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1,621 results on '"Wongwises, Somchai"'

262. A holistic review and state-of-the-art report of nanotechnology in solar cells

Author

Wang, Lina, Teles, Mavd P.R., Arabkoohsar, Ahmad, Yu, Haoshui, Ismail, Kamal A.R., Mahian, Omid, and Wongwises, Somchai

Subjects
Nanoenhanced-PCM, Solar power technologies, Nanoparticles, PVT setups, Nanofluid, PV modules
Abstract

New renewable energy technologies in different designs and forms are emerging every day as a result of the global awareness about the necessity of green transition and strict milestones set for 2050. Among all of the emerging technologies in this area, solar direct electricity generating systems (i.e. photovoltaic [PV], and photovoltaic-thermal [PVT] setups) are more popular not only due to the nature of solar energy, which is abundantly yet limitlessly available worldwide but also due to the recent advances in this field, making solar cells more efficient and cost-effective. The efforts in this framework are still ongoing, and from a research perspective, the use of nanotechnologies for the enhanced performance of such solar systems in various configurations and a wide variety of methods is something probably addressed more than any other approach. This article aims to present a thorough review of research activities in using nanostructures, nano-enhanced materials, nanofluids, and so on for solar direct electricity generating systems including the cells, the panel packages, and the supplementary equipment such as heat storage systems. The article provides the readers a deep understanding of the fundamentals of nanotechnology and how its knowledge has been developed over the years, how it has been integrated into the solar PV and PVT concepts, and what the state-of-the-art nature of this integrity looks like. Finally, our conclusions from the literature review process about the challenges, opportunities, risks, and benefits are presented and some proposals for future research in this area are given.

Published
2022

266. Experimental and Numerical Studies on the Effect of Lithium-Ion Batteries' Shape and Chemistry on Heat Generation.

Author

Trinuruk, Piyatida, Onnuam, Warongkorn, Senanuch, Nutthanicha, Sawatdeejui, Chinnapat, Jenyongsak, Papangkorn, and Wongwises, Somchai

Subjects
LITHIUM-ion batteries, OPEN-circuit voltage, COBALT oxides, LITHIUM, IRON, PRECIPITATION (Chemistry)
Abstract

Data sets of internal resistances and open-circuit voltage of a particular battery are needed in ANSYS Fluent program to predict the heat generation accurately. However, one set of available data, called Chen's original, does not cover all types and shapes of batteries. Therefore, this research was intended to study the effects of shapes and polarization chemistries on heat generation in Li-ion batteries. Two kinds of material chemistries (nickel manganese cobalt oxide, NMC, and lithium iron phosphate, LFP) and three forms (cylindrical, pouch, and prismatic) were studied and validated with the experiment. Internal resistance was unique to each cell battery. Differences in shapes affected the magnitude of internal resistance, affecting the amount of heat generation. Pouch and prismatic cells had lower internal resistance than cylindrical cells. This may be the result of the forming pattern, in which the anode, cathode, and separator are rolled up, making electrons difficult to move. In contrast, the pouch and prismatic cells are formed as sandwich layers, resulting in electrons moving easily and lowering the internal resistance. The shapes and chemistries did not impact the entropy change. All batteries displayed exothermic behavior during a lower SOC that gradually became endothermic behavior at around 0.4 SOC onwards. [ABSTRACT FROM AUTHOR]

Published
2023
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