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37 results on '"Hussam, Wisam K."'

9. Implementing Cool Roof and Bio-PCM in Portable Cabins to Create Low-Energy Buildings Suitable for Different Climates

Author

Sedaghat, Ahmad, primary, Mahdizadeh, Arash, additional, Narayanan, Ramadas, additional, Salem, Hayder, additional, Hussam, Wisam K., additional, Al-Khiami, Mohamad Iyad, additional, Malayer, Mahdi Ashtian, additional, Soleimani, Sayed M., additional, Sabati, Mohammad, additional, Rasul, Mohammad, additional, and Kamal Khan, Mohammad Masud, additional

Published
2023
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27. Energy saving and performance analysis of air‐cooled photovoltaic panels.

Author

Hussam, Wisam K., Khlefat, Ali M., and Sheard, Gregory J.

Subjects
*PHOTOVOLTAIC power systems, *HEAT sinks, *SOLAR cells, *HIGH temperatures, *PHOTOVOLTAIC cells, *NATURAL heat convection
Abstract

Summary: The efficiency of photovoltaic (PV) cells is known to degrade with temperature, which limits their efficacy in the many regions around the world having a climate featuring high ambient temperatures. This study reports on field experiments supported by numerical modelling using Ansys steady‐state thermal solver that demonstrates improved PV cell performance when coupled with a passive natural‐convection‐driven heat sink. Heat sink fin spacing was optimized for hot climatic conditions. Experiments were conducted on a pair of PV modules, one fitted with the heat sink, the other serving as a control. Temperature data were acquired at 15 minute intervals from 6.00 am to 5.30 pm at both the front and rear of the modules. The heat sink respectively improved solar‐to‐electrical conversion efficiency and power output by 35% and almost 55%, and led to panel temperature reductions of up to 4°C and 3°C. [ABSTRACT FROM AUTHOR]

Published
2022
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37. Enhanced Heat Transfer for NePCM-Melting-Based Thermal Energy of Finned Heat Pipe.

Author

Ahmed, Sameh E., Abderrahmane, Aissa, Alotaibi, Sorour, Younis, Obai, Almasri, Radwan A., and Hussam, Wisam K.

Subjects
HEAT pipes, HEAT transfer, PHASE change materials, ENERGY storage, FINS (Engineering), FINITE element method, ENERGY density
Abstract

Using phase change materials (PCMs) in energy storage systems provides various advantages such as energy storage at a nearly constant temperature and higher energy density. In this study, we aimed to conduct a numerical simulation for augmenting a PCM's melting performance within multiple tubes, including branched fins. The suspension contained Al2O3/n-octadecane paraffin, and four cases were considered based on a number of heated fins. A numerical algorithm based on the finite element method (FEM) was applied to solve the dimensionless governing system. The average liquid fraction was computed over the considered flow area. The key parameters are the time parameter ( 100   ≤ t ≤ 600   s) and the nanoparticles' volume fraction ( 0 % ≤ φ ≤ 8 %) . The major outcomes revealed that the flow structures, the irreversibility of the system, and the melting process can be controlled by increasing/decreasing number of the heated fins. Additionally, case four, in which eight heated fins were considered, produced the largest average liquid fraction values. [ABSTRACT FROM AUTHOR]

Published
2022
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