Numerical Investigation of Phase Change Materials for Insulation of Residential Buildings in Hot Regions in Iraqi cities

Basher, Hadi O.; Hasan, Mushtaq I.; Shdhan, Ahmed O.

doi:10.31185/ejuow.vol6.iss2.87

Cited by 2 publications

(1 citation statement)

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“…The results showed that the best heat dissipation performance and a significant 12% reduction in oil temperature compared to the conventional transformer were obtained when using the transformer with a perforated trapezoidal fin, hexagonal shape. Basher and Kadhem [28] analyzed fin shapes (trapezoidal, wavy, and triangular) using Ansys Fluent 22 R1 software to examine their effect on the cooling efficiency of electrical distribution transformers. They found that the highest effectiveness in reducing the surface and core temperatures of the transformer was at the trapezoidal fin shape.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Electrical Power Transformer Fins Design Technology: Numerical Analysis and Experimental Validation

Ali Shokor Golam

2024

ARFMTS

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The study includes numerical analysis and experimental verification on an electrical power distribution transformer (250 kVA, 11 kW, Oil Natural Air Natural). ANSYS Fluent R3 2019 software was used to develop the numerical simulation model. The validity of the numerical model was confirmed by comparing the results of the numerical model and experimental data. The study aims to improve the efficiency and performance of electrical power distribution transformers by proposing a design that reduces the temperature of the transformer while maintaining its traditional size. Numerically, the effect of fin geometry on the temperature and density of transformer oil was studied. Four different fin designs were proposed and compared with the traditional design. According to the results, all proposed designs contributed to improving the cooling performance of the transformer compared to the traditional design. Design A is similar to the traditional transformer design, with the only modification being manipulation of the fin length, and achieves an average oil temperature reduction of 4 K. Design B showed the smallest temperature drop of the four designs, with a 3 K drop. Designs C and D include ventilation channels that match the shape of the fin, providing distinct design differences. The difference between both designs relied on the fact that for design C, the orthogonally of fin plates was retained. On the other hand, in design D, skewing of fin plates was introduced. Design D proved to be the most effective in reducing the average oil temperature, being reduced by 10 K. On the other hand, Design C reduced the average oil temperature by 7 K.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Electrical Power Transformer Fins Design Technology: Numerical Analysis and Experimental Validation

Ali Shokor Golam

2024

ARFMTS

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Recent Advances and Developments in Phase Change Materials in High-Temperature Building Envelopes: A Review of Solutions and Challenges

Rashid,

Dulaimi,

Hatem

et al. 2024

Buildings

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The use of phase change materials (PCMs) has become an increasingly common way to reduce a building’s energy usage when added to the building envelope. This developing technology has demonstrated improvements in thermal comfort and energy efficiency, making it a viable building energy solution. The current study intends to provide a comprehensive review of the published studies on the utilization of PCMs in various constructions of energy-efficient roofs, walls, and ceilings. The research question holds massive potential to unlock pioneering solutions for maximizing the usefulness of PCMs in reducing cooling demands, especially in challenging high-temperature environments. Several issues with PCMs have been revealed, the most significant of which is their reduced effectiveness during the day due to high summer temperatures, preventing them from crystallizing at night. However, this review investigates how PCMs can delay the peak temperature time, reducing the number of hours during which the indoor temperature exceeds the thermal comfort range. Additionally, the utilization of PCMs can improve the building’s energy efficiency by mitigating the need for cooling systems during peak hours. Thus, selecting the right PCM for high temperatures is both critical and challenging. Insulation density, specific heat, and thermal conductivity all play a role in heat transfer under extreme conditions. This study introduces several quantification techniques and paves the way for future advancements to accommodate practical and technical solutions related to PCM usage in building materials.

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Numerical Investigation of Phase Change Materials for Insulation of Residential Buildings in Hot Regions in Iraqi cities

Cited by 2 publications

References 1 publication

Evaluation of the Electrical Power Transformer Fins Design Technology: Numerical Analysis and Experimental Validation

Evaluation of the Electrical Power Transformer Fins Design Technology: Numerical Analysis and Experimental Validation

Recent Advances and Developments in Phase Change Materials in High-Temperature Building Envelopes: A Review of Solutions and Challenges

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