Heat Transfer Theoretical Analysis in CSTR Equipped with Jacket Henrique Weiss de Albuquerque Maranhão, Dorotéa Villanova Garcia, Deovaldo de Moraes Júnior, Vitor da Silva Rosa

Abstract

The process of heat exchange between two fluids that are at different temperatures and separated by a solid wall occurs in many engineering applications. The equipment used to implement this exchange is called heat exchangers, and specific applications can be found in heating, cooling, environmental conditioning, heat recovery and chemical processes. The most common applications of this type of equipment include: Heaters, chillers, condensers, evaporators, cooling towers and boilers. Typically, jacketed tank reactors or half-rod coils are used, which also requires a heat exchange operation, either to heat or cool the stored fluid. The usual modeling of exothermic reactors is based on the classic model of the two-state Continuous Stirred Tank Reactor (CSTR). In this model, the assumption that the temperature dynamics of the heat exchange jacket is negligible is valid, so that its response is possibly instantaneous. This paper extended the classic two-state CSTR model to a three-state model, which considers the dynamics of the heat exchange jacket. Based on the above premise, this paper aims to review the criteria with a heat exchanger surface by helical baffle jacket (Figure 1), only on the tank side and for having several design equations available in the literature. The calculations were based on equations and concepts understood in the literature in order to analyze more accurate methods. The results presented through tests and compared with the equations show that the jacket design has a considerable influence on the system and is very close to the theoretical, making the study supported.