scholarly journals Implementation of sun-protection devices in industrial buildings with roof system of natural illumination in regions with hot and sunny climatic conditions

2021 ◽  
Vol 244 ◽  
pp. 05011
Author(s):  
Sergey Stetsky ◽  
Tatiana Shchelokova
Keyword(s):  
Sun Protection ◽  
Climatic Conditions ◽  
Natural Light ◽  
Lighting System ◽  
Natural Illumination ◽  
Roof System ◽  
Natural Lighting ◽  
Industrial Buildings ◽  
Protection Devices

The article describes main objects of sun-protection devices implementation in premises of industrial buildings. The study deals with the above mentioned elements, used for buildings with roof system of natural lighting, located in regions with hot and sunny climate. The use of sun-protection in such an outdoor conditions is widely known, but in most cases their implementation is connected with civil buildings. Different structures of roof lighting system are being considered in the article under two main criteria: a sun-protection quality and quantity of natural light, penetrated into the interiors. The conclusion was maid, that the best type of natural lights structures are monitors, equipped with canopies. These are the best in general, with respect not only to insolation limitation and natural

scholarly journals Development and Testing of a Modular Sunlight Transport System Employing Free-Form Mirrors

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 406
Author(s):  
Allen Jong-Woei Whang ◽  
Yi-Yung Chen ◽  
Min-Yih Leu ◽  
Wei-Chieh Tseng ◽  
Yu-Zheng Lin ◽  
...  
Keyword(s):  
High Efficiency ◽  
Polynomial Regression ◽  
Low Cost ◽  
Free Form ◽  
Optical Simulation ◽  
Light Illumination ◽  
Natural Light ◽  
Lighting System ◽  
Natural Lighting ◽  
Illumination System

The energy consumption of artificial lighting and its impacts on health have stimulated research into natural lighting systems. However, natural lighting system designs are mainly custom, making them costly and difficult to replicate. This study took an office space as a testing field in order to develop a highly adaptable and adjustable modular natural light illumination system. We divided the system into multiple module designs, demonstrated the use of simple development and fabrication processes and integrated a freeform reflector into the system. In creating a freeform mirror, the optical simulation results of the tested field were regressed (through polynomial regression) to achieve a uniformly illuminated plane, and a high-efficiency light-emitting system was produced. Finally, an active heliostat was used to collect sunlight, combined with actual manufacturing verification and measurement results, in order to create an excellent indoor lighting system. As a result, we presented a low-cost and easy-to-design natural light illumination system for the assisted lighting of office areas.

scholarly journals Design schemes’ universalization in calculation of daylight factor under side and roof lighting system in buildings

2020 ◽  
Vol 164 ◽  
pp. 02031
Author(s):  
Sergey Stetsky ◽  
Kira Larionova
Keyword(s):  
Universal Design ◽  
Natural Light ◽  
Lighting System ◽  
Design Point ◽  
Design Formula ◽  
Natural Lighting ◽  
Lighting Systems ◽  
Sky Conditions ◽  
Overcast Sky

The article describes the methods of contemporary daylight factor’ (D.F.) design either with top or side natural lighting systems in buildings. The different methods of design, with different design formulas are based on preliminary determination of the type of lighting system used. But this division is rather conditional and not accurate. Sometimes the source of natural light (say, a window in a wall), which traditionally is judged as a source of a side light, is placed higher, than a monitor or skylight on a roof, which usually are determined as a sources of a top light. The same situation can be seen in determination of an angle of observation of a sky vault portion, observed from a design point within the premise considered. Thus, taking into account the above mentioned statements, one can assume, that with no strict division of external natural illumination under the overcast sky conditions, adopted as a basic theory in contemporary domestic «Codes and Regulations on Natural Lighting of Interiors», it is necessary to offer an universal design formula. This one should be based on standard formulas with respect to specific points, typical either to elements of window, monitor or skylight structures.

Influence of Transparent Partitions on Selected Energy Indicators of the Building Located in Central Europe

2014 ◽  
Vol 1020 ◽  
pp. 579-584
Author(s):  
Adam Ujma ◽  
Anna Lis
Keyword(s):  
Central Europe ◽  
Electric Energy ◽  
Natural Light ◽  
Interior Space ◽  
Natural Illumination ◽  
Artificial Lighting ◽  
Natural Lighting ◽  
Energy Indicators

The article discusses basic regulations and demands for windows and natural lighting. It presents results of analysis of lighting of the chosen interior space taking into consideration periods of exploitation of the artificial and natural illumination. The employment of glass of different light permeability were taken into consideration. Results of calculations were used for evaluating time of electric energy needed for artificial lighting in analyzed variants of natural light systems.

Review of the Current State and Future Development in Standardizing Natural Lighting in Interiors

2018 ◽  
pp. 5-26 ◽  
Author(s):  
Stanislav Darula
Keyword(s):  
Human Life ◽  
Natural Light ◽  
Artificial Lighting ◽  
Computer Tools ◽  
Natural Lighting ◽  
Current State ◽  
Minimum Requirements ◽  
Life On Earth ◽  
Window Design

Three elements mainly wind, water and sun seemed to determine in ancient ages the basic phenomena of life on Earth. Architectural history documented the importance of sun influence on urban and building construction already in layouts of Mesopotamian and Greek houses. Not only sun radiation but especially daylight played a significant role in the creation of indoor environment. Later, in the 20th century, a search of interaction between human life in buildings and natural conditions were studied considering well­being and energy conscious design recently using computer tools in complex research and more detail interdisciplinary solutions. At the same time the restricted daytime availability of natural light was supplemented by more efficient and continually cheaper artificial lighting of interiors. There are two main approaches to standardize the design and evaluation of indoor visual environment. The first is based on the determination of the minimum requirements respecting human health and visibility needs in all activities while the second emphasizes the behaviour and comfort of occupants in buildings considering year­around natural changes of physical quantities like light, temperature, noise and energy consumption. The new current standardization basis for daylight evaluation and window design criteria stimulate the study of methodology principles that historically were based on the overcast type of sky luminance pattern avoiding yearly availability of sky illuminance levels. New trends to base the daylight standardization on yearly or long­term availability of daylight are using the averages or median sky illuminance levels to characterise local climatological conditions. This paper offers the review and discussion about the principles of the natural light standardization with a short introduction to the history and current state, with a trial to focus on the possible development of lighting engineering and its standards in future.

Effect of the Window Position in the Building Envelope on Energy Consumption

2018 ◽  
Vol 7 (3) ◽  
pp. 1861
Author(s):  
Neveen Y. Azmy ◽  
Rania E. Ashmawy
Keyword(s):  
Energy Consumption ◽  
Light Intensity ◽  
Environmental Performance ◽  
Lower Energy ◽  
Climatic Conditions ◽  
Building Envelope ◽  
Natural Lighting ◽  
Energy Plus ◽  
Window Position

Windows play a significant role as they largely influence the energy load. Although there are many studies on the energy-efficient windows design, there is still a lack in information about the mutual impact of windows’ size, position and orientation on the energy loads. In this paper, the effect of different window positions and orientations on the energy consumption in a typical room in an administrative building that is located in the hot climatic conditions of Cairo city, Egypt is considered. This case study has been modeled and analyzed to achieve good environmental performance for architectural space, as well as assessing its impact on the amount of natural lighting required by using the Energy Plus program. The study concludes that the WWR (Window Wall Ratio) 20% square north-oriented upper  opening consumes 25% lower energy than the rectangular 3:1 opening in the lower west-oriented façade. The upper openings are the highest in terms of light intensity, as they cover about 50% of the room area. The WWR 30% rectangular north-oriented upper 3:1 opening consumes 29% lower energy than the rectangular lower 3:1opening in the façade. Regarding light intensity, the upper openings are the best for natural lighting as the light covers more than 60% of the room area.                                                                                                                                                               

Activity rhythms of southern brown bandicoots Isoodon obesulus (Marsupialia: Peramelidae) in captivity.

2003 ◽  
Vol 25 (1) ◽  
pp. 81 ◽  
Author(s):  
AN Larcombe
Keyword(s):  
Western Australia ◽  
Activity Patterns ◽  
Time Lapse ◽  
Climatic Conditions ◽  
Late Afternoon ◽  
Activity Rhythms ◽  
Natural Lighting ◽  
Infra Red ◽  
In Captivity ◽  
The Times

The temporal activity patterns of individually housed captive southern brown bandicoots (Isoodon obesulus) were recorded using time-lapse infra-red videorecording. Recordings were made over a period of four continuous days per animal under natural lighting and climatic conditions for Perth, Western Australia during March 2002. Analysis showed that all bandicoots were almost entirely nocturnal and spent ~71% (~17 hr day-1) of their time in their nests. The times of onset of activity were remarkably regular, and occurred both following feeding during the late afternoon and again after dusk (average 1841 hrs). Bandicoots were active for an average of ~7 hr night-1. Virtually all activity involved the bandicoots running around their enclosures (~6.5 hr day-1). This running was interspersed with shorter periods spent feeding (~25 min day-1), grooming (~8 min day-1) and drinking (~2 min day-1). No other behaviours were observed. There was a greater degree of variation in the time of cessation of activity between individuals. Time of cessation ranged from 0039 hrs ± 20 min to 0504 hrs ± 25 min. The average time of cessation of activity was 0315 hrs ± 61 min and was not related to either time of onset of activity or sunrise.

Analysis of the Behavior of an Air Conditioning System Based on the Solar Energy Natural Regulation in Amazonian Climatic Conditions

2020 ◽  
Vol 143 (3) ◽  
Author(s):  
Elson C. Santos ◽  
Emanuel N. Macêdo ◽  
Marcos A. B. Galhardo ◽  
Thiago Oliveira Costa ◽  
André Felipe P. Costa ◽  
...  
Keyword(s):  
Direct Current ◽  
Air Conditioning ◽  
Cooling Capacity ◽  
Climatic Conditions ◽  
Power Modeling ◽  
Frequency Converters ◽  
Industrial Buildings ◽  
Air Conditioning Systems ◽  
Solar Resource ◽  
Installed Capacity

Abstract Air conditioning systems (ACSs) represent one of the main demands for electricity in residential, commercial, and industrial buildings. The use of a photovoltaic air conditioning unit (PVACU) represents an attractive application to this demand for reasons such as environmental concerns and the match between diurnal cooling load and solar resource. A PVACU consists of a photovoltaic generator (PVG) that supply an ACS through direct current to direct current and frequency converters, without energy storage. This system considers the natural adjustment of the ACS cooling capacity according to the PVG power. Modeling the ACS, the PVG, and the thermal load (TL) makes possible to evaluate PVACU performance. For this, a small library’s TL and an ACS supplied by a PVG were used as case study. The PVG installed capacity assumes values of 700, 1000, and 1400 Wp. The simulation results show that the PVACU with a 1400 Wp PVG would be sufficient to regulate internal temperature within international comfort standards in the range of 20 °C to 24 °C. According to the data obtained in the simulations, it was possible to conclude that the PVACU has a large potential to be used in air conditioning of other environments in regions with Amazonian climatic conditions.

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