Navegando por Assunto "Architecture and solar radiation"

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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.
Acesso aberto (Open Access)
Técnicas para avaliação do desempenho térmico e lumínico associado a sistemas de prateleira de luz em clima quente e úmido
(Universidade Federal do Pará, 2013-09-27) SILVA, Marcelle Vilar da; FRANCO, Irving Montanar; http://lattes.cnpq.br/4254203203850909
When using a daylight system in a hot and humid climate region, with a elevated number of hours of insolation and high intensity of solar radiation, it is mandatory to evaluated the effects on the thermal performance and environmental luminosity, to identify their potential for use in a controlled and appropriate manner. The aim is to carry out a performance analysis, but more specifically ensure a critic and carefull approach to methodology for assessing the increase of heat, light gains -in hot and humid climate-, through fenestrations with shading protection systems, the comparative studies of efficiency where done to compared systems with and without shading protection through the calculation of solar heat gains using the CSTB method (adapted by Frota e Schiffer), internal illuminance levels where done with computer simulations (RELUX 2006), variation of internal temperatures (ECOTEC v.2) and measurements under real sky condition, with reduced scale models, air temperature measurement, globe temperature and internal and external illuminance, using data loggers, for calculating the daylight coefficient (CLD), infrared thermal imaging to monitor the internal and external surface temperatures. Processing data with auxiliary of regression curves where used to ensure the accuracy of the measurements and identify the quality of the equipment and data refinement. Where verified as results that the systems had very similar performance, but with some relative indicative differences levels for internal illuminance. The shading method analyses shown similar analytical angle generated by the solar protections adopted the prototypes, offering a 40.14% reduction on the thermal load for the north façade. The simulations indicate that the proposed lightshelf could reveal potencial for luminance levels improvements at the center portion of the environment when compared to the tradicional shading device, indicative of potential for future studies. The internal temperature measurements generated very close values between the shelf and the traditional light shading device, what was not enough to demonstrate differential heating. Studies in infrared shown to be efficient to identify surfaces temperatures conditions as thermal energy – heat gains -, drived inside by the boards of the shading device and the lightshelf. For the light shelf the internal illuminance measurements showed significantly increased levels near the window, and at the more inner illuminance measurement point presented an difference of 500lux , this specifically occurred regarding the traditional shading device only 11:00 to 13:30. The DLF – Day Light Factor - indicated that the availability of light in the environment of the center position of the prototype is higher with light shelf than with the traditional shading device and in the more inner illuminance measurement point both indicate mostly similar performances.