Thermal behavior in dynamic regime of a multilayer roof provided with two phase change materials in the case of a local conditioned

Khaled

Journal of Energy Storage

et al. 2021

208

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: Hybrid Passive Methodsmentioning

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

208

IOP Conf. Ser.: Earth Environ. Sci.

“…Energy costs for cooling were lowered, and thermal comfort was increased owing to the roof's PCM coating. Hanchi et al [25] sutdied numerically the impact of integrating dual layers of distinct PCMs onto the roof surface under variable weather conditions. The PCM integration was beneficial for buildings as per the obtained results.…”

Section: Ceilings and Roofsmentioning

confidence: 99%

Phase change materials integrated buildings: A short review

Jacob,

Paul,

Selvaraj

et al. 2023

Buildings account for one-third of global energy consumption and 38% of greenhouse gas emissions. Improving a building’s energy efficiency is vital in minimizing climate change. As an alternative to active cooling systems, passive cooling methods are promising. Thermal energy storage employing latent heat is an effective passive cooling strategy for increasing a building’s thermal inertia and, in turn, reducing temperature fluctuations and improving thermal comfort for building occupants. To do this, high-density phase change materials (PCMs) for thermal energy storage (TES) can be put to good use. Recent developments in TES techniques using PCMs have gained much research focus, primarily to improve energy efficiency and promote clean energy sources. PCMs are regarded as the most promising materials due to their high energy storage density for developing high-performance and energy-efficient buildings. The primary disadvantage of PCM is its low thermal conductivity, limiting its practical usage, which could be resolved by loading nano or micro-sized conductive fillers. The investigated system’s initial findings show that they effectively lower indoor temperature changes and energy demand during winter seasons and can cause load reduction or shifting.

“…However, thermochemical TES systems are still commercially unavailable except in very limited applications, owing to their unknown life span and high costs [18]. Accordingly, TES techniques can be categorized mainly as latent or sensible [10], [39]. A comparison between sensible storage and latent storage is tabulated in Erreur !…”

Section: Phase Change Materials (Pcms)mentioning

confidence: 99%

“…The study showed that the effect of the semi-transparent property of the glazing and the zenith angle on temperature time lag, transmitted solar energy, and the total transmitted energy is large. In another numerical simulation, Hanchi et al [39] investigated the effect of adding two layers of different PCMs into the roof of a room subjected to variable weather conditions. The configuration of their roof design is illustrated in Figure 10.…”

Section: Ceilings and Roofsmentioning

confidence: 99%

Phase change material thermal energy storage systems for cooling applications in buildings: A review

Khaled

Renewable and Sustainable Energy Reviews

et al. 2020

332

Sharing of renewable energy and reduction of conventional energy consumption as an attempt to ameliorate environmental issues such as global warming has become the main concern for current developing scientific engineering research. Moreover, with the drastic increase in cooling and heating requirements in the building sector worldwide, the need for suitable technology that enables improvement in thermal performance of buildings is addressed. Utilizing phase change materials (PCMs) for thermal energy storage strategies in buildings can meet the potential thermal comfort requirements when selected properly. The current research article presents an overview of different PCM cooling applications in buildings. The reviewed applications are classified into active and passive systems. A summary of the used PCMs and their respective properties are presented as well. Primary results of the studied systems are demonstrated to be efficient in reducing indoor temperature fluctuations and energy demand during cold seasons along with the capability of triggering load reduction or shifting. Highlights  A state-of-the-art review on cooling applications of PCM in buildings  Cooling PCM applications are classified as active and passive systems  PCM serves as a promising technology for energy-efficient buildings  Combining active and passive systems can be a potential step toward NZEB