El grupo de Mecánica Computacional los invita a su nuevo seminario sobre: Application of CFD tools in the analysis of heat transfer processes in the panela’s industry in Colombia.
Conferencista: Pablo Cortes, Msc. Universidad de los Andes.
Fecha: Jueves 08 de Marzo (Entrada libre – Cupo limitado)
Hora: 11:00 a 12:30PM
“Panela” is the name given to dehydrated sugar cane juice in Colombia; this product is worldwide known with different names such as jaggery, piloncillo, raspadura, papelón, chancaca, among others. Colombia is the second world producer of panela with the largest per capita consumption. Its raw material, sugarcane, has the second largest cultivated area in this country. Panela or brown sugar cane is produced in a sugarcane mill, where the sugarcane is crushed to extract its juice. In Colombia there are approximately 20,000 sugar cane mills and there exists a necessity to use newer technologies in the design and analysis of the several sub-processes involved in the panela industry given its importance in Colombian economy.
The objective of this presentation is to show and discuss a computational simulation of the fluid dynamics and heat transfer phenomena involved in the heated and concentration of the sugarcane juices. These heat transfer processes involve a complex geometry boiler called “Pailas”. Pailas allow the heat exchange between the exhaust gases leaving the combustion chamber and the sugarcane juices. A correct concentration of glucose is highly necessary in order to obtain a satisfactory final product. With these models, the influence of both mechanisms of heat transfer (convection and radiation) as well as other parameters like geometric configuration, composition of heating gases and flux regimes were studied. In order to provide a tool for designers, some correlations for Nusselt’s number were developed and proposed. Some assumptions were made in order to reduce the computer’s capacity required, like surface at constant temperature, properties of gases modelled by polynomials and negligible radiation at low temperatures. The mechanism of boiling in the liquid that is being heated was not studied. With this model, it was possible to get interesting conclusions about the best way to design these devices.
The great potential of using CFD in an industry such as Panela manufacturing in Colombia is demonstrated in this presentation. Computational tools such as CFD allow improving the design and operative characteristics of the different energy conversion equipment involve in the panela’s manufacturing industry.