Banca de DEFESA: ANDRÉ ALMEIDA DIAS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ANDRÉ ALMEIDA DIAS
DATA : 28/06/2019
HORA: 14:00
LOCAL: Anfiteatro do Departamento de Engenharia Mecânica (Sala 100)
TÍTULO:

Experimental Analysis of Corn Drying in Lab Scale Fixed Bed Grain Dryer

PALAVRAS-CHAVES:

Corn. Deep-bed Dryer. Drying kinetics. Energy Analysis. Exergy Analysis. Experimental Analysis.

PÁGINAS: 239
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Mecânica
SUBÁREA: Engenharia Térmica
ESPECIALIDADE: Aproveitamento da Energia
RESUMO:

The thermal drying process is most commonly used to remove moisture from agricultural products and generates improvements in harvesting, storage and product quality. However, drying has a high energy consumption, representing 50% of the total energy consumption involved in the processing of corn, which is the most produced grain in the world. In this way, progress in studies on this process is essential to make more efficient use of global energy resources. This work, therefore, aims to construct an experimental fixed bed dryer with speed and temperature control of the drying air to perform studies of the drying dynamics of corn in a deep bed layer and to analyze the energetic and exergetic efficiencies of the equipment developed. The dryer design was detailed and followed the recommendations observed in the literature. The dryer design was detailed and followed the recommendations observed in the literature. The deep bed corn drying experiments lasted 120 minutes and were performed in a cylindrical bed of 130mm in diameter and 200mm in height, using temperatures of 40, 50 and 60°C, and the velocities of 0,8 and 1,3ms-1 for the incoming drying air. The corn used was harvested in the fields of EMBRAPA in Sete Lagoas and stored in a refrigerated environment. Among the different parameters of drying air temperature and velocity, only the temperature causes a significant difference in the removal of the average moisture content of the grain bed, so the higher the temperature is, more moisture was removed of the grains. The drying air temperature is directly proportional to the drying rate and the exergetic drying efficiency and is inversely proportional to the drying energy efficiency. While the drying air velocity in the tested range, doesn't change the average drying rate, and it is inversely proportional to both of efficiencies. The experiment that presented the highest real energy efficiency of drying was the with a temperature of 50°C and an input velocity of 0,8ms-1, whose actual average energy efficiency was 8%. While the highest exergic efficiency obtained was 15% and occurred in experiment with an inlet temperature of 60°C and a velocity of 0,8ms-1.

MEMBROS DA BANCA:
Interno - ANDRE GUIMARAES FERREIRA
Presidente - JOSE LEONCIO FONSECA DE SOUZA
Interno - PAULO EDUARDO LOPES BARBIERI
Externo à Instituição - RAFAEL PINHEIRO AMANTÉA - IETEC
Externo à Instituição - RAPHAEL NUNES DE OLIVEIRA - UFMG