Design and testing of vertical tubular baffle heat exchanger as an internal reboiler in the distillation device

Abstract

Reboiler in the distillation device is a heat exchanger to heat or boil liquid material in the distillation column. In this research vertical tubular baffle heat exchanger was designed and used as an internal reboiler in the distillation device. The aim of the study was to observe the temperature distribution during the liquid heating process in the vertical tubular baffle heat exchanger with different dimensions. The study was conducted by designing heat exchangers (HE) with different dimensions in height, diameter, and surface area (number) of tubes. Times and fuels needed to heat the liquid to a temperature of 78 °C were calculated. Based on observations it was found that the different geometry of the vertical tubular baffle heat exchanger gives different performance. Height, diameter, and the number of tubes (surface area) affect the value of the overall heat transfer coefficient, times and fuels needed for heating liquids at a temperature of 78 °C. In the same surface area but different in height and diameter of the heat exchanger, give a different result in overall heat transfer coefficient (U). HE with the number of tubes 3 and 7 obtained a higher value of U with a tube height of 4 cm and a diameter of 4 cm, compared with the value of U in HE with a tube 8 cm in high and 2 cm in diameter, but the opposite occurs in HE with a number of tubes 5.

Optimum Design Parameters with the Lowest Cost of Basra Refinery Kettle Reboiler

“…Model validation: Validation is the procedure of verifying whether the simulating and the modeling and their related results are matching the results of the mathematical model, This comparison between the simulation and mathematical model is very important to verify these results. Table(3) shows a comparison between the Aspen Plus results obtained from the simulation and the mathematical model (design equation) we notice a great convergence between the results in the two cases, and this indicates that the simulation results are valid and reliable in design calculations, with an acceptable error margin of 7.1% for the overall heat…”

“…It is important to improve and optimize the design, chemical, and physical properties used in the simulation program's approach can be calculated using statistical models. Heat exchangers with the same surface area but a different height and diameter produce a different average heat transfer coefficient [3]. a model for simulating the fluid dynamics and pillow plate thermal performance thermosiphon of reboilers' correlations for the single-phase heat transfer coefficient were used, the heat transfer coefficient with nucleate boiling was calculated [4].…”

Heat Transfer Characteristics in Vertical Tubular Baffle Internal Reboiler through Dimensional Analysis

“…The types of heat exchangers used as internal reboilers include stub in U-tube bundle reboiler (Voigt & Nj, 2013), calandria (Bhanvase et al, 2007), and vertical helical coil (Ghorbani et al, 2010). A design and test of another type of heat exchanger with different shapes and directions of fluid flow were developed by (Susmiati et al, 2019) named vertical tubular baffle. This study showed that the geometry (diameter, height, and the number of tubes) in this type of heat exchanger affects the heat transfer coefficient.…”