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Journal articles on the topic 'Shading devices, sun breaker'
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Zhang, Tao, Jia Ping Liu, and Qi Wei Zhang. "A New Navigate Pressure Deflector Louver Sun-Breaker Composed with Multi-Functions of Rainproof and Sun-Shading." Advanced Materials Research 368-373 (October 2011): 3737–40. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.3737.
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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.
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Kensek, Karen, Douglas Noble, Marc Schiler, and Effendi Setiadarma. "Shading Mask: a teaching tool for sun shading devices." Automation in Construction 5, no. 3 (1996): 219–31. http://dx.doi.org/10.1016/0926-5805(96)00147-1.
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Klevets, K. N., and Y. D. Gnevko. "EFFICIENCY OF USE OF SUN-PROTECTED DEVICES." Construction economic and environmental management, no. 2 (2020): 108–15. http://dx.doi.org/10.37279/2519-4453-2020-2-108-115.
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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.
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Karaseva, Larisa V. "Sun Protection of Buildings: Stages and Perspectives of Development." Materials Science Forum 931 (September 2018): 759–64. http://dx.doi.org/10.4028/www.scientific.net/msf.931.759.
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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.
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Sairam, R., P. L. Raviteja, and A. Naresh. "Case Study: Performance Assessment of Various Sun Shades for Hot-Dry Climate." Advanced Materials Research 816-817 (September 2013): 875–81. http://dx.doi.org/10.4028/www.scientific.net/amr.816-817.875.
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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
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Fausti, Patrizio, Simone Secchi, and Nicolò Zuccherini Martello. "The use of façade sun shading systems for the reduction of indoor and outdoor sound pressure levels." Building Acoustics 26, no. 3 (2019): 181–206. http://dx.doi.org/10.1177/1351010x19863577.
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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.
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OHKI, Chikako, Toshihide OKAMOTO, Jyurie TADAKI, Tatsuya YAMAMOTO, Hiroshi OHGA, and Nozomu YOSHIZAWA. "OPTIMIZATION OF OUTSIDE AND INSIDE SUN SHADING DEVICES USING RADIANCE AND NEWHASP." Journal of Environmental Engineering (Transactions of AIJ) 84, no. 766 (2019): 1067–76. http://dx.doi.org/10.3130/aije.84.1067.
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Tran, Chan Ngoc, Nguyen Thi Khanh Phuong, and Ekaterina V. Gorbarenko. "Assessment of the energy efficiency of a window system with a shading device of the egg-crate type." Vestnik MGSU, no. 6 (June 2021): 655–65. http://dx.doi.org/10.22227/1997-0935.2021.6.655-665.
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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.
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Dudzińska, Anna. "Efficiency of Solar Shading Devices to Improve Thermal Comfort in a Sports Hall." Energies 14, no. 12 (2021): 3535. http://dx.doi.org/10.3390/en14123535.
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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.
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Hassan, Ahmad Sanusi, and Yasser Arab. "The Extent of Sunlight Penetration Performance on Traditional Style’s Apartment Façade in Putrajaya, Malaysia." Modern Applied Science 8, no. 5 (2014): 132. http://dx.doi.org/10.5539/mas.v8n5p132.
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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.
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Nadiri, P., M. Mahdavinejad, and P. Pilechiha. "Optimization of Building Façade to Control Daylight Excessiveness and View to Outside." Journal of Applied Engineering Sciences 9, no. 2 (2019): 161–68. http://dx.doi.org/10.2478/jaes-2019-0022.
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Abstract Windows and shading devices play a significant role in designing building facades to control the rate of the received daylight and improve visual comfort. This study is aimed to provide an optimization basis for building’s façade considering two variables of Annual Sun Exposure (ASE (1000/250h)) and the view to outside of an office. In this research, the effect of various parameters of shading louvers to the south was investigated in Tehran, Iran. The parameters were number, depth, angle as well as thickness. In this review, Rhino/Grasshopper plug was employed for simulations; moreover, Galapagos evolutionary solver component was used to run the optimization process. This study’s findings showed that it was possible to reach a view of nearly 90% of the interior spaces while the value of ASE (1000/250h) still remained in the reasonable range.
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Leão, Rui, and Charles Lai. "Tropical Modernity: A Hybrid-Construct in South China." Tropical Architecture in the Modern Diaspora, no. 63 (2020): 56–61. http://dx.doi.org/10.52200/63.a.9u06q3rs.
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Parallel to the discourse of Tropical Architecture and the work of UK architects in the British colonial territories in the Middle East, Africa, and India after the WWII, climate adaptation designs or devices such as brise-soleil, perforated cement bricks, sun shading screens, courtyards, etc., started to emerge in modernist buildings in Asia. This article is a preliminary survey of these cases in Hong Kong and Macau since the 1950s. It discusses how tropicality was used in response to the post-war revisionism of Modern Movement that placed emphasis on local identity and culture.
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Dalumo, David B., and Yaik-Wah Lim. "Comparative Study on Computer Simulation of Solar Shading Performance with Heliodon and Artificial Sky." Journal of Daylighting 8, no. 1 (2021): 50–64. http://dx.doi.org/10.15627/jd.2021.4.
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Current technological advancement and the requirement for sustainability-driven practices has birthed increased demands for accuracy in performance and assessment of energy consumption in the built environment. Energy-efficient and sustainable building projects are to large extents dependent on achieving functional solar shading and sufficient daylighting in building interiors. Hence, the understanding and adequate evaluation of the sun and its dynamic influence on buildings right at the early stage of planning and design is essential for the development of performance-driven building designs. In this study, the performance simulation results of Integrated Environmental Solutions <Virtual Environment> software program modules are examined for accuracy in executing performance analysis of solar shading. This study assesses the shading prediction of Suncast; a virtual solar shading calculation tool, and RadianceIES for measuring daylight availability in a tropical climate region. The evaluation of shading performance with Suncast was validated through physical experiment by comparing the results obtained therein with shading analysis outcomes generated on a scale model with the aid of a heliodon. Likewise, RadianceIES daylighting simulations were compared with measurements realised from an artificial sky simulator. The results were further subjected to correlation tests to determine the relationship between simulation and physical experiment results. The computational evaluation approach presented more efficient means of conducting the performance simulations over the physical experiment methods which were limited by mechanical design of the components. Suncast and RadianceIES simulation results presented comparable equivalence with measurement output acquired from the heliodon and artificial sky respectively, with minimal variations in accuracy. Thus, demonstrating the ability of the computational simulation program in accurately predicting solar shading and daylight performance in buildings, this could benefit architects in the proper and efficient design of shading devices for building facades at early design stages.
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Othman, Ahmad Ridzwan, Mohammad Ezzat Fakhrawi Mohammad Faisal, and Wahyuni Zahrah. "Thermal Comfort in Living Room of Houses with Different Frontage." Environment-Behaviour Proceedings Journal 6, no. 16 (2021): 249–59. http://dx.doi.org/10.21834/ebpj.v6i16.2636.
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House frontage is an essential aspect of terraced house design to ensure the occupant's comfort and healthy living. Four samples selected to evaluate the influence of the window to wall ratio (WWR) towards the internal thermal comfort of the house. The indoor thermal parameters were recorded using HOBOware Data Logger and evaluated using CBE Thermal Comfort Calculator. The study shows that the living room with a bigger WWR had the lowest thermal comfort levels. Besides the WWR, window placements and the shading devices also help in reducing the sun exposure of the frontage wall and increase the indoor thermal comfort. Keywords: Frontage; Thermal Comfort; Window to Wall Ratio; Sun Exposure eISSN: 2398-4287© 2021. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open access article under the CC BYNC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians/Africans/Arabians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia. DOI: https://doi.org/10.21834/ebpj.v6i16.2636
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Tippey, Brett. "Richard Neutra's Search for the Southland: California, Latin America and Spain." Architectural History 59 (2016): 311–52. http://dx.doi.org/10.1017/arh.2016.10.
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AbstractDuring the twentieth century, diverse cultures from around the globe served as vital sources for architects who attempted to merge Modernist ideas with traditional values. Richard Neutra (1892–1970) absorbed ideas from Japan, the American Middle West and his own native Austria, and eventually his study of these regions deeply affected his work. By analysing archival sources and period publications, this article reveals that even before emigrating to the United States (1923), and throughout his career, the cultures of California, Latin America and Spain were also sources for Neutra's work. He travelled extensively throughout these regions, he researched their local customs and architecture and he deftly and purposefully incorporated vernacular elements, such as sun-shading devices, ventilation strategies and interior patios, into his own work. For his Latin American and Spanish colleagues, his work exemplified a successful fusion between their own traditions and Modernist principles.
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Mintorogo, Danny Santoso, Wanda Widigdo, and Anik Juniwati. "PUMICE LAYER: A SOLUTION TO DIMINISH THERMAL ON HORIZONTAL LEFTOVER PLACE IN ROOFTOP." DIMENSI (Journal of Architecture and Built Environment) 46, no. 2 (2020): 155–60. http://dx.doi.org/10.9744/dimensi.46.2.155-160.
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There are many ways to solve thermal on buildings, such as the installation of horizontal and vertical sun-shading devices on four-direction facades. However, rooftops are often ignored. In low-rise to high-rise buildings’ rooftop, there are leftover places exposed to solar heat radiation all day. Some rooftop places are equipped with polymer thermal roof insulation, and some are even without outer thermal insulation. The research aims to find a solution to diminish the horizontal thermal radiation by using eco-friendly material, pumice, as an outer thermal insulation. Exploiting method was used on one roof model as a conventional rooftop (without outer insulation), and another as a modified rooftop model covered with pumice. Couple HOBO data logger U12-012 temperature sensors were used to measure rooftop surface temperatures and room model temperatures. Results show that the thermal radiation were blocked efficiently: 26oC on pumice covered rooftop. It saved 8.4oC room temperature.
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Peng, Changhai, Lu Huang, and Bangwei Wan. "NOVEL INTEGRATED DESIGN STRATEGIES FOR NET-ZERO-ENERGY SOLAR BUILDINGS (NZESBS) IN NANJING, CHINA." Journal of Green Building 10, no. 3 (2015): 89–115. http://dx.doi.org/10.3992/jgb.10.3.87.
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The connotations and denotations of the term net-zero-energy solar buildings (NZESBs) have been in constant flux because of continuous developments in solar heating technology, solar photovoltaic (PV) technology, building energy-storage technology, regional energy-storage technology, and energy-management systems. This paper focuses on innovative strategies for implementing NZESBs in Nanjing, China. These strategies include integrated architectural design, including passive solar design (respecting climatic characteristics and conducting integrated planning based on the environment, building orientation, distance between buildings, building shape, ratio of window area to wall area, and building envelope) and active solar design (integration of the solar-energy-collecting end of the system – collectors and PV panels – with the building surface – roof, wall surfaces, balconies, and sun-shading devices – and the integration of solar-energy transfer and storage equipment with the building). Some Nanjing-specific recommendations and findings on NZESBs are proposed. The results illustrate that NZESBs can be realized in Nanjing if solar energy technologies are appropriately integrated with the characteristics of Nanjing's geography, climate and buildings.
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Aldabesh, Abdulmajeed, Jassmen Soufi, Siddig Omer, and Abdullah Haredy. "Unlocking the Residential Retrofitting Potential in a Three-Degree World: A Holistic Approach to Passive Design in Hot Climates." Buildings 11, no. 6 (2021): 228. http://dx.doi.org/10.3390/buildings11060228.
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The Kingdom of Saudi Arabia (KSA), as one of the largest polluters worldwide, has released its Vision 2030 that seeks sustainable development via economic diversification to transition towards lower CO2 energy systems. Due to fast population and economic growth, the Kingdom is undergoing an increasing volume of construction, which is projected to exacerbate the energy-related emissions. Strategies are needed to decarbonise the housing stock and help bridge the existing performance gap with the updated Saudi Building Code (SBC). This study proposes a holistic retrofitting approach for the Saudi building industry to facilitate the identification of energy consumption reduction optimisation solutions, covering the assessment of insulation, reflective coating surfaces, sun shading devices, efficient glazing solutions, building-integrated renewables, and green roofs. The proposed flexible approach proved how blended retrofit packages provide improved performance, with rooftop photovoltaic microgeneration and improved glazing technologies singlehandedly outperforming the remaining proposals for KSA’s Riyadh climate conditions. Only the photovoltaic system could meet the simulated SBC performance benchmark independently, positioning it as an instrumental tool in improving the overall effectiveness of the retrofit packages.
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MARTOKUSUMO, Widjaja, M. Donny KOERNIAWAN, Heru W. POERBO, Nissa A. ARDIANI, and Susan H. KRISANTI. "ALGAE AND BUILDING FAÇADE REVISITED. A STUDY OF FAÇADE SYSTEM FOR INFILL DESIGN." JOURNAL OF ARCHITECTURE AND URBANISM 41, no. 4 (2017): 296–304. http://dx.doi.org/10.3846/20297955.2017.1411847.
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Buildings account for around 30 percent of the world’s total energy consumption and a similar percentage of the world’s greenhouse gas emissions the main cause of climate change. The building sector is a major energy consumer, and empirical research reveals that carbon-dioxide emissions from the building sector exceed those of the industry and transport sectors. Contextual juxtaposition has commonly been applied in designing a new building in the historic district. In the realm of design, such philosophy-based design approach requires objective measurements. When new glass building considered, the question on greenhouse gas emissions becomes significant. To minimize energy consumption and reduce sun glare, brise-soleil and horizontal fixed shading devices have been used as elements of building’s facade. Nowadays, algae as part of building facade system have been used in creating a healthier indoor environment. This paper is written based on an on-going architectural design-based research on the use and role of algae as part of the building facade system. The new building of ITB Innovation Park is used as an infill project. With the help of modelling and extensive literature survey, this research will investigate how far the building (facade) design is affected by considerations on energy consumption pattern and environmental condition.
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Matsui, N., C. N. Long, J. Augustine, et al. "Evaluation of Arctic broadband surface radiation measurements." Atmospheric Measurement Techniques 5, no. 2 (2012): 429–38. http://dx.doi.org/10.5194/amt-5-429-2012.
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Abstract. The Arctic is a challenging environment for making in-situ surface radiation measurements. A standard suite of radiation sensors is typically designed to measure incoming and outgoing shortwave (SW) and thermal infrared, or longwave (LW), radiation. Enhancements may include various sensors for measuring irradiance in narrower bandwidths. Many solar radiation/thermal infrared flux sensors utilize protective glass domes and some are mounted on complex mechanical platforms (solar trackers) that keep sensors and shading devices trained on the sun along its diurnal path. High quality measurements require striking a balance between locating stations in a pristine undisturbed setting free of artificial blockage (such as from buildings and towers) and providing accessibility to allow operators to clean and maintain the instruments. Three significant sources of erroneous data in the Arctic include solar tracker malfunctions, rime/frost/snow deposition on the protective glass domes of the radiometers and operational problems due to limited operator access in extreme weather conditions. In this study, comparisons are made between the global and component sum (direct [vertical component] + diffuse) SW measurements. The difference between these two quantities (that theoretically should be zero) is used to illustrate the magnitude and seasonality of arctic radiation flux measurement problems. The problem of rime/frost/snow deposition is investigated in more detail for one case study utilizing both SW and LW measurements. Solutions to these operational problems that utilize measurement redundancy, more sophisticated heating and ventilation strategies and a more systematic program of operational support and subsequent data quality protocols are proposed.
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Matsui, N., C. N. Long, J. Augustine, et al. "Evaluation of arctic broadband surface radiation measurements." Atmospheric Measurement Techniques Discussions 4, no. 4 (2011): 4911–36. http://dx.doi.org/10.5194/amtd-4-4911-2011.
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Abstract. The Arctic is a challenging environment for making in-situ radiation measurements. A standard suite of radiation sensors is typically designed to measure the total, direct and diffuse components of incoming and outgoing broadband shortwave (SW) and broadband thermal infrared, or longwave (LW) radiation. Enhancements can include various sensors for measuring irradiance in various narrower bandwidths. Many solar radiation/thermal infrared flux sensors utilize protective glass domes and some are mounted on complex mechanical platforms (solar trackers) that rotate sensors and shading devices that track the sun. High quality measurements require striking a balance between locating sensors in a pristine undisturbed location free of artificial blockage (such as buildings and towers) and providing accessibility to allow operators to clean and maintain the instruments. Three significant sources of erroneous data include solar tracker malfunctions, rime/frost/snow deposition on the instruments and operational problems due to limited operator access in extreme weather conditions. In this study, a comparison is made between the global and component sum (direct [vertical component] + diffuse) shortwave measurements. The difference between these two quantities (that theoretically should be zero) is used to illustrate the magnitude and seasonality of radiation flux measurement problems. The problem of rime/frost/snow deposition is investigated in more detail for one case study utilizing both shortwave and longwave measurements. Solutions to these operational problems are proposed that utilize measurement redundancy, more sophisticated heating and ventilation strategies and a more systematic program of operational support and subsequent data quality protocols.
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Rayaz, S., and S. Rubab. "Review of Advanced Daylighting Systems." Materials Science Forum 760 (July 2013): 79–84. http://dx.doi.org/10.4028/www.scientific.net/msf.760.79.
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Daylight is the most underutilized resource in modern buildings. Artificial light can be dispensed away in institutional buildings such as offices, banks, schools etc. having only daytime occupancy by proper architectural design of fenestrations The design of a day lighting space is both an art and a science. The biggest challenge facing the lighting designer is to admit only as much light as necessary and distribute it evenly throughout the space without introducing glare or heat. In hot / warm climates, it has become common practice in windows spaces to specify blinds and glazing with high shading coefficients to control glare and minimize heat gain. However, this practice reduces the effectiveness of lighting systems that dim automatically. Improved systems are needed to capture natural daylight and distribute it uniformly throughout a space while controlling heat gain and glare. One such system is the light shelf. Light shelves shade the space from direct sunlight and reflect this sunlight onto the ceiling for a deeper and more uniform distribution. Reflective blinds offer good control of glare and solar protection. Innovative day lighting systems are designed to redirect sunlight or sky light to areas where it is needed with excessive luminance and glare. These systems use optical devices that initiate reflections, refractions, and / or use total internal reflection of sunlight and sky light. Advanced day lighting systems can be designed to actively track the sun or passively control the direct sunlight and sky light. In this paper, we review the state of the art of several advanced day lighting systems which are designed to maximize the energy-saving potential of day lighting, while improving comfort and visual performance at an “affordable” cost.
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Conceição, Eusébio, João Gomes, Maria Manuela Lúcio, and Hazim Awbi. "Shading devices applied to sun control in occupied spaces in summer conditions." Sukatha procedia, August 13, 2021, 127–39. http://dx.doi.org/10.32438/sa.120.3007.
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This work presents a study of a numerical building dynamic simulation in the development of a horizontal shading device passive solution applied in a university canteen. The used building dynamic simulation software, that simulates simultaneously a building or groups of buildings with complex topologies, in transient conditions, considers the solar radiation, the HVAC system, glass radiative proprieties, radiative heat exchanges, thermal solutions, thermal comfort of occupants, indoor air quality, among others properties. The development of efficient external horizontal shading devices is made by a numerical model that uses the sun's trajectory and its position in relation to the windows where it falls. The canteen is constituted by three levels and is divided in 37 spaces. In the numerical simulation, 100 transparent surfaces and 773 opaque surfaces are considered. Special attention is given in the students’ main canteen, professors’ main canteen, specialized canteen and university bar. The simulation is made, in summer conditions, considered the selected spaces without and with horizontal shading devices placed above their windows. In the simulation, the occupancy and the implemented ventilation system are considered. Regarding to the obtained results the use of horizontal shading devices can reduce the air temperature range and improve the thermal comfort level that the occupants are subjected in some of the analyzed spaces.
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"Effect on Thermal Performance by Different Types of Fixed Sun Shading Devices." International Journal of Engineering and Advanced Technology 9, no. 3 (2020): 3713–18. http://dx.doi.org/10.35940/ijeat.c6298.029320.
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An application of sun-shading device is one of the options to elevate the exterior façade appearance while keeping the thermal performance at the best for the indoor. This research aimed to evaluate the effectiveness of selected types of fixed passive sun-shading devices installed at three-story terrace shop houses in Malaysia. Most previous studies on this passive strategy have been conducted via software simulation, in which results were not validated by field measurement. Therefore, this research employed stationary experiment on actual building and meteorological condition using three types of fixed shading devices: egg crates (SDE), vertical (SDV), and horizontal (SDH). SDE showed significant improvement on indoor thermal environment by reducing indoor air temperature (Ta ) of about 0.98 K on the average of a month and 2.11 K on the highest temperature on the average of a month. SDE also showed significant performance during the hottest sunny day, in which it reduced 1.23 K for the average of a day. Meanwhile, on the hottest peak time, SDE reduced 5.40 K compared to the control room. Similarly, for indoor mean radiant temperature (Tmrt), SDE showed notable performance during the high peak temperature on the average of a month (2.38 K) and during the hottest day (7.70 K) compared to control room, SDV, and SDH. On top of that, SDH also showed similar performance as SDE on the average of a month by a difference of 0.03 K. The experimental results also indicate that SDH showed the best performance at night by releasing heat faster than other types of sun-shading devices. This passive solution is one of the best options to improve indoor thermal performance and potentially contribute to energy savings on the building operation.