Encontro de Energia no Meio Rural
Agrener

Resumo

FERNANDES, Marcelo Côrtes, SANCHEZ, Caio Glauco e ANGULO, Mario Barriga. Custos da gaseificação de gramínea para eletrificação rural. In Anais do 3. Encontro de Energia no Meio Rural, 2000, Campinas (SP, Brasil) [online]. 2003 [citado 18 Abril 2024]. Disponível em: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022000000200021&lng=pt&nrm=iso> .

Biomass gasification is an sustainable option for energy supply, which presents low pollutants emission rate and allows - through the global cycle of growing and consumption of feedstock (vegetables), a balance between consumption and production of carbonic gas, preventing an increase of the carbonic gas levels in the atmosphere. Fluidized bed gasification is a means to increase the energetic use of biomass. A gasifier was built with internal diameter of 400mm and total height of 4600mm . The equipment was tested for gasification of elephant-grass (pennisetum purpureum) at a 100 kg/h rate. It was evaluated an adequate diesel-electric-generator to work at hybrid regime, using 70% biomass gas and 30% diesel. With the equipment's construction costs, could be made a first economic feasibility assessment on the pilot-plant to produce electricity by grass gasification (elephant-grass) at rural communities. The annual cost of the investment was estimated. The cost of electricity was calculated as a function of the capital cost and the diesel price. The methods and equations for economic assessment are presented. This study found values between 0,16 and 0,23 R$/kWh for the produced electricity, what points towards the feasibility of this project.

Palavras-chave : Biomassa; gaseificação; gaseificadores; eletrificação rural; viabilidade econômica; engenharia econômica.