Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Psychrometric Analysis of an Experimental Drying Testbench with Desiccant Wheel
Submission Author:
Bruno Carneiro , CE
Co-Authors:
Bruno Carneiro, Maria Eugenia V. da Silva, Francisco Nivaldo Aguiar Freire
Presenter: Bruno Carneiro
doi://10.26678/ABCM.COBEM2019.COB2019-1438
Abstract
This article presents a psychrometric study in a drying tunnel with a desiccant wheel. The experiments were carried out on an open circuit tunnel dryer with desiccant wheel contacts, the dehumidification and regeneration air flows, to increase temperature and reduce absolute humidity in the drying air flow. The desiccant rotary wheel consists of a honeycombed, bipartite structure of silica gel. It adsorbs water content from air and the heat and mass transfer are responsible for increasing drying rates when compared to conventional drying systems. The energy analysis was carried out changing air velocity and regeneration inlet temperature, as the inlet regeneration air is heated by electrical resistances. Results show a psychrometric chart with unifilar diagram demonstrating thermodynamic state points of the air inside the desiccant drying testbench. The enthalpy analysis of the diagram presents the sensible and the latent heat transfer rates with lower levels of dry bulb temperature and absolute humidity after the desiccant wheel in comparison with only the sensible resistance heating.
Keywords
Desiccant, drying, dehumidification, enthalpy, psychrometrics
