Towards zero energy solar households – A model-based simulation and optimization analysis for a humid subtropical climate

Usman, Muhammad; Ali, Muzaffar; Rashid, Tanzeel ur; Ali, Hafız Muhammad; Frey, Georg

doi:10.1016/j.seta.2021.101574

Cited by 21 publications

(9 citation statements)

References 56 publications

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“…Buildings require energy for heating and cooling so that people can live comfortably in them (Hu, He et al 2017, Li, Zhu et al 2019, Li and Chen 2019, Sergei, Shen et al 2020. Using solar energy in buildings can ultimately lead to a reduction in energy consumption (Izadi and El Haj Assad 2021, Jamil, Ali et al 2021, Usman, Ali et al 2021, Wang, Liu et al 2021. Phase change materials (PCMs) can change phase, for instance, from solid to liquid, in an almost constant temperature range.…”

Section: -Introductionmentioning

confidence: 99%

Numerical investigation of the effect of rectangular and semicircular cavities filled with phase change materials installed on the solar wall

Mustafa

Alqaed

Almehmadi

et al. 2023

Preprint

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The use of alternative energy sources, particularly solar energy, in buildings is rising and spreading around the globe. In this paper, a solar wall is analyzed using a numerical method. On the wall, a number of obstacles are placed in two shapes, rectangular (REC) and semicircular (SEC). The cavities are filled with organic phase-change materials. This study was performed in a 7-hour period in the absence of solar radiation on the wall for different dimensions of obstacles in 5 different modes. Various temperatures, including exhaust air temperature (TAR), Trombe wall temperature (TWL), and mean volume % of molten PCM in cavities, have been investigated. COMSOL software is used to carry out this numerical study. The results of this study showed that the use of SECs compared to RECs causes the TWL to be higher. In the most extreme case, at a 16 cm aspect ratio, the use of SECs gives a 2.1 ° C increase in TWL relative to the REC one. The outlet TAR is also increased by the usage of SECs. The use of larger dimensions of the cavities has increased the TAR leaving the wall so that the TAR after 7 hours of the absence of solar radiation, in the largest case of SECs, was more than 295.5 Kelvin. The use of SECs also increases the PCM freezing time. In the largest case of cavities, the use of SECs increases the freezing time by 15 minutes compared to RECs.

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Section: -Introductionmentioning

confidence: 99%

Numerical investigation of the effect of rectangular and semicircular cavities filled with phase change materials installed on the solar wall

Mustafa

Alqaed

Almehmadi

et al. 2023

Preprint

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show abstract

“…The proposed methodology was applied to a NZEB case study and a parametric analysis was carried out taking into account PV systems and energy storage systems. The importance of the on-site renewable energy supply systems and, in particular of solar technologies (including solar PV, solar space heating, solar domestic hot water generation, and solar absorption cooling) was highlighted by Usman et al [14]. The analysis showed that PV and solar thermal integration are energy-efficient solutions in a humid subtropical region.…”

Section: Introductionmentioning

confidence: 99%

A Methodology to identify appropriate refurbishment strategies towards zero energy buildings in a hot and humid climate

Austin

Carpino

Mora

et al. 2022

J. Phys.: Conf. Ser.

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Significant actions on the building stock are required to reduce energy consumption and emissions from buildings and achieve carbon neutrality by 2050. Consistently, the renovation approach of existing buildings could aim to obtain nearly Zero Energy Buildings or Net Zero Energy Buildings (NZEB). In particular, the solutions to obtain zero-energy buildings vary according to the reference climatic conditions and the technical-constructive characteristics of the buildings undergoing renovation. As part of a research project involving the Technological University of Panama (UTP) and the University of Calabria (UNICAL), this work presents a preliminary investigation aimed at identifying the most appropriate technological solutions to convert existing buildings in Panama into zero-energy buildings. In particular, the study seeks to characterize the energy demand of buildings in the research area, consisting of Panama City, and to identify a set of possible energy efficiency measures applicable in hot and humid climates through dynamic simulations. The preliminary results from the sensitivity and optimization analyses highlight the capacity of local regulations and buildings’ capacity towards achieving zero-energy buildings by enhancing the efficiency of appliances, lighting, and air conditioner system, but also by implementing passive strategies such as the bioclimatic strategies.

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“…Industrial and residential energy accounts for a significant portion of CO 2 emissions [5][6][7][8][9]. The replacement of traditional energy resources with renewable, clean energy could substantially help reduce CO 2 emissions [10][11][12][13]. Today, attention has been paid to the topic of HTR [14,15].…”

Section: Introductionmentioning

confidence: 99%

Machine Learning-Based Approach for Modeling the Nanofluid Flow in a Solar Thermal Panel in the Presence of Phase Change Materials

Alqaed

Mustafa²,

Almehmadi³

et al. 2022

Processes

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Considering the importance of environmental protection and renewable energy resources, particularly solar energy, the present study investigates the temperature control of a solar panel using a nanofluid (NFD) flow with eco-friendly nanoparticles (NPs) and a phase change material (PCM). The PCM was used under the solar panel, and the NFD flowed through pipes within the PCM. A number of straight fins (three fins) were exploited on the pipes, and the output flow temperature, heat transfer (HTR) coefficient, and melted PCM volume fraction were measured for different pipe diameters (D_Pipe) from 4 mm to 8 mm at various time points (from 0 to 100 min). Additionally, with the use of artificial intelligence and machine learning, the best conditions for obtaining the lowest panel temperature and the highest output NFD temperature at the lowest pressure drop have been determined. While the porosity approach was used to model the PCM melt front, a two-phase mixture was used to simulate NFD flow. It was discovered that the solar panel temperature and output temperature both increased considerably between t = 0 and t = 10 min before beginning to rise at varying rates, depending on the D_Pipe. The HTR coefficient increased over time, showing similar behavior to the panel temperature. The entire PCM melted within a short time for D_Pipes of 4 and 6 mm, while a large fraction of the PCM remained un-melted for a long time for a D_Pipe of 8 mm. An increase in D_Pipe, particularly from 4 to 6 mm, reduced the maximum and average panel temperatures, leading to a lower output flow temperature. Furthermore, the increased D_Pipe reduced the HTR coefficient, with the PCM remaining un-melted for a longer time under the panel.

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Towards zero energy solar households – A model-based simulation and optimization analysis for a humid subtropical climate

Cited by 21 publications

References 56 publications

Numerical investigation of the effect of rectangular and semicircular cavities filled with phase change materials installed on the solar wall

Numerical investigation of the effect of rectangular and semicircular cavities filled with phase change materials installed on the solar wall

A Methodology to identify appropriate refurbishment strategies towards zero energy buildings in a hot and humid climate

Machine Learning-Based Approach for Modeling the Nanofluid Flow in a Solar Thermal Panel in the Presence of Phase Change Materials

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