Use of Solar Power at Heating Treatment of Concrete

2019 ◽  
pp. 54-57
Keyword(s):  
Heat Treatment ◽  
Solar Energy ◽  
Construction Industry ◽  
Alternative Energy ◽  
Strength Development ◽  
Construction Site ◽  
Heating Treatment ◽  
Modern Level ◽  
The Subject

The article considers the introduction of alternative energy as a safer and more environmentally friendly instead of the traditional, in particular when manufacturing monolithic concrete and reinforced concrete products. Monolithic concreting under the conditions of the construction site is now widespread in the construction industry. The subject of the article is the issues of heat treatment of concrete and acceleration of its hardening processes using solar energy. A brief review and classification of the most well-known and common energy sources used for acceleration of strength development in the concrete mix such as wind power, biofuels, solar energy, alternative hydropower are given. Attention is paid to solar energy - the energy obtained from solar radiation. The sun as an inexhaustible and affordable source supplies energy, exceeding several times the traditional sources. Therefore, this type of alternative energy was chosen, which is used in various spheres of the national economy, especially in the field of construction. Already existing methods of heat treatment of concrete with the help of solar technology are considered, the modern level of development of these methods is defined and further ways of their development are planned.

The Usage of Solar Power in the Heating Treatment of Concrete

2021 ◽  
pp. 44-50
Author(s):  
Alexander M. Ibragimov ◽  
Lyubov Y. Gnedina ◽  
Svetlana V. Gerasimova
Keyword(s):  
Heat Treatment ◽  
Reinforced Concrete ◽  
Solar Energy ◽  
Alternative Energy ◽  
Heat Transfer Process ◽  
Reinforced Concrete Structure ◽  
Heating Treatment ◽  
Modern Level ◽  
Analytical Expressions

This article proposes the usage of alternative energy instead of traditional, as safer, and environmentally friendly for the planet and all humankind in the manufacture of monolithic concrete and reinforced concrete products. Monolithic concreting in the conditions of the construction site is now widespread in the construction industry. The subject of the article is considered of the issues of heat treatment of concrete and acceleration of its hardening processes using solar energy. A brief review and classification of the most well-known and common energy sources used to harden acceleration of the concrete mix such as wind power, biofuels, solar energy, alternative hydropower is given. For consideration in the article offers the solar energy – the energy received from solar radiation. The sun as a source is an inexhaustible and affordable type of energy that supplies energy several times higher than traditional sources. In this regard, attention is paid to this field of alternative energy when using it in various spheres of the national economy, especially in the field of construction. Already existing methods of heat treatment of concrete with the help of solar technology are considered, the modern level of development of these methods is defined and further ways of their development are planned. As an example, a physical and mathematical model of a non-stationary heat transfer process in a flat reinforced concrete structure during its heat treatment using solar energy, considering the hydration of cement, is considered. Analytical expressions are obtained that allow us to model the process at any stage and actively intervene and adjust the external parameters to create rational and comfortable conditions for increasing the strength of concrete.

scholarly journals Construction safety performance assessment on construction site through frequency adjusted importance index in Tangerang Selatan

2019 ◽  
Vol 276 ◽  
pp. 02021
Author(s):  
Ferdinand Fassa ◽  
Irma Paramita Sofia
Keyword(s):  
Construction Industry ◽  
Safety Issue ◽  
Rapid Development ◽  
Construction Project ◽  
Safety Training ◽  
Construction Site ◽  
Construction Work ◽  
Importance Index ◽  
The Subject ◽  
Project Site

The construction industry has a huge contribution to economic growth in the world, including Indonesia. Massive urban development occurs as a result of significant population growth. Along with the rapid development, safety issue in the construction site is often neglected. In 2017, there were found that more than 123 thousand cases of construction site accidents have happened. This numbers has increased by almost 20% compared with the number of accidents in 2016. The purpose of this study is to identify significant safety indicators affecting the construction project in Tangerang Selatan. Based on the literature review, a list of 22 safety indicators was produced. These indicators were used in the questionnaire. The main contribution of this paper is providing safety indicators ranking that affects construction work around Tangerang Selatan. The subject of this research includes contractor and consultant experts who work in construction project around Tangerang Selatan. From the survey, we obtained 41 valid responses which then were analyzed using FAII. As a result, we found that the indicator “the company provides safety training for each worker to act safely” has been considered as the most important safety indicator. It is followed by “the contractor always provides PPE such as helmets, boots, gloves, masks, and other tools that can get me out of an accident”. Then the third result is “there are safeguards on the project site; safety signs, fire extinguishers, and security fences”.

scholarly journals Le maître d'oeuvre sur un chantier de construction

2005 ◽  
Vol 29 (1) ◽  
pp. 147-182
Author(s):  
René Napert ◽  
François Darveau
Keyword(s):  
Construction Industry ◽  
Occupational Safety ◽  
Well Being ◽  
Construction Site ◽  
Workplace Accidents ◽  
The Subject ◽  
Health And Well Being

The construction industry is a prime area for workplace accidents and as such The Health and Occupational Safety Act devotes an entire chapter to the subject. The objective of suppressing danger at its source has required making the foreman the most important agent for looking after the health and well-being of workers. Based on caselaw, this article focuses on sharpening the notion of the foreman acting in the workplace within the framework of The Health and Occupational Safety Act. Two major aspects are developed : that of the identification of the foreman and his obligations on a construction site.

СОЦИАЛЬНАЯ КОНФЛИКТОЛОГИЯ: ТЕОРЕТИКО-ИСТОРИЧЕСКИЙ АСПЕКТ

2020 ◽  
Vol 15 (2) ◽  
pp. 68
Author(s):  
А. Н. Сухов
Keyword(s):  
Theory And Practice ◽  
Important Task ◽  
Social Conflicts ◽  
Psychological Approach ◽  
Structure Dynamics ◽  
History Of ◽  
The Subject ◽  
First Time

This given article reveals the topicality not only of destructive, but also of constructive, as well as hybrid conflicts. Practically it has been done for the first time. It also describes the history of the formation of both foreign and domestic social conflictology. At the same time, the chronology of the development of the latter is restored and presented objectively, in full, taking into account the contribution of those researchers who actually stood at its origins. The article deals with the essence of the socio-psychological approach to understanding conflicts. The subject of social conflictology includes the regularities of their occurrence and manifestation at various levels, spheres and conditions, including normal, complicated and extreme ones. Social conflictology includes the theory and practice of diagnosing, resolving, and resolving social conflicts. It analyzes the difficulties that occur in defining the concept, structure, dynamics, and classification of social conflicts. Therefore, it is no accident that the most important task is to create a full-fledged theory of social conflicts. Without this, it is impossible to talk about effective settlement and resolution of social conflicts. Social conflictology is an integral part of conflictology. There is still a lot of work to be done, both in theory and in application, for its complete design. At present, there is an urgent need to develop conflict-related competence not only of professionals, but also for various groups of the population.

Solar Water Distillation Using Two Different Phase Change Materials

2014 ◽  
Vol 592-594 ◽  
pp. 2409-2415 ◽  
Author(s):  
S. Naga Sarada ◽  
Banoth Hima Bindu ◽  
Sri Rama R. Devi ◽  
Ravi Gugulothu
Keyword(s):  
Solar Energy ◽  
Phase Change ◽  
Fresh Water ◽  
Alternative Energy ◽  
Potable Water ◽  
Sea Water ◽  
Underground Water ◽  
Solar Still ◽  
Water Distillation ◽  
The World

In recent years with the exacerbation of energy shortage, water crisis increases around the world. With the continuous increase in the level of greenhouse gas emissions, the use of various sources of renewable energy is increasingly becoming important for sustainable development. Due to the rising oil price and environmental regulations, the demand of utilizing alternative power sources increased dramatically. Alternative energy and its applications have been heavily studied for the last decade. Energy and water are essential for mankind that influences the socioeconomic development of any nation. Pure water resources become more and more scarce every day as rivers, lakes wells and even seawater pollution rapidly increases. Solar energy is one promising solution to secure power and potable water to future generation. The process of distillation can be used to obtain fresh water from salty, brackish or contaminated water. Water is available in different forms such as sea water, underground water, surface water and atmospheric water. Clean water is essential for good health. The search for sustainable energy resources has emerged as one of the most significant and universal concerns in the 21st century. Solar energy conversion offers a cost effective alternative to our traditional usages. Solar energy is a promising candidate in many applications. Among the alternative energy sources used for electricity production, wind and solar energy systems have become more attractive in recent years. For areas where electricity was not available, stand alone wind and solar systems have been increasingly used. The shortage of drinking water in many countries throughout the world is a serious problem. Humankind has depended for ages on river, sea water and underground water reservoirs for its fresh water needs. But these sources do not always prove to be useful due to the presence of excessive salinity in the water. To resolve this crisis, different methods of solar desalination have been used in many countries. Distillation is a well known thermal process for water purification, most importantly, water desalination. Most of the conventional water distillation processes are highly energy consuming and require fossil fuels as well as electric power for their operation. Single basin solar still is a popular solar device used for converting available brackish or waste water into potable water. Because of its lower productivity, it is not popularly used. Numbers of works are under taken to improve the productivity and efficiency of the solar still. There are large numbers of PCMs that melt and solidify at wide range of temperatures, making them attractive in a number of applications. PCMs have been widely used in latent heat thermal storage systems for heat pumps, solar engineering and spacecraft thermal control applications. The use of PCMs for heating and cooling applications for buildings has been investigated within the past decade. The experimental results computed in the field of water distillation process using solar energy in the presence of energy storage materials sodium sulphate and sodium acetate are discussed in this paper. Keywords: solar energy, saline water, distillation, phase change material.

Micro Solar Thermal Collector Glazing for Enhanced Thermal Energy Harvesting

2012 ◽  
Author(s):  
E. Ogbonnaya ◽  
L. Weiss
Keyword(s):  
Solar Energy ◽  
Thermal Energy ◽  
Alternative Energy ◽  
Capture Efficiency ◽  
Solar Thermal ◽  
Small Scale ◽  
Collector Plate ◽  
Research Areas ◽  
Area Of Interest ◽  
Solar Thermal Collector

Increasing focus on alternative energy sources has produced significant progress across a wide variety of research areas. One particular area of interest has been solar energy. This has been true on both large and small-scale applications. Research in this paper presents investigations into a small-scale solar thermal collector. This approach is divergent from traditional micro solar photovoltaic devices, relying on transforming incoming solar energy to heat for use by devices like thermoelectrics. The Solar Thermal Collector (STC) is constructed using a copper collector plate with electroplated tin-nickel selective coating atop the collector surface. Further, a unique top piece is added to trap thermal energy and reduce convective, conductive, and radiative losses to the surrounding environment. Results show a capture efficiency of 92% for a collector plate alone when exposed to a 1000 W/m2 simulated solar source. The addition of the top “glazing” piece improves capture efficiency to 97%. Future work will integrate these unique devices with thermoelectric generators for electric power production. This will yield a fully autonomous system, capable of powering small sensors or other devices in remote locations or supplementing existing devices with renewable energy.

Latviešu metālmūzikas albumu nosaukumi

2021 ◽  
pp. 361-369
Author(s):  
Ingars Gusāns
Keyword(s):  
Current Situation ◽  
Creative Work ◽  
Distinctive Character ◽  
Literary Works ◽  
The Third ◽  
Metal Music ◽  
Local Character ◽  
The Subject ◽  
The Common

The aim of the study is to describe the titles of Latvian metal music albums, from the perspective of content, by identifying the common and distinctive character of the metallic music tradition, and perhaps even the local one. Of 241 album titles (data on Dec. 31, 2019), most are in English, some in French, Latin, Russian, some consisting of digits, and 69 titles in Latvian. These titles are the subject of the research. The main source is Encyclopaedia Metallum (www.metal-archives.com), which still does not reflect the current situation concerning Latvian metal music. Album titles in this study are viewed separately from album designs and song titles and are analysed from the perspective of content. The album title is an important part of the work that has been issued because it is an element that makes the audience/buyer pay attention to the album because it must not be forgotten that today the album is also an item that you want to sell. In general, it can be concluded that Latvian metal musicians, with their album titles in Latvian, are mostly following world trends, as evidenced by the integration in the researcher Deena Weinstein’s classification of Dionysian discourse and discourse on chaos. Most titles are more relevant to the discourse on chaos because the thematic circle of chaos is wider. Latvian mythology, along with history, is an up-to-date source for the creative work of bands that is responsible for the local feeling of the titles. A large enough number are titles that are difficult to fit in the Weinstein’s division and form the third group with philosophical titles and simply all sorts of titles. If the philosophical titles follow the world’s trends, the simple titles include the names of the events, tributes, and the titles of literary works, which give them a local character.

CLASSIFICATION OF RUSSIAN CULTURE-BOUND TERMS AND THEIR EQUIVALENTS BASED ON THE TRANSLATION OF “QUIET FLOWS THE DON” BY M. A. SHOLOKHOV

2020 ◽  
Vol 76 (4) ◽  
pp. 149-155
Author(s):  
SVETLANA S. UZHAKINA ◽  
Keyword(s):  
English Language ◽  
Great Influence ◽  
Political Life ◽  
Daily Routine ◽  
The Novel ◽  
Russian Culture ◽  
The Subject ◽  
Cultural Component ◽  
Historical Epoch

The classification of Russian culture-bound terms used in the novel “Quiet Flows the Don” by M. A. Sholokhov and in its translation into the English language. The novel “Quiet Flows the Don” by M.A. Sholokhov and its translation into English done by Robert Daglish have served as the source for the research of culture-bound terms. These terms have been classified on the basis of the subject division offered by S. Vlakhov and S. Florin. It is proved that the interest to the study of culture-bound terms is still important. The relevance of the research is determined by the fact that despite numerous research papers in this field the origin, classification and translation of these terms still need some investigation. The aim of the present study is to classify the culture-bound terms taken from the novel “Quiet Flows the Don” by M.A. Sholokhon and its translation into the English language. As a result, there have bben taken 407 samples of the lexical units with a cultural component which were classified according to the subject principal offered by S. Vlakhon and S. Florin. The culture-bound terms have a great influence on a foreign reader as they are cultural units that transmit the information of the daily routine and the historical epoch described in the novel. The culture-bound terms taken from the novel “Quiet Flows the Don” by M.A. Sholokhov and its translation are analyzed and classified. The division of the culture-bound terms according to the subject principal allowed to reveal that most terms refer to the daily routine, social and political life and military terms.

RENEWABLE ENERGY INTEGRATION FOR HOT WATER SUPPLY AND HEATING OF BUILDINGS

2021 ◽  
pp. 3-12
Author(s):  
Yu. Selikhov ◽  
K. Gorbunov ◽  
V. Stasov
Keyword(s):  
Solar Energy ◽  
Heat Production ◽  
Heat Supply ◽  
Alternative Energy ◽  
Fossil Fuel ◽  
Heat Pumps ◽  
Climatic Conditions ◽  
Economic Feasibility ◽  
Hot Water ◽  
The Cost

Solar energy is widely used in solar systems, where economy and ecology are combined. Namely, this represents an important moment in the era of depletion of energy resources. The use of solar energy is a promising economical item for all countries of the world, meeting their interests also in terms of energy independence, thanks to which it is confidently gaining a stable position in the global energy sector. The cost of heat obtained through the use of solar installations largely depends on the radiation and climatic conditions of the area where the solar installation is used. The climatic conditions of our country, especially the south, make it possible to use the energy of the Sun to cover a significant part of the need for heat. A decrease in the reserves of fossil fuel and its rise in price have led to the development of optimal technical solutions, efficiency and economic feasibility of using solar installations. And today this is no longer an idle curiosity, but a conscious desire of homeowners to save not only their financial budget, but also health, which is possible only with the use of alternative energy sources, such as: double-circuit solar installations, geothermal heat pumps (HP), wind power generators. The problem is especially acute in the heat supply of housing and communal services (HCS), where the cost of fuel for heat production is several times higher than the cost of electricity. The main disadvantages of centralized heat supply sources are low energy, economic and environmental efficiency. And high transport tariffs for the delivery of energy carriers and frequent accidents on heating mains exacerbate the negative factors inherent in traditional district heating. One of the most effective energy-saving methods that make it possible to save fossil fuel, reduce environmental pollution, and meet the needs of consumers in process heat is the use of heat pump technologies for heat production.

Classification of Mason’s Skills by Analysis of Selected Churches of the Broumov Group

2021 ◽  
Vol 109 ◽  
pp. 15-20
Author(s):  
Pavel Kuklík ◽  
Martin Valek ◽  
Charalampos Paschopoulos
Keyword(s):  
Cultural Heritage ◽  
Bearing Capacity ◽  
Construction Industry ◽  
Economic Situation ◽  
Historical Events ◽  
Baroque Architecture ◽  
Current State ◽  
Geological Conditions ◽  
Local Construction

The churches of the Broumov region are renowned for their unique baroque architecture, their distinct shapes, and sizes. They are an integral part of the Czech cultural heritage. If you analyze the churches, it becomes evident that both the local geological conditions and the municipal economic situation have played an important role in their current condition. Moreover, the local construction industry has been significantly affected by historical events. In this article we would like to present the effects of those factors on the current state of selected churches, namely on the bearing capacity of their walls. Besides being very interesting, it also plays a key role in the maintenance and the potential reconstruction of the churches.

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