [14], and the numerical study of thermal performance [15]; (b) the PCM Trombe wall: clay bricks integrating PCM macro-capsules functioning as the storage wall [16], thermal performance of a PCM storage wall in temperate and hot climates [17], a simulation study of building walls using the collector-storage wall integrating PCMs [18], a summary of the investigation and analysis conducted on systems incorporating PCMs as storage elements [19], the heat storage wall of the studied building ventilation using black paraffin wax [20], and experimental investigations of PCM wall thermal performance improved by delta winglet vortex generators [21]; (c) a composite Trombe wall with or without PCM: the numerical study of a composite Trombe wall model both with and without PCM in relying on the Dymola/Modelica software [22], numerical studies of the comparison between two walls using sensible heat (with concrete as the storage wall) by means of TRNSYS software [23], experiment...