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Atualmente, na procura da otimização da utilização de energia por parte de empresas industriais, é frequente recorrer-se ao conceito de integração energética de forma a garantir o maior aproveitamento e eficiência possível dos consumos e gastos energéticos, resultando numa diminuição dos custos associados a esta vertente. Procurando corresponder a esta otimização, o método Pinch, no qual se procura associar os consumidores e os produtores de energia térmica de forma a ser necessário a menor quantidade de energia externa possível, pode ser aplicado a um conjunto de equipamentos já existentes, de forma a que seja possível utilizar a energia excedente dos produtores de energia nos equipamentos que a necessitem. Para a aplicação deste método ao Centro de Produção de Leça do Balio da Super Bock Group, fez-se um levantamento da rede de permutadores de calor já existente e dos outros equipamentos que a compõem, bem como das características termodinâmicas das correntes que são utilizadas. Com estas informações construiu-se uma nova rede de permutadores de calor, otimizada de acordo com o método Pinch. Comparando a rede existente e a rede proposta nesta dissertação, verificou-se que estas apresentam a mesma quantidade de energia recuperada anualmente, porém o número de permutadores necessários na rede proposta é menor, reduzindo-se de 16 para 8. Esta redução apesar de não impactar diretamente no consumo de energia da unidade industrial pode refletir resultados positivos a longo prazo sobre a forma de menores custos de manutenção dos permutadores.
These days, while looking for the optimization of energy consumption by any industry, it is frequent to resort to the concept of energetic integration, as to ensure the most possible efficiency in the consumption of energetic resources, resulting in a reduction of the associated monetary costs. In order to achieve this optimization, the Pinch method, in which you match energy producers and consumers’ necessities to reduce the amount of external energy needed, can the used and applied to a set of pre-existing equipment so you can divert the exceeding energy to the equipment that need it. A survey of the already existing thermal recovery network was made in which both the equipment that make it up and the thermodynamical characteristics of its currents were detailed, which allowed for a new network to be made according to the Pinch method. Comparing both these networks, it was possible to conclude that while the annual amount of recovered energy is the same, the amount of heat exchangers needed to make up the network was reduced from 16 to 8, which while not impacting directly the consumption of energetic resources can have long term positive repercussions in the form of lesser associated maintenance costs.
These days, while looking for the optimization of energy consumption by any industry, it is frequent to resort to the concept of energetic integration, as to ensure the most possible efficiency in the consumption of energetic resources, resulting in a reduction of the associated monetary costs. In order to achieve this optimization, the Pinch method, in which you match energy producers and consumers’ necessities to reduce the amount of external energy needed, can the used and applied to a set of pre-existing equipment so you can divert the exceeding energy to the equipment that need it. A survey of the already existing thermal recovery network was made in which both the equipment that make it up and the thermodynamical characteristics of its currents were detailed, which allowed for a new network to be made according to the Pinch method. Comparing both these networks, it was possible to conclude that while the annual amount of recovered energy is the same, the amount of heat exchangers needed to make up the network was reduced from 16 to 8, which while not impacting directly the consumption of energetic resources can have long term positive repercussions in the form of lesser associated maintenance costs.
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Keywords
Integração energética Pinch Permutadores de Calor Aproveitamentos térmicos Process Integration Heat Exchangers Thermal Recovery