Scholarlink

<p>Polymer electrolyte membrane (PEM) fuel cells are energy conversion systems that transform the chemical energy of hydrogen fuel directly into electrical energy, with water and heat generated as by-products. These cells offer higher power densities, lower noise levels, and cleaner emissions compared to internal combustion engines (ICE<sub>S</sub>). However, effective thermal management remains a critical issue for extending the life and promoting the use of PEM fuel cells, as excess heat must be removed from the system at relatively low temperatures (60&#xa0;°C to 80&#xa0;°C). Existing coolants such as water and water–ethylene glycol mixtures are utilized, which is inadequate for efficient heat dissipation, leading to lower performance and cell lifespan. Incorporating nanofluids into the thermal management systems of PEM fuel cells presents a promising solution, potentially reducing the size of the thermal management unit. Bio-based, sustainable materials are produced (i.e., Prosopis juliflora shells [PJS] were utilized at various concentrations [0.1 vol%, 0.3 vol%, and 0.5 vol%] with a base fluid of 80:20 ethylene glycol [W:EG] that often exhibits higher thermal conductivity). And also analyses optimized coolant channels in ANSYS for uniform temperature and reduced pressure distribution in comparison with the conventional serpentine channel. Utilizing 0.5% volume with the PJS 80:20 (W:EG) stack generates a 23.2% increase in comparison with the 80:20 (W:EG) mixture stack operating temperature of 45&#xa0;°C. The multipath coolant channel (MPCC) exhibits better heat transfer (6.61%) and lower-pressure drop (22.22%) in comparison with the serpentine channel. Prosopis juliflora shell-based nanofluids have demonstrated significant improvements in terms of viscosity, specific heat, stability, thermal conductivity, and electrical conductivity when compared to conventional nanofluids. Findings show that nanofluid 0.5% PJS with 80:20 (W: EG) as a cooling medium generates higher output power effectively for the PEMFC stack, and MPCC delivers uniform heat flow.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Experimental investigation of nanoparticles from prosopis juliflora shell as a coolant and the effect of multipath coolant channel on PEMFC performance

  • 期刊论文

  • 发表日期：

    2025年10月6日

查看全文
  • Abdul Raguman,
  • Praveena Vedagiri

摘要

Polymer electrolyte membrane (PEM) fuel cells are energy conversion systems that transform the chemical energy of hydrogen fuel directly into electrical energy, with water and heat generated as by-products. These cells offer higher power densities, lower noise levels, and cleaner emissions compared to internal combustion engines (ICES). However, effective thermal management remains a critical issue for extending the life and promoting the use of PEM fuel cells, as excess heat must be removed from the system at relatively low temperatures (60 °C to 80 °C). Existing coolants such as water and water–ethylene glycol mixtures are utilized, which is inadequate for efficient heat dissipation, leading to lower performance and cell lifespan. Incorporating nanofluids into the thermal management systems of PEM fuel cells presents a promising solution, potentially reducing the size of the thermal management unit. Bio-based, sustainable materials are produced (i.e., Prosopis juliflora shells [PJS] were utilized at various concentrations [0.1 vol%, 0.3 vol%, and 0.5 vol%] with a base fluid of 80:20 ethylene glycol [W:EG] that often exhibits higher thermal conductivity). And also analyses optimized coolant channels in ANSYS for uniform temperature and reduced pressure distribution in comparison with the conventional serpentine channel. Utilizing 0.5% volume with the PJS 80:20 (W:EG) stack generates a 23.2% increase in comparison with the 80:20 (W:EG) mixture stack operating temperature of 45 °C. The multipath coolant channel (MPCC) exhibits better heat transfer (6.61%) and lower-pressure drop (22.22%) in comparison with the serpentine channel. Prosopis juliflora shell-based nanofluids have demonstrated significant improvements in terms of viscosity, specific heat, stability, thermal conductivity, and electrical conductivity when compared to conventional nanofluids. Findings show that nanofluid 0.5% PJS with 80:20 (W: EG) as a cooling medium generates higher output power effectively for the PEMFC stack, and MPCC delivers uniform heat flow.