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69 - TENDÊNCIAS TECNOLÓGICAS NO EMPREGO DE NANOFLUIDOS EM PERMUTADORES DE CALOR DE PLACAS: AVANÇOS, LIMITAÇÕES E PERSPECTIVAS

Doi: 10.47094/ICOLUBRAPECI.2026/RS-51

PALAVRAS CHAVE: Trocadores de calor. Sistemas térmicos compactos. Tecnologias emergentes.

KEYWORDS: Heat exchangers. Compact thermal systems. Emerging technologies.

ABSTRACT:
Introduction: Cooling in plate heat exchangers has been extensively studied due to the growing demand for thermal systems that are more compact, efficient, and energetically sustainable. Over the past five years, significant advances have been observed in the use of nanofluids as an alternative for heat transfer enhancement, driven by progress in nanoparticle synthesis, improved colloidal stability, and the development of hybrid formulations. Objective: This study aims to critically review recent literature on the use of nanofluids for cooling in plate heat exchangers, highlighting technological trends, thermal performance gains, and associated operational challenges. Methodology: The literature review was conducted through systematic searches in the Web of Science (WoS), Scopus, and ScienceDirect databases, selecting articles published between 2019 and 2024 that address the thermo-hydraulic behavior of nanofluids in plate heat exchangers—either experimentally or numerically. Inclusion criteria covered studies analyzing thermophysical properties, stability, concentration effects, plate geometry, Reynolds number, and hydraulic penalties. A comparative analysis of the selected works identified performance patterns and technological advances, such as the use of hybrid nanoparticles, ultrasonic stabilization techniques, next-generation surfactant additives, and high-resolution CFD modeling. Results: Specialized literature in the field demonstrates that nanofluids can increase heat transfer rates by 10% to 35%, depending on the nanoparticle type, concentration, and flow regime. Recent studies highlight additional gains achieved with hybrid nanofluids (such as Al2O3–CuO and graphene–silver), which combine high thermal conductivity with enhanced stability. However, increased viscosity remains a primary limitation, leading to higher pressure drops and increased pumping power consumption. Conclusions: It is concluded that nanofluids represent a promising, emerging technology for thermal intensification in plate heat exchangers, particularly in light of recent advances in stability, nanoparticle synthesis, and computational modeling. Despite hydraulic challenges and the need for experimental standardization, the results indicate significant potential for application in industrial, automotive, and high-efficiency refrigeration systems.

Autores

  • Cleiton Rubens Formiga Barbosa

  • Cleiton Rubens Formiga Barbosa Júnior

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