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Authors
Advisor(s)
Abstract(s)
A presente dissertação procura contribuir para a divulgação e melhor integração do conceito
de microcogeração (μCHP) nos sistemas de aquecimento central residenciais
O trabalho começa com a exposição das principais motivações e dos objetivos que se
pretendem alcançar. De seguida, são apresentados conceitos relativos ao aquecimento central
residencial e às tecnologias mais promissoras da uCHP.
A contribuição mais importante deste trabalho consiste na definição de um modelo que
permite simular o comportamento de uma unidade de μCHP quando aplicada com o objetivo
de satisfazer as necessidades térmicas típicas de uma habitação. Este modelo permite efetuar
simulações considerando que a unidade de μCHP satisfaz as necessidades de energia térmica
de forma direta (produção térmica feita no momento do consumo) ou indireta, utilizando um
depósito de armazenamento térmico (produção térmica não é necessariamente feita no
momento do consumo).
A modelização desenvolvida é aplicada a casos de estudo realistas, baseados numa unidade de
μCHP específica aplicada numa habitação localizada em Viseu e com consumos de energia
térmica bem definidos. Os resultados obtidos permitem retirar conclusões interessantes sobre
o comportamento elétrico e térmico da unidade μCHP utilizada. Adicionalmente, os
resultados permitem inferir conclusões sobre a influência que a utilização de depósitos de
armazenamento de energia térmica e a otimização do funcionamento da unidade de μCHP
podem produzir.
ABSTRACT: This dissertation aims to contribute for the dissemination and better integration of the concept of micro cogeneration (μCHP) in residential central heating systems. The work begins with the exposition of the main motivations and goals to be achieved. Afterwards, the concepts related to residential heating systems and the most promising technologies of μCHP are presented. The most important contribution of this work consists on the definition of a model devoted to the simulation of the behavior of a μCHP unit applied with the purpose of satisfying typical thermal needs of a house. The model allows performing simulations considering that the μCHP unit satisfies the needs for thermal energy directly (thermal production made at the moment of consumption) or indirectly using a thermal storage tank (heat production does not necessarily occur at the moment of consumption). The developed model was applied to real case studies based on a specific μCHP unit running on a typical residence located in Viseu, whose consumption of thermal energy is well known (defined through typical profiles). The results of the simulations allow to draw interesting conclusions about the electrical and thermal behavior of the used μCHP unit. Moreover, the results permit inferring conclusions about the influence that the use of thermal energy storage produces, as well as the optimization of the operation of the μCHP unit.
ABSTRACT: This dissertation aims to contribute for the dissemination and better integration of the concept of micro cogeneration (μCHP) in residential central heating systems. The work begins with the exposition of the main motivations and goals to be achieved. Afterwards, the concepts related to residential heating systems and the most promising technologies of μCHP are presented. The most important contribution of this work consists on the definition of a model devoted to the simulation of the behavior of a μCHP unit applied with the purpose of satisfying typical thermal needs of a house. The model allows performing simulations considering that the μCHP unit satisfies the needs for thermal energy directly (thermal production made at the moment of consumption) or indirectly using a thermal storage tank (heat production does not necessarily occur at the moment of consumption). The developed model was applied to real case studies based on a specific μCHP unit running on a typical residence located in Viseu, whose consumption of thermal energy is well known (defined through typical profiles). The results of the simulations allow to draw interesting conclusions about the electrical and thermal behavior of the used μCHP unit. Moreover, the results permit inferring conclusions about the influence that the use of thermal energy storage produces, as well as the optimization of the operation of the μCHP unit.
Description
Dissertação de Mestrado em Engenharia Eletrotécnica - Energia e Automação Industrial
Keywords
Aquecimento residencial Microcogeração Armazenamento térmico Controlo Poupança de energia
Citation
Publisher
Instituto Politécnico de Viseu. Escola Superior de Tecnologia e Gestão de Viseu