Redução do consumo de energia fóssil na geração de vapor utilizado em restaurante industrial de empresa automotiva
Carregando...
Data
2016-09-01
Autores
Mathias, Rodrigo Escada [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
No atual contexto energético mundial, a busca pela mitigação e, sempre que possível, a substituição de combustíveis fósseis por fontes renováveis, são a pauta de diversas instituições e empresas, pois a disponibilidade de recursos não é proporcional ao crescimento do consumo. Este trabalho tem por objetivo a redução do uso de gás natural para geração de vapor nos processos de cocção de cozinha industrial. Foi realizado a caracterização do processo e dos equipamentos, identificando o fluxo de vapor ao longo de todo o processo. De modo comparativo, desenvolveu-se propostas utilizando energia renovável para redução do uso de combustível fóssil. Para suportar essa atividade foram realizadas modelagens termodinâmica do sistema atual comparando-a aos sistemas propostos, mostrando o comportamento e definindo qual proposta teria a maior colaboração na redução do consumo de combustível. Por fim, foi estudado a viabilidade financeira de cada proposta através do método do VPL e payback. O presente trabalho gerou oito propostas, entre energia solar, produção de biogás a partir de resíduos orgânicos e efluentes de estação de tratamento de esgoto, geração de energia elétrica por meio de microturbina a gás e motor de combustão interna. Conclui-se que das oito propostas, três apresentaram potencial energético capaz de substituir em 100 % a vazão mássica de gás natural demandada na cozinha industrial, além de obterem viabilidade financeira satisfatória para seguir em frente com implementação do projeto. A substituição do gás natural pelo biogás gerado a partir de efluentes da estação de tratamento foi a proposta que apresentou o melhor desempenho, a mesma foi capaz de substituir 100 % da vazão mássica de gás natural utilizado para gerar vapor aos vasos de pressão da cozinha industrial, sendo 199.741 kWh de potencial energético e um VPL positivo de R$ 2.473.966,15, com retorno dos investimentos em menos de um ano.
In the current global energy context of mitigation of non-renewable fuels and whenever it is possible, replacing fossil fuels by renewable sources are the agenda of the most of institutions and companies, because the availability of resources is not proportional to the growth of consumption. This work has as target to reduce the use of natural gas for steam generation in the cooking process of industrial kitchen. It was performed a process and equipment characterization, identifying the steam flow along the whole process. In a comparative way, it has developed proposals using renewable energy for reducing the use of fossil fuel. To support that, it was done a thermodynamic modeling of the current system compared with the proposed ones, showing the behavior and defining which proposal had the larger collaboration in terms of fuel consumption reduction. Finally, it was analyzed the financial feasibility of each alternatives by NPV and payback method. The present work has created eight proposals, such as solar energy, biogas production from organic waste and from wastewater of sewage treatment station, electric energy from gas micro turbine and internal combustion engine. Concludes that from eight proposals, three presented energetic potential able to replace in 100 % the natural gas mass flow demanded in the industrial kitchen, beyond to get satisfactory financial viability to move forwards with the project implementation. The replacement of natural gas by generated biogas from wastewater of sewage treatment station was the proposal that presented the best performance, this ones was able to replace 100 % of the natural gas mass flow used to generate steam to the pressure vessel of industrial kitchen, where 199.741 kWh of energetic potential and a NPV of R$ 2.473.966,15, with an investment return less than one year.
In the current global energy context of mitigation of non-renewable fuels and whenever it is possible, replacing fossil fuels by renewable sources are the agenda of the most of institutions and companies, because the availability of resources is not proportional to the growth of consumption. This work has as target to reduce the use of natural gas for steam generation in the cooking process of industrial kitchen. It was performed a process and equipment characterization, identifying the steam flow along the whole process. In a comparative way, it has developed proposals using renewable energy for reducing the use of fossil fuel. To support that, it was done a thermodynamic modeling of the current system compared with the proposed ones, showing the behavior and defining which proposal had the larger collaboration in terms of fuel consumption reduction. Finally, it was analyzed the financial feasibility of each alternatives by NPV and payback method. The present work has created eight proposals, such as solar energy, biogas production from organic waste and from wastewater of sewage treatment station, electric energy from gas micro turbine and internal combustion engine. Concludes that from eight proposals, three presented energetic potential able to replace in 100 % the natural gas mass flow demanded in the industrial kitchen, beyond to get satisfactory financial viability to move forwards with the project implementation. The replacement of natural gas by generated biogas from wastewater of sewage treatment station was the proposal that presented the best performance, this ones was able to replace 100 % of the natural gas mass flow used to generate steam to the pressure vessel of industrial kitchen, where 199.741 kWh of energetic potential and a NPV of R$ 2.473.966,15, with an investment return less than one year.
Descrição
Palavras-chave
Eficiência energética, Gás natural, Geração de vapor, Energia solar, Biogás, Energy efficiency, Natural gas, Steam generation, Solar energy, Biogas