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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...
The application of UAVs in the evaluation of thermal comfort levels in building...
Conceição, Maria Inês; Conceição, Eusébio; Grilo, António; Basiri, Meysam; Awbi, HazimA greenhouse is used to improve thermal comfort (TC) levels for its occupants in winter conditions using solar radiation, which involves low energy consumption. The aim of this research is the application of unmanned aerial vehicles (UAVs) in the evaluation of thermal comfort levels in buildings equipped with internal greenhouses. The new building design is developed numerically, and a building thermal simulato...
Application of semi-circular double-skin facades in auditoriums in winter condi...
Conceição, Maria Inês; EZE, Conceicão; Lúcio, Maria Manuela Jacinto Do Rosário; Gomes, João; Awbi, HazimThe DSF (double-skin facade) system is an important element in building design and is used in adjacent spaces to control the inlet solar radiation, heat the air, reduce energy consumption, decrease the acoustics levels, and produce photovoltaic energy, among other improvements. The DSF system can, for example, be used in winter conditions to heat the air, which is then transported to non-adjacent spaces to impr...
Energy production of solar DSF for ceiling-mounted localized air distribution s...
Conceição, Eusébio; Gomes, João; Lúcio, Maria Manuela; Awbi, HazimThis paper presents an application of energy production in a solar Double Skin Facade (DSF) used in a Heating, Ventilation and Air-Conditioning (HVAC) system for a ceiling-mounted localized air distribution systems in a virtual classroom. In this numerical work, a virtual classroom, an inlet ceiling-mounted localized air distribution system, an exhaust ventilation system, and a DSF system are considered. The nu...
Comparative study of a clean technology based on DSF use in occupied buildings ...
EZE, Conceicão; Gomes, João; Lúcio, Maria Manuela Jacinto Do Rosário; Conceição, Maria Inês; Awbi, HazimThis paper presents a comparative study of a clean technology based on a DSF (double skin facade) used in winter conditions in the occupied buildings comfort improvement, namely the thermal comfort and air quality. The performance of a solar DSF system, the building’s thermal response, the internal thermal comfort and the internal air quality are evaluated. In this study, a DSF system, an air transport system a...
Application of horizontal confluents jets in a school virtual chamber
Conceição, Eusébio; Conceição, Mª Inês; Gomes, João; Lúcio, Maria Manuela Jacinto Do Rosário; Awbi, HazimThe study presented in this work is performed in a virtual chamber, similar to an existing experimental chamber, with dimensions of 4.50×2.55×2.50 m3. The chamber, occupied with twelve virtual manikins, is equipped with six tables, twelve chairs, one exhaust system and one inlet system, based in confluents jets system. In the exhaust system are considered six air ducts, located above the head level, connected t...
Production of thermal energy in university building greenhouses in cold climate...
Conceição, Eusébio; Gomes, João; Lúcio, Maria Manuela Jacinto Do Rosário; Awbi, HazimThe present work focuses on the production of thermal energy in University building greenhouses in cold climate conditions. The building model uses a system of energy and mass balance integral equations, which are solved by the Runge–Kutta–Felberg method with error control. This numerical study is about the thermal behaviour of a university building with complex topology, in winter and transient conditions. The...
Energy production in solar collectors in a university building used to improve ...
Conceição, Eusébio; Gomes, João; Lúcio, Maria Manuela Jacinto Do Rosário; Awbi, HazimIn this numerical study the energy production in solar collectors in a University building used to improve the internal thermal conditions is made. Passive and active solutions, using external solar collector and internal thermo-convectors, are used. The numerical simulation, in transient conditions, is done for a winter typical day with clean sky. This numerical study was carried out using a software that simu...
Evaluation of integral effect of thermal comfort, air quality and draught risk ...
Conceição, Eusébio; Awbi, HazimThis work evaluates the integral effect of thermal comfort (TC), indoor air quality (IAQ) and Draught Risk (DR) for desks with four personalized ventilation (PV) systems. The numerical study, for winter and summer thermal conditions, considers a virtual chamber, a desk, four different PV systems, four seats and four virtual manikins. Two different PV configurations, two upper and two lower air terminal devices ...