Análise numérica de trocador de calor do tipo tubo duplo utilizando nanofluído a base de grafeno

Abstract

Heat exchangers are devices that allow heat exchange between two or more fluids that are separated by some solid interface and that are at different temperatures. Present in many industries, this device makes this energy exchange happen indirectly, through elements that separate the fluids, or directly, in a mixing process. The arrangements for the flow of these fluids can be in parallel flow, or in counter flow. Heat transfer fluids play a vital role in many industries and processes, including power generation, chemical processes, heating and cooling processes, transportation, microelectronics and many other areas. Among the main fluids we find water, mineral oils and ethylene glycol. However, common heat transfer fluids have a low energy yield when compared to solid materials, so, to meet the needs of the work, a new heat exchange fluid was produced, the nanofluid, which is nothing more than a common fluid, with solid nanoparticles dissolved in its composition. Solid particles that supply the energetic deficiency of the common fluid. Taking into account its importance for the industry as a whole, through a computational numerical study (CFD), the present work aims to investigate the effectiveness of the use of graphene-based nanofluid, which nanofluid parameter interferes and helps in the increase of heat exchange efficiency performance in double tube heat exchangers.