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Thermal and environmental simulation of buildings
Ramos, João António Esteves; Pitarma, Rui A.; Carvalho, Maria da GraçaThe purpose of most buildings is to provide a comfortable and healthy indoor environment for the occupants. As a result of increasing energy prices in the last decades, much effort has been done to reduce the cost arising from mechanical and natural ventilation of buildings. This often involves lowering the outdoor air intake. At the same time, many new pollution sources have been introduced in the buildings. T...
Three-dimensional natural convection in rooms connected to the outside through ...
Ramos, João António Esteves; Martinho, N. A. G.; Pitarma, Rui A.; Carvalho, Maria da GraçaThe growing interest in the study of natural convection in geometrically complex enclosures with restricted communication has been stimulated by applications involving energy-efficient passive-solar buildings, natural convection cooling of electronic equipment and room heating and ventilation. Airflow through doorways, windows and other large openings are significant ways in which air, pollutants and thermal en...
O papel da modelação matemática na optimização da climatização de edifícios
Ramos, João António Esteves; Pitarma, Rui A.; Martinho, Nuno A.; Carvalho, Maria da GraçaComunicação apresentada nas Primeiras Jornadas Politécnicas de Engenharia Mecânica, Automóvel, Gestão Industrial e Ambiente, Leiria, 2001. ; A crescente necessidade da utilização de meios de cálculo que permitam a previsão e a visualização das características dos escoamentos do ar, da distribuição da temperatura, da distribuição da humidade do ar e do transporte de contaminantes, em espaços de edifícios ventil...
Modelação do conforto térmico em salas climatizadas
Ramos, João António Esteves; Pitarma, Rui A.; Carvalho, Maria da GraçaComunicação apresentada nas Primeiras Jornadas Nacionais do Colégio de Engenharia Mecânica, Porto, 1998. ; The goal of this lecture is to introduce a new tool to predict the three-dimensional turbulent air flow pattern and the heat transfer in ventilated buildings
The role of computational fluid dynamics in the building energy and environment...
Carvalho, Maria da Graça; Ramos, João António EstevesThe goal of this paper is to introduce a Computational Fluid Dynamics model to study the steady three-dimensional turbulent airflow pattern, with thermal buoyant effects, the heat transfer, the gas contaminant transport and the moist air transport into mechanical or natural ventilated spaces, with furniture and people. The calculations made use of a numerical procedure with solves the three-dimensional steady s...
Dynamic analysis of a refrigerated room
Carvalho, Maria da Graça; Pitarma, Rui A.; Pereira, Filipe D.; Ramos, João António EstevesComunicação apresentada no European Congress on Economics and Management of Energy in Industry, Estoril, 1994 ; The prediction of velocity and temperature distributions in a refrigerated room generally requires the simultaneous three-dimensional solution of the equations governing the flow pattern (Navier-stokes equations for buoyant flows) and the energy equation. This paper presents numerical predictions and...
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