Navegando por Assunto "Thermal performance"

Agora exibindo 1 - 3 de 3

Acesso aberto (Open Access)
Avaliação através do desempenho térmico de edificação verticalizada em Belém-PA
(Universidade Federal do Pará, 2013-04-01) VINAGRE, Natália Daniele de Lima; PERDIGÃO, Ana Kláudia de Almeida Viana; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148; http://lattes.cnpq.br/9009878908080486
This dissertation studies the thermal performance of materials in a vertical facade building in the city of Belém - PA, Brazil. This work aims to contribute to the study of the thermal performance and efficiency of materials used in residential buildings of the vertical envelopment, between opaque elements, two types of materials currently very used in construction were selected, painting and ceramic coating. It also studies the influence of the height of the building on its thermal performance and energy efficiency. The study was conducted with the use of computational modeling in EnergyPlus code that evaluates the thermal performance of the building, the influence of the height at the same energy efficiency. Compares the thermal performance of the two selected materials, it was found that the ceramic coating presented building with the average internal temperature of 0.42 ° C above the temperature at the building painted, hence less thermal performance. The influence of the height of the floor did not produce a significant variation in internal temperature, because its increase, small decrease occurred in the internal temperature with thermal gradient of about -0.07 º C / m due to the wind speed is greater when more higher the pavement. It is also considered for this study as passive natural ventilation strategy for the building under study, according to the analysis of Bioclimatic chart Givoni contribute positively to the condition of the internal temperature and humidity, and consequently the user.
Acesso aberto (Open Access)
Desempenhos térmico e energético de uma edificação na região amazônica brasileira
(Universidade Federal do Pará, 2018-09-06) AGUILAR, Heliana Maria Ceballos; PINHO, João Tavares; http://lattes.cnpq.br/0847897516772421
This work presents an innovative proposal of integration of several strategies to reduce energy consumption, where the impact of each one of them is evaluated individually, and all together, in the thermal, energetic and economic performance of a building located in the Brazilian Amazon Region. High temperature and humidity characterize this region climatically, where achieving adequate comfort conditions implies a high demand for energy for air conditioning systems. Different Energy Conservation Measures are evatuated in order to achieve a better use of daylighting; and to reduce thermal loads for cooling, with the installation of a thermal insulation material in the eastern and western walls, and a thermal insulation and air chamber in the roof, which are the external surfaces that receive higher solar radiation in the building. Additionally, various photovoltaic generation systems are considered, one of which is integrated as an architectural element and another adapted on the roof of the building. In the building, two types of analysis are conducted: dynamic and static. For the dynamic analysis, the EnergyPlus software is used to know its thermal and energy consumption performances, analyzed for the entire year and for the design day, and the Daysim/Radiance software to know the autonomy of daylighting attained, using data measured with an on-site meteorological station. Concerning the static analysis, the level of energy efficiency is evaluated by the prescriptive method according to the current national regulations. Subsequently, the same building is simulated for the nine capital cities of the states of the Legal Brazilian Amazon Region, with the aim of knowing its energetic performance and the economic feasibility depending on the climatic characteristics and electrical energy tariffs of each city. With the assessments performed, it is determined that the ECM have a direct and significant influence on the reduction of the thermal load for cooling, through the reduction of radiation effects, the shading in the eaves and the reduction of the transmittance of the surfaces treated. The possibility of maximizing the daylight in internal spaces, to improve the comfort of the users is also verified, allowing better performance and energy savings with artificial lighting. In terms of energy consumption and economic feasibility, the ECM achieve an annual energy savings of 52 % in the building taken as a case study, and the solutions adopted show a good return on financial investment, and are also suitable for energy saving and economically feasible in regions with similar climatic characteristics.
Acesso aberto (Open Access)
Impacto da morfologia no desempenho térmico das parcelas urbanas em clima equatorial na cidade de Belém
(Universidade Federal do Pará, 2013-04-11) PINHEIRO, Dorival Freitas; CARDOSO, Ana Cláudia Duarte; http://lattes.cnpq.br/3138101153535395; FRANCO, Irving Montanar; http://lattes.cnpq.br/4254203203850909
The objective of this study is to analyze the impact generated by models of occupation of urban spaces in installments, according to its own characteristics of the variables present in the urban microclimate inherent Neighborhoods Old Town and Umarizal Demonstrate in Belém, from the standard methodology developed, an approximation of the effects of thermal exchanges within the urban portions with their different typologies found, which will allow, besides understanding more approximate of the resulting phenomena of the climatic interaction with the specific typologies, to evidence more appropriate town planning strategies to thermal performance. To demonstrate the effects of these urban parameters and their influence on the quality of the microclimate, were used as strategies for data acquisition, image capture IFR (IR) surface, angled shots with a fisheye lens, record temperatures globe, dry and humid bulb, sun air, field survey of the buildings, together with the technical analysis of energy balance factor Sky View, Built Mass and Cut Heat Load. The Old Town district is inserted in origin of formation of the town and within its context morphological Volumetric has characteristics that in his time been regarded as solutions to climate adaptation, making it conducive to the development of thermal studies. Already Umarizal neighborhood, which is part of the expansion area of the city center, has a characteristic morphological marked a process of increasing vertical integration, especially in the last decade, and with it, has been constituted in the district with the highest profile change and constructive densification of recent years, which defines it as a key to this investigation. Based on some previous studies and looking to add new analysis parameters and concepts, we defined the use of techniques for analyzing of the energy balance and the thermal exchanges urban able to identify, conceptually, the ability to build thermal load and indicate ways implement procedures for analysis of thermal performance of urban fractions. Methodological criteria developed from the investigation of the effects arising from the relationship between local climatological patterns and urban standards of occupancy can be good use, generate urban parameters that enable the occupation of cities not only in their environmental issues in its overall efficiency, pointing to solutions to planners and urban managers to equip a record of the capacity to "load" these determined territories.