15 documents found, page 1 of 2
Application of indoor greenhouses in the production of thermal energy in circul...
Conceição, Eusébio; Gomes, João; Conceição, Maria Inês; Conceição, Margarida; Lúcio, Maria Manuela Jacinto do Rosário; Awbi, HazimThe production of thermal energy in buildings using internal greenhouses makes it possible to obtain substantial gains in energy consumption and, at the same time, contribute to improving occupants' thermal comfort (TC) levels. This article proposes a study on the producing and transporting of renewable thermal energy in a circular auditorium equipped with an enveloping semi-circular greenhouse. The numerical s...
Modelling of indoor air quality and thermal comfort in passive buildings subjec...
Conceição, Eusébio; Gomes, João; Conceição, Maria Inês; Conceição, Margarida; Lúcio, Maria Manuela Jacinto do Rosário; Awbi, HazimAir renewal rate is an important parameter for both indoor air quality and thermal comfort. However, to improve indoor thermal comfort, the air renewal rate to be used, in general, will depend on the outdoor air temperature values. This article presents the modelling of indoor air quality and thermal comfort for occupants of a passive building subject to a climate with warm conditions. The ventilation and shadi...
Predicting the air quality, thermal comfort and draught risk for a virtual clas...
Conceição, Eusébio; Santiago, Cristina I. M.; Lúcio, Maria Manuela Jacinto do Rosário; Awbi, Hazim B.This paper concerns the prediction of indoor air quality (IAQ), thermal comfort (TC) and draught risk (DR) for a virtual classroom with desk-type personalized ventilation system (PVS). This numerical study considers a coupling of the computational fluid dynamics (CFD), human thermal comfort (HTC) and building thermal behavior (BTB) numerical models. The following indexes are used: the predicted percentage of di...
Numerical simulation of the application of solar radiant systems, internal airf...
Conceição, E. Z. E.; Lúcio, Maria Manuela Jacinto do RosárioIn this work, the use of numerical simulation in the application of solar radiant systems, internal airflow and occupants' presence in the improvement of comfort in winter conditions is made. The thermal comfort, the local thermal discomfort and the air quality in an occupied chamber space are evaluated. In the experimental measurements, a wood chamber, a desk, two seats, two seated hygro-thermal manikins, a wa...
Application of computational fluid dynamics differential model coupled with hum...
Conceição, E. Z. E.; Geraldo, D. R. B.; Lúcio, Maria Manuela Jacinto do RosárioIn this study the coupling of computational fluid dynamics (CFD) differential and human thermal comfort (HTC) integral numerical models is developed and used. The HTC integral numerical model evaluates the thermal comfort in non-uniform environments, while the CFD differential numerical model evaluates the airflow inside the virtual chamber and around the manikins. The numerical simulation, using upper crossed ...
Evaluation of indoor air quality in classrooms equipped with cross-flow ventila...
Conceição, E. Z. E.; Farinho, J. P.; Lúcio, Maria Manuela Jacinto do RosárioIn this work the evaluation of indoor air quality in a classroom equipped with cross-flow ventilation is presented. A numerical methodology, based on comparison with experimental data, used in the evaluation of the air exchange rate, airflow rate and the age of the air, was applied in the first phase of this work. The evolution of carbon dioxide inside spaces, with different airflow typologies, was then predict...
Numerical simulation of passive and active solar strategies in buildings with c...
Conceição, E. Z. E.; Lúcio, Maria Manuela Jacinto do RosárioIn this paper a numerical software, that simulates the building thermal behaviour with complex topology in transient conditions, was developed and used in the study of kindergarten thermal response and the occupants' thermal comfort and air quality in Mediterranean conditions. In this numerical model a new building three-dimensional grid generation philosophy, closer to the reality, that considers the building ...
Heating, ventilating and air conditioning systems control based in the Predicte...
Conceição, E. Z. E.; Lúcio, Maria Manuela Jacinto do RosárioIn this work a numerical model, which simulates the buildings thermal response and evaluates the indoor environment comfort, in transient conditions, is used in the application of Heating, Ventilating and Air Conditioning (HVAC) systems control, based in the Predicted Mean Vote (PMV) index, in the energy and thermal comfort performance in a kindergarten school building, in the South of Portugal, in Winter condi...
Human thermo-physiological sensation control based in the adaptive comfort phil...
Conceição, E. Z. E.; Farinho, J. P.; Lúcio, Maria Manuela Jacinto do RosárioIn order to improve the building thermal efficiency, increase the human thermal comfort level and to reduce the building energy consumption, in this work, the human thermo-physiological sensation control, based in the adaptive comfort philosophy, is applied. In this control methodology the occupants, during a lesson activity, can choose among the clothing level, the activity level and the natural ventilation sy...
Numerical Study of the Influence of Opaque External Trees with Pyramidal Shape ...
Conceição, E. Z. E.; Lúcio, Maria Manuela Jacinto do RosárioThis paper describes a numerical study of the influence of opaque external trees with pyramidal shape on the thermal behaviour of a school building in Summer conditions. The software used simulates the thermal response of buildings with complex topology under transient conditions. This software has previously been validated by real studies both in Summer and Winter conditions. The school building considered is ...