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Abstract(s)
O consumo energético dos edifícios residenciais e comerciais, segundo a DGEG, em 2011 atingiu cerca de 28% do consumo total de energia final em Portugal, contribuindo assim fortemente para o aumento dos gases de estufa na atmosfera. De modo a minimizar o consumo energético e diminuir a pegada ecológica desses edifícios, há necessidade de se utilizarem novas soluções nos sistemas consumidores de energia aí instalados, nomeadamente os sistemas de climatização.
O presente documento descreve as atividades desenvolvidas durante o estágio curricular na empresa ACet, ANTERO CARDOSO – Engenharia Termodinâmica, Lda. A ACet tem como atividade principal a elaboração e consultoria de projetos de engenharia para instalações técnicas especiais.
Dos diversos trabalhos desenvolvidos na empresa destacou-se o projeto de reabilitação de um edifício residencial, que consiste na climatização dos espaços e na produção de águas quentes sanitárias. No âmbito do projeto foi efetuada uma análise do consumo energético anual comparativo entre três sistemas alternativos de climatização, incluindo ainda um sistema solar térmico para produção de água quente sanitária.
A seleção do sistema de climatização com melhor eficiência foi realizada por meio de simulações energéticas comparativas. O estudo energético teve em conta medidas passivas para a melhoria do desempenho energético do edifício, com base nas características da habitação e a viabilidade da sua aplicação. Adicionalmente foi efetuada uma análise económica dos sistemas de climatização em estudo, permitindo designar qual destes seria o mais rentável a longo prazo.
Da análise energética realizada para os três sistemas de climatização, conclui-se que o sistema VRF com recuperação de calor é o sistema que consome menos energia elétrica, cerca de 27 % relativamente ao sistema Chiller/ Bomba de calor reversível que apresenta maior consumo de energia elétrica. O sistema Chiller/Bomba de Calor reversível com recuperação de calor consome menos de 17% de energia elétrica relativamente ao sistema Chiller/ Bomba de Calor reversível.
The energy consumption of residential and commercial buildings, according to DGEG, in 2011 reaching about 28% of total final energy consumption in Portugal, thus contributing strongly to the increase of greenhouse gases in the atmosphere. In order to minimize the electric energy consumption and reduce the ecological footprint of buildings, there is need to use new solutions for air conditioning systems. This document describes the activities developed during the curricular internship at ACet, ANTERO CARDOSO - Engenharia Termodinâmica, Lda. ACet's main activity is the elaboration and engineering consultancie for engineering projects for special technical installations. Of the several works developed in the company, the project for the rehabilitation of a residential building, which consists in the air conditioning of the spaces and the production of hot sanitary waters, stood out. Within the scope of the project, it was intended to analyse the comparative annual energy consumption between three air conditioning alternative systems, including a solar thermal system for the production of domestic hot water. The selection of the air conditioning system with better efficiency was carried out through comparative energy simulations. The energy study considered passive measures to improve the energy performance of the building, taking into account the physical characteristics of the building and its application feasibility. In addition, an economic analysis of the air conditioning systems under study was carried out, allowing to designate which of these would have the lowest pay-back period. Based on the energy analysis performed for the three air conditioning systems, it was concluded that the VRF system with heat recovery is the system that consumes less electric energy, about 27% less compared to the Chiller / Reversible heat pump system, which presents the highest energy consumption. The Reversible Heat Pump / Heat Recovery system consumes less 17% of electrical power compared to the Chiller / Reversible Heat Pump system.
The energy consumption of residential and commercial buildings, according to DGEG, in 2011 reaching about 28% of total final energy consumption in Portugal, thus contributing strongly to the increase of greenhouse gases in the atmosphere. In order to minimize the electric energy consumption and reduce the ecological footprint of buildings, there is need to use new solutions for air conditioning systems. This document describes the activities developed during the curricular internship at ACet, ANTERO CARDOSO - Engenharia Termodinâmica, Lda. ACet's main activity is the elaboration and engineering consultancie for engineering projects for special technical installations. Of the several works developed in the company, the project for the rehabilitation of a residential building, which consists in the air conditioning of the spaces and the production of hot sanitary waters, stood out. Within the scope of the project, it was intended to analyse the comparative annual energy consumption between three air conditioning alternative systems, including a solar thermal system for the production of domestic hot water. The selection of the air conditioning system with better efficiency was carried out through comparative energy simulations. The energy study considered passive measures to improve the energy performance of the building, taking into account the physical characteristics of the building and its application feasibility. In addition, an economic analysis of the air conditioning systems under study was carried out, allowing to designate which of these would have the lowest pay-back period. Based on the energy analysis performed for the three air conditioning systems, it was concluded that the VRF system with heat recovery is the system that consumes less electric energy, about 27% less compared to the Chiller / Reversible heat pump system, which presents the highest energy consumption. The Reversible Heat Pump / Heat Recovery system consumes less 17% of electrical power compared to the Chiller / Reversible Heat Pump system.
Description
Trabalho final de mestrado para obtenção de grau de Mestre em Engenharia Mecânica
Keywords
AVAC HVAC Eficiência energética Energy efficiency Reabilitação Rehabilitation Simulação energética Energy simulation
Citation
CUNHA, Magalie Catarino da - Desenvolvimento de caso de estudo na componente de climatização num gabinete de engenharia. Lisboa: Instituto Superior de Engenharia de Lisboa, 2018. Dissertação de mestrado.
Publisher
Instituto Superior de Engenharia de Lisboa