Modeling of water-PCM solar thermal storage system for domestic hot water application using Artificial neural networks

Eldokaishi, A.O.; Abdelsalam, M.Y.; Kamal, M. M.; Abotaleb, H.A.

doi:10.1016/j.applthermaleng.2021.118009

Cited by 32 publications

(3 citation statements)

References 25 publications

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“…However, the hourly heat dissipation of the Kang obtained by Xing Chaojie showed that the heat dissipation of the Kang still had large volatility, the Kang's combustion heating could only last for 2 h, and the heat storage capacity of the Kang itself was not enough to maintain the stability of the indoor thermal environment [11]. At present, many studies choose to use new materials, such as PCM [26][27][28][29][30][31][32] or CaO [33][34][35][36], as thermal storage materials, but additional investment costs are required by the new materials. The large thermal mass of the earthen envelope makes it the most suitable thermal storage equipment in cave dwellings.…”

Section: Introductionmentioning

confidence: 99%

Thermal Storage Performance of Underground Cave Dwellings under Kang Intermittent Heating: A Case Study of Northern China

Zhu

Liu

et al. 2022

Processes

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The intermittent heating mode of Kang plays an important role in the heat storage and release in cave dwellings. However, research on the effect of Kang heating on the thermal process of traditional buildings is rare. Therefore, based on long-term monitoring of cave dwellings, regular conclusions about the influence of Kang heating on the thermal environment were obtained. Furthermore, an unsteady heat transfer model of the envelope was proposed for the first time. Then, based on this model, the thermal storage performance of cave dwellings during the period of Kang intermittent heating was explored. The results showed that, due to Kang heating, the indoor air temperature of cave dwellings could be increased by an average of 3.1 °C. Furthermore, the inner walls had a large thermal mass and the maximum heat storage in a single day was 487.75 kJ/m2, while the maximum heat release was 419.02 kJ/m2. The heat release at night could reach 87%. In this paper, the law of thermal storage and release characteristics of earthen building envelopes under intermittent heating was firstly obtained. Results can enrich the thermal process theory of earthen buildings and provide a theoretical basis and technical support for building thermal environmental construction.

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Section: Introductionmentioning

confidence: 99%

Thermal Storage Performance of Underground Cave Dwellings under Kang Intermittent Heating: A Case Study of Northern China

Zhu

Liu

et al. 2022

Processes

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“…The methods listed above, except the methods using fuzzy sets [73,74] and the artificial neural network methods [75][76][77], are modified solutions of the J. Stefan problem [78]. The problem involves determining the position of a variable relative to time and a coordinate system of a discrete boundary grid between a liquid and solid substance.…”

mentioning

confidence: 99%

“…Such calculations are often performed using MAT-LAB [63], Adina [59] Energy Plus [86], or Ansys fluent [88] software. A different approach is presented for using the fuzzy inference method and artificial neural networks [73][74][75][76][77]. In this case, it is enough to have a pool of empirical results from experiments to obtain a result at an acceptable error level.…”

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confidence: 99%

Modern Thermal Energy Storage Systems Dedicated to Autonomous Buildings

2023

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This paper presents a detailed analysis of the research into modern thermal energy storage systems dedicated to autonomous buildings. The paper systematises the current state of knowledge concerning thermal energy storage systems and their use of either phase change materials or sorption systems; it notes their benefits, drawbacks, application options, and potential directions for future development. The rapid proliferation of studies on installation systems, new composites, and phase change materials requires a systematisation of the subject related to short- and long-term thermal energy storage in building structures. This paper focuses on assessing the validity of the current improved thermal energy storage solutions for buildings with very high energy efficiency standards and buildings that are energy-independent. The paper presents the current results of the energy and economic analyses of the use of heat storage systems in buildings. This paper shows the optimal heat storage systems for autonomous buildings. Moreover, it also shows other potential ways to develop systems and composites capable of storing heat in autonomous buildings.

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