Academic literature on the topic 'Shading devices, sun breaker'

Louver is usually used as a sun-shading member in buildings. Nevertheless, the usage of traditional louver sun-breaker is merely limited to its sun-shading function. In present study, a new deflector louver sun-breaker composed with multi-functions of sun-shading, heat-insulation, rainproof and ventilate in summer, thermal insulation and windproof in winter, direct light shading in sunny day and light guiding in cloudy day is developed. The new navigate pressure deflector louver sun-breaker with simple construction and economy durability can improve the energy efficiency of building, increase the comfort of internal environment and beautify the appearance of building facade.

A model of a sun protection device for a window located on the southern facade in the city of Yalta is proposed. A formula for calculating heating gain taking into account shading is proposed, as well as a calculation option of the economic efficiency of a sun protection device. The energy and economic effectiveness of the sun protection device are calculated.

The article deals with the evolution of sun protection of buildings: from traditional shading devices to innovative techniques of dynamic architecture. Special attention is paid to the development of sun protection devices in the XX century and ignoring solar geometry in the works of masters of new architecture. The problem of energy saving has required architects to return to the means of protecting buildings from solar radiation heat. Modern innovative technologies have led to the emergence of a new generation of means of solar radiation control in buildings. The Russian experience of sun shading devices application is considered on an example Rostov-on-Don.

There are many reasons to control the amount of sunlight admitted into a building. In warm, sunny climates excess solar gain may result in high cooling energy consumption. In cold and temperate climates winter sun entering south-facing windows can positively contribute to passive solar heating; and in nearly all climates controlling and diffusing natural Illumination will improve day lighting. A Well-designed sun control and shading devices can dramatically reduce building peak heat gain and cooling requirements and improve the Natural lighting quality of building interiors. In this casestudy Shading Devices commonly found in India are evaluated to find Optimized Shading Device for Hot-Dry Climate of South India

External shading devices are widely used in recent buildings because they reduce the greenhouse effect due to the solar irradiation through transparent surfaces and the glare effects in interiors. The acoustic effects of these devices have not been well investigated in the literature. In this article, we use a bi-dimensional pressure acoustics finite element model of a shading device attached to a building façade, in frequency domain, to analyse the effects both in the indoor and in the outdoor environments. The finite element model was validated with experimental measurements carried out in a semi-anechoic chamber and then extended to an urban scale to evaluate the effect in the reduction of outdoor noise due to traffic. To improve the acoustic effect of the shading device, a sound absorbing material was added to the bottom side of each louvre. Results of the simulations show that external shading devices tend to increase the sound pressure level over the building façade, while the introduction of the sound absorbing material behind each louvre reduces this problem. The dependencies of the sound pressure level reduction to the geometrical factors of the shading device were investigated by means of the finite element model. The installation of louvres on a building façade can affect also the sound pressure level over a façade of a building placed 20 m away, across a road. In this article, both the effect over the façade of the opposite building and the effect over the urban area between the two buildings are analysed.

Introduction. The article proposes a new energy efficiency assessment method based on a new technique used to calculate the window heat gain. The proposed method takes account of the coefficient of irradiance reduction by the sun shading device. The study was carried out for the shading device of the egg-crate type. Materials and methods. Calculations are based on the projection of a sunbeam performed for a fraction of a window area in the shade. They take account of the coefficient of irradiance reduction applied due to the presence of the sun shading device. A shading device reduces the irradiance, caused by diffused solar radiation, and coefficient Kbt is applied to demonstrate this process. This coefficient was identified in an experiment and expressed in the form of regression equations. To evaluate the energy efficiency with regard for the effectiveness of shading devices, coefficient of solar radiation gain reduction β was developed. This coefficient is described by the ratio of the value of solar radiation incoming through a glazed window in the presence of shading device QK to the value of solar radiation incoming through a glazed window that has no shading QKo. The software programme was used to verify the calculations of the heat gain from the solar radiation incoming through the window system with regard for the shading device in various geographical regions in summer (in Hanoi and Moscow). Results. The results, obtained using the proposed methodology and the observation data, show an insignificant difference in the relative value of β; and they demonstrate a major error when qwindow, or the absolute value of heat entering the room, is taken account of. The heat load, incoming through the window system, is down by 42–45 % in Moscow and by 45–53 % in Hanoi in the hottest period of the year if shading devices are used. Conclusions. The proposed methodology and computer software, used for a quick assessment of the energy efficiency of a window system equipped with shading devices, allow to design building envelopes that feature high energy efficiency in terms of air conditioning systems, given that coefficient of radiation gain reduction β is taken account of.

Thermal environment in sports facilities is probably one of the most important parameters, determining the safety and performance of athletes. Such facilities, due to the required operating temperature and physical activity of users, are a serious challenge for both investors and administrators, especially in summer. The additional criterion of low energy consumption in extremely airtight and well-insulated passive buildings often results in overheating of the interior, creating considerable economic and operational problems. The significant need to reduce solar gain during periods of high outdoor temperatures for low-energy buildings prompts a variety of design solutions. Sun shading systems, as an indispensable element of glazed surfaces, are designed to control the amount of solar radiation reaching the building interior, at the same time creating a favorable microclimate inside. This article analyzes the effects of sun shading, which have actually been applied and modified on the southern façade of a passive sports hall in Słomniki. Measurements of the thermal conditions in the hall were the starting point, on the basis of which a model of the object was created in the DesignBuilder program. Using simulation analyses, thermal conditions arising with the use of different variants of internal and external shading devices were studied in the program. The results presented in the article show that in a well-insulated hall of large volume, appropriately selected external shading devices are only able to reduce the access of sunlight to the rooms. External brise-soleils are able to limit the access of solar radiation to the rooms by up to 30%, but this is not enough to guarantee internal thermal comfort. Internal blinds do not affect the interior microclimate significantly and do not protect protection from overheating. Momentary differences in PMV values for different patterns of closing the blinds do not exceed 0.2.

In this study the analysis is to measure the performance on the extent of sunlight penetration on front apartment facades. The apartments are located in Putrajaya, Malaysia. Putrajaya is the administrative city for the federal government, and it is considered the latest new city in Malaysia with postmodern style buildings which exhibit a range of complex geometric elements blending with colonial, modern and traditional architectural style. The scope of this study is to measure the extent of sunlight penetration on the apartment facades. Two front facades of the apartments were selected in the case studies using computer simulation for the analysis. The selected case studies are sixteen stories apartment located in Precinct 17 and seventeen stories apartment located in Precinct 18. SunTool software is used in the survey to calculate the extent of sunlight penetration. The survey will be conducted at a position when the sun path is perpendicular to the house façade. This analysis will compare results of the computer simulations of these two apartments in relation to the facade design of the architectural elements for shading devices. This study finds that the more the application is the traditional shading elements, the more is the shading performance on the façade walls. However this study also finds that traditional shading elements are designed only to block sunlight from horizontal angle of the sun position. They are not designed to obstruct sunlight from vertical angle of the sun position.

Orientador: Lucila Chebel Labaki
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
Made available in DSpace on 2018-08-07T10:20:33Z (GMT). No. of bitstreams: 1 Gutierrez_GraceCristinaRoel_M.pdf: 13332804 bytes, checksum: 2e59e6bab72a64cce872302835c70d3c (MD5) Previous issue date: 2004
Resumo: Esta pesquisa avalia o desempenho térmico do brise-soleil, em relação à radiação solar incidente em ambientes com aberturas protegidas. Os dispositivos testados foram selecionados considerando as tipologias e materiais utilizados em edificações da arquitetura moderna brasileira entre os anos 1930 e 1960. O desempenho térmico do brise-soleil é reconhecido em estudos de geometria de insolação e simulação com software, porém são raras as avaliações experimentais sob condições climáticas reais. A metodologia utilizada é baseada em pesquisas de desempenho térmico de elementos e componentes construtivos realizadas em protótipos. Através de um sistema de aquisição de dados são verificadas: variáveis ambientais (temperatura do ar, umidade relativa, radiação solar, pluviosidade, direção e velocidade dos ventos), e variáveis medidas nos protótipos (temperaturas do ar e superficiais). Os ensaios de campo foram realizados em protótipos localizados em Campinas, SP. Foram testados brise-soleil horizontal e vertical em madeira e concreto, e elemento vazado (concreto), fixos, expostos nas fachadas norte ou oeste, durante uma semana em cada orientação, nos períodos próximos aos equinócios e solstícios de verão e inverno. Nos ensaios realizados, os resultados mostraram a redução pontual de até 4,14ºC na temperatura interna, sendo o melhor desempenho térmico o da tipologia combinada. O brise-soleil vertical fixo perpendicular à fachada apresentou os piores resultados na fachada oeste, contrariando indicações usuais da literatura arquitetônica
Abstract: In this work the thermal performance of shading devices regarding solar radiation in indoor spaces with protected openings is analyzed. The typology and materials of shading devices were selected considering the elements used in Brazilian modern architecture buildings between the 1930 and 1960 decades. Most studies about shading devices are based on geometric drawings and software simulation analyzing the efficiency of provided protection during specific periods, however there are few experimental works performed under real climate conditions. In this investigation, three different devices were evaluated in the most problematic conditions of exposure, by acquiring measurable data of external parameters (air temperature, relative humidity, solar radiation, rain, wind speed and direction) and internal parameters (air temperature and surface temperatures) to verify their efficiency. These experiments were conducted at School of Civil Engineering, Architecture and Urban Design of State University of Campinas (UNICAMP) in the State of São Paulo, Brazil. The investigated devices were horizontal and vertical sun-breakers of concrete and wood, and concrete eggcrate sunbreaker, fixed, on north and west exposures, for a week in each façade, in equinox and summer and winter solstices periods. In these tests, the eggcrate typology showed the best thermal performance, with a punctual reduction of up to 4,14ºC on internal air temperature. The vertical fixed devices registered the worst results on west façade, in contrast with current Brazilian architectural literature recommendation
Mestrado
Edificações
Mestre em Engenharia Civil

abstract: In geographical locations with hot-arid climates, sun control in buildings is one primary problem to solve for the building envelope design. Today's technological advances in building science bring with them the opportunity to design dynamic façade systems for sun radiation control and daylighting. Although dynamic systems can become an attractive visual element, they can be costly and challenging to maintain for building owners. Alternatively, fixed solar-shading systems can be designed to create dynamism in the façade of the building, while providing similar functionalities for sun control. The work presented in this project focuses on the use of a visual scripting editor for modeling software, Grasshopper, to develop a Solar Control Visual Script that evaluates building envelope surfaces with planar and non-uniform rational basis-spline (NURBS) forms and provides projections for fixed sun control systems. The design platform of Grasshopper allows individuals with no experience or prior computer coding education to build up programming-like capabilities; this feature permits users to discover new design possibilities within flexible frames that can contribute to the overall design being pursued, while also having an environmental response. The Solar Control Visual Script provides minimum sizing geometries that achieve shading in openings at a particular date and time of the year. The model for this method of analysis makes use of three components to derive the appropriate values for the projections of shading geometries: typical meteorological year (TMY) data, irradiation isotropic equations and shading profile angles equations for vertical and tilted surfaces. Providing an automatic visual of generated geometries uncovers the opportunity to test several model forms and reiterates the analysis when modifying control parameters. By employing building science as a set of environmental parameters, the design outcome bears a dynamic form that responds to natural force conditions. The optimized results promote an efficient environmental design solution for sun control as an integral alternative into the building envelope.
Dissertation/Thesis
M.S. Built Environment 2012

碩士
淡江大學
建築學系碩士班
95
The main purpose of this study is to discuss the daylighting performance of buildings in the direct solar radiation by horizontal & Sun-reflect shading devices. The research is to find the better combinations of horizontal & Sun-reflect shading devices by the scale model experiments outdoor. And as a result to provide the designer’s reference on the energy conservation of building design. This study includes the following content: Chap 1 To point out the research motive , objective ,assumption, method and procedure. Chap 2 To organize and sort out the specific achievements from related articles collection. And to clarify the connections between various research subjects and establish the research orientation and scope. Chap 3 To analyze the experiment data and to find the better combinations of horizontal & Sun-reflect shading devices. Chap 4 Comparing the experiment data with the reference study on diffuse daylight, and analyzing the difference between the influence of direct daylight and diffuse daylight. Chap 5 To make conclusions and the recommendation of further study.