Especificação de uma bancada de secagem com ligação à rede elétrica por sistema fotovoltaico

Abstract

The animal and vegetal origin products need adequate storage for their transport and selling. The drying of these kind of products facilitates the storage and postpone the expiration date for consumption. The drying process demands time and energy. This paper has as purpose the specification of a theoretical drying apparatus to be powered by solar photovoltaic modules connected to the energy grid. In systems with photovoltaic energy generation there are two types of operation, one is an independent system sustainable by a battery bank for an established period of time, and the other is a system connected to the energy grid in case it demands energy during a period in which there is no solar radiation. The independent systems are more complex than the energy grid connected ones because they have more electrical equipment and, for this reason, the cost of the system becomes higher. The results show a selection of the measuring sensors (dry bulb and wet bulb temperature and mass flow and airflow velocity), a specification of apparatus (fan, electrical resistances) as well as the sizing calculation and specification of the photovoltaic system for the electric drive of the apparatus. This system is recommended, despite the high cost