Enhancing the endurance and efficiency of polymer electrolyte membrane fuel cells (PEMFCs) requires efficient thermal management. This comprehensive review examines the primary cooling techniques employed in PEMFC systems, concentrating on techniques for air and liquid cooling. Liquid cooling, which circulates a coolant through channels adjacent to the ability of the fuel cell stack to maintain ideal operating temperatures, is highlighted and significantly reduces temperature variations, thereby improving overall efficiency and lifespan. In contrast, air cooling, while simpler and more cost-effective, is less effective in high-power applications due to its reliance on ambient air for heat dissipation. The review also discusses advancements in thermal management strategies, including innovative designs for heat exchangers and the integration of thermal resistance networks, which enhance heat dissipation efficiency. Furthermore, the paper underscores the importance of developing durable materials to address catalyst and membrane degradation, and it explores the potential for integrating PEMFCs using renewable energy sources to encourage environmentally friendly transportation solutions. By identifying current challenges and proposing future research directions, this review aims to support the continuous creation of effective and reliable PEMFC technologies.
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http://dx.doi.org/10.1016/j.heliyon.2024.e38556 | DOI Listing |
J Phys Chem Lett
January 2025
College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), State Key Laboratory of Organic Electronics and Information Displays, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, P.R. China.
Heat dissipation has become a critical challenge in modern electronics, driving the need for a revolution in thermal management strategies beyond traditional packaging materials, thermal interface materials, and heat sinks. Cubic boron arsenide (c-BAs) offers a promising solution, thanks to its combination of high thermal conductivity and high ambipolar mobility, making it highly suitable for applications in both electronic devices and thermal management. However, challenges remain, particularly in the large-scale synthesis of a high-quality material and the tuning of its physical properties.
View Article and Find Full Text PDFNanomaterials (Basel)
January 2025
School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, China.
This paper investigates the thermal effects in fused-tapered passive optical fibers under near-infrared absorption. The thermal effect is primarily caused by impurities, such as OH-, which absorb incident light and generate heat. Using the finite element method, the volume changes during fiber tapering were simulated, influencing power density and thermal distribution.
View Article and Find Full Text PDFInvestig Clin Urol
January 2025
Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea.
The global increase in urolithiasis prevalence has led to a shift towards minimally invasive procedures, such as retrograde intrarenal surgery, supported by advancements in laser technologies for lithotripsy. Pulsed lasers, particularly the holmium YAG and the newer thulium fiber laser, have significantly transformed the management of upper urinary tract stones. However, the use of high-power lasers in these procedures introduces risks of heat-related injury.
View Article and Find Full Text PDFNano Lett
January 2025
Department of Biochemical Engineering, School of Chemical Engineering and Technology, State Key Laboratory of Synthetic Biology, Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), Tianjin University, Tianjin 300350, China.
Organisms that survive at freezing temperatures produce antifreeze proteins (AFPs) to manage ice nucleation and growth. Inspired by AFPs, a series of synthetic materials have been developed to mimic these proteins in order to avoid the limitations of natural AFPs. Despite their great importance in various antifreeze applications, the relationship between structure and performance of AFP mimics remains unclear, especially whether their molecular charge-specific effects on ice inhibition exist.
View Article and Find Full Text PDFCardiovasc Intervent Radiol
January 2025
Neuro Vascular Interventional Radiology Program, Department of Radiology, Memorial Sloan Kettering Cancer Center (MSK), New York, NY, 10065, USA.
In most of the cases Interventional Radiology techniques and therapies are proposed for the management of symptomatic soft tissue benign tumors responsible for pain and/or compression symptoms aiming to offer a curative intent by means of tumor necrosis with subsequent symptoms' management and improvement of life quality. The ablative therapies include chemical, thermal and non-thermal approaches while, trans-arterial (chemo)embolization also has a distinct role. Adjunct ancillary techniques should be performed whenever necessary to increase efficacy and safety and avoid or reduce complications.
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