15 documents found, page 1 of 2

The effect of occupancy and environmental physical variables on classrooms’ nat...

In this paper, we use a path model to study natural ventilation in classrooms and research the link between air change rate, occupancy, and both outdoor and indoor physical variables. In general, the path model is derived from the building physics and occupant behavioral considerations via structural equation modeling (SEM), and allows for the use of continuous observable and unobservable factors. The latter ar...

A Large-Diameter Earth–Air Heat Exchanger (EAHX) Built for Standalone Office Ro...

Earth–air heat exchangers (EAHX) use the soil thermal capacity to dampen the amplitude of outdoor air temperature oscillations. This effect can be used in hot and dry climates for room cooling, and depending on the EAHX design, this cooling can be achieved with very few resources other than those used during EAHX construction. This is an obvious advantage compared to the significant energy consumption and opera...

Particleboard Production from Paulownia tomentosa (Thunb.) Steud. Grown in Port...

Paulownia wood has raised high attention due to its rapid growth and fire resistance. The number of plantations in Portugal has been growing, and new exploitation methods are needed. This study intends to determine the properties of particleboards made with very young Paulownia trees from Portuguese plantations. Single layer particleboards were produced with 3-year-old Paulownia trees using different processing...

Particleboard Production from Paulownia tomentosa (Thunb.) Steud. Grown in Port...

Large Diameter Earth-Air Heat Exchanger for Space Cooling and Heating: Prelimin...

The main goal of the paper is to describe and provide a preliminary discussion of the performance of a large diameter earth -air heat exchanger used in cooling and heating of a small office building located in Alentejo, Portugal. The sole energy consumption associated with this system is that required to operate two fans that move outdoor air into the office spaces. There are no mechanical moving parts inside t...

Performance assessment of a building-integrated photovoltaic thermal system in ...

ABSTRACT: The experimental investigation of building-integrated photovoltaic thermal (BIPVT) solar systems is essential to characterise the operation of these elements under real conditions of use according to the climate and building type they pertain. BIPVT systems can increase and ensure energy performance and readiness without jeopardising the occupant comfort if correctly operated. The present work present...

Performance assessment of a building integrated photovoltaic thermal system in ...

ABSTRACT: This study addresses the thermal and energy performance assessment of a Building Integrated Photovoltaic Thermal (BIPVT) system installed on the facade of a test room in Solar XXI, a Net Zero Energy Building (NZEB) located in Lisbon, Portugal. A numerical analysis using the dynamic simulation tool EnergyPlus was carried out for assessing the performance of the test room with the BIPVT integrated on it...

Performance assessment of a building integrated photovoltaic thermal system in ...

ABSTRACT: This study addresses the thermal and energy performance assessment of a Building Integrated Photovoltaic Thermal (BIPVT) system installed on the facade of a test room in Solar XXI, a Net Zero Energy Building (NZEB) located in Lisbon, Portugal. A numerical analysis using the dynamic simulation tool EnergyPlus was carried out for assessing the performance of the test room with the BIPVT integrated on it...

Ventilação por abertura de janelas: análise de dados experimentais recolhidos e...

ventilação de salas de aula é habitualmente feita por abertura de janelas. Esta é a solução tradicional sendo perfeitamente adequada para tempo quente, porém, quando as temperaturas exteriores baixam, estudantes e professores deixam as janelas fechadas reduzindo substancialmente os caudais de ventilação, resultando na deterioração da qualidade do ar interior. Este artigo tem por objetivo compreender as condiçõe...

Análise experimental do desempenho de envidraçados com películas de controlo solar

A utilização do vidro na construção tem tido uma expressão cada vez mais significativa, resultando em rácios de envidraçado na fachada muito elevados, especialmente em edifícios não residenciais. Esta tendência deve-se às boas características estéticas e óticas do vidro que permitem a entrada de luz natural e visão para o exterior, podendo contribuir para poupanças de energia com iluminação e conforto visual. N...