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Comparison of sensible and latent thermal storage potential of double-skin façade
Published in Paul Fazio, Hua Ge, Jiwu Rao, Guylaine Desmarais, Research in Building Physics and Building Engineering, 2020
Thermal energy is generally stored as specific or latent heat. In the former case the temperature of the medium changes during the charging or discharging of the storage element, whereas in the latter case the temperature of the medium remains more or less constant since it undergoes a phase transformation. Benard et al. (1985) presented an experimental comparison of latent and specific heat within thermal walls. Traditional storage systems, such as a rock-bed, a massive wall etc., not only use exclusively the specific heat capacity but also give rise to several problems including high cost, excessive mass and undesirable temperature fluctuations. If, however, traditional building constructions are combined with phase change materials (PCMs), additional latent heat of the phase change is used to increase the thermal capacity of the material. Additionally, the phase change is usually almost isothermal providing, thus, an excellent means of temperature control.
Comparative Assessment on the Use of Energy Storage in the Building Envelopes
Published in Atul Sharma, Amritanshu Shukla, Renu Singh, Low Carbon Energy Supply Technologies and Systems, 2020
Maitiniyazi Bake, Ashish Shukla, Shuli Liu, Avlokita Agrawal, Shiva Gorijan
TES can capture thermal energy as stored energy, which can be used at a later time for heating and cooling applications and the generation of power [50,55]. In the first place, latent heat storage has a higher energy density with a smaller storage volume than the sensible heat storage [25]. The latent heat storage materials, phase change materials (PCMs), become more popular for their application in the building envelopes since they have a high-energy storage density and the capacity to store energy at a constant temperature or over a limited range of temperature variations [50].
Experimental study on thermal comfort improvement of building envelope with PCM energy storage
Published in Konstantinos Papadikis, Chee S. Chin, Isaac Galobardes, Guobin Gong, Fangyu Guo, Sustainable Buildings and Structures: Building a Sustainable Tomorrow, 2019
As a kind of energy storage material, PCMs (Phase Change Material) have significant advantages in reducing building energy consumption and improving energy efficiency. Applying this type of energy storage materials to the building energy conservation is of great significance for the establishment of a resource-saving society (Yang et al. 2015), and has broad application prospects and market demands in terms of solar energy utilization, waste heat recovery, and power load regulation (Wang & Wang 2014). According to the characteristics of the PCMs, it is obvious that the larger daily temperature range is the more favorable for heat storage and heat release of PCMs. For regions with hot summer and cold winter, it is necessary to go into the environmental conditions of using specific PCM and the energy-saving effect.
Effect on the Thermal Performance of a Bio-based Phase Change Material with the Addition of Graphite with Surfactants
Published in Heat Transfer Engineering, 2023
Yahya Sheikh, Mehmet Fatih Orhan, Mehmet Kanoglu, Muhammed Umair, Elmehaisi Mehaisi
In recent decades, special attention has been paid to electronic thermal management techniques because effective cooling systems are critical to the performance and reliability of many electronic components. Phase change materials, commonly referred to as PCMs, are materials that have the distinct ability to absorb or release significant quantities of thermal energy at a relatively constant temperature. This is made possible by the large enthalpy of vaporization or heat of fusion values associated with phase change processes. As a result, PCMs are an appropriate material candidate when considering cooling systems. This is especially true during the transient response phase of an electronic system since using a PCM can ensure a constant temperature while simultaneously absorbing thermal energy from the system.
Mock-up test on the application of phase change materials in underfloor radiant heating system in apartments
Published in Journal of Asian Architecture and Building Engineering, 2023
Seong Eun Kim, Yong Woo Song, Jin Chul Park
Thermal energy storage materials, such as phase change materials (PCMs), can be used to increase the heat storage capacity. PCMs can store energy and maintain a specified temperature (Fleischer 2015; Sarı 2004). PCMs can store 5 to 14 times more heat per unit volume than water, bricks, or rocks (Sharma et al. 2009). Several studies have been conducted on the architectural application of this material. It can be applied to a structure by mixing microencapsulated PCM with gypsum to create plaster wallboards (Lachheb et al. 2017) or by directly using PCM mixed with mortar (Cunha, Aguiar, and Tadeu 2016). PCM can also be inserted into the holes in bricks (Vicente and Silva 2014) for thermal applications. Additionally, it is possible to add PCM layers to walls (Panayiotou, Kalogirou, and Tassou 2016) and roofs (Pasupathy et al. 2008) or attach PCM tiles (Chung and Park 2016) to roofs. Particularly, the use of PCM in a building structure is effective in controlling time lag and peak temperature. It has also been reported that ventilation efficiency and energy performance are improved when PCM is used in heat exchangers (Promoppatum et al. 2017) or thermal storage systems (Gholamibozanjani and Farid 2020) in ventilation systems. Recently, machine learning technology is used to improve performance by combining with PCM-based building cooling and ventilation systems(Zhou et al. 2020a; Zhou et al. 2020b; Zhou and Liu 2023)
Heat transfer study on cylindrical and square thermal energy storage unit
Published in International Journal of Ambient Energy, 2022
J. Thamilarasan, N. Dilip Raja, K. Logesh
The storage of energy in phase change materials (PCMs) is a method of utilising latent heat energy storage, the stored thermal energy is released accompanied by changes in the material phase. The solid–liquid transition is widely adopted as the liquid–gas transition is unfeasible and solid–solid transitions have negligibly low-energy density (Devarajan, Munuswamy, and Mahalingam 2018). Upon heating a PCM, it will act like sensible heat energy storage initially and the material temperature increases. But, after the transition temperature is attained, the material continues to absorb heat at a constant temperature, although its state is changed (Radhakrishnan et al. 2018a). This heat absorbed at a constant temperature is known as the latent heat of the transition. In order to get back the energy, the PCM can be converted from the liquid to the solid phase and thus the energy stored as latent heat is liberated (Balaji et al. 2018; Jadhav et al. 2018; Logesh et al. 2018; Rupesh et al. 2018; Santhana Krishnan et al. 2018; Arulprakasajothi et al. 2018a).