scholarly journals Solar collectors integrated into transparent facades

2020 ◽  
Vol 26 (3) ◽  
pp. 84-87 ◽  
Author(s):  
Vasyl Zhelykh ◽  
Iryna Venhryn ◽  
Khrystyna Kozak ◽  
Stepan Shapoval
Keyword(s):  
Energy Efficient ◽  
Critical Analysis ◽  
Solar Collector ◽  
Thermal Characteristics ◽  
Thermal Capacity ◽  
International Standards ◽  
Energy Sources ◽  
Solar Collectors ◽  
The World

AbstractDue to the fact that the number of natural disasters in the world has increased in recent years, experts note that climate change is the cause. As a consequence of the nature of the needs to improve the fuel and energy complex in the countries in world. This solution could be solar energy and similar energy sources. The paper presents the classification of energy-efficient houses proposed by international standards and its critical analysis. Emphasis is placed on the problem of improving solar collectors integrated into the construction of buildings. The paper presents the temperature characteristics of an experimental solar collector. For the experimental solar collector combined with the translucent facade of the building, thermal characteristics are set, in particular, such as thermal capacity and thermal efficiency.

Design of Energy Efficient Commercial Buildings in Developing Countries

2012 ◽  
Author(s):  
Essam E. Khalil
Keyword(s):  
Energy Efficient ◽  
Energy Savings ◽  
Renewable Energy Sources ◽  
Thermal Characteristics ◽  
Energy Performance ◽  
International Standards ◽  
Energy Sources ◽  
Domestic Water ◽  
Common Procedure ◽  
Energy Performance Of Buildings

Energy Performance of Buildings should include a general framework for the calculation of energy performance and building categories together with thermal characteristics of building, air conditioning, ventilation, lighting and appliances aspects considered. These include Active solar systems contribution to domestic water heating based on renewable energy sources, CPH production and District cooling systems. This paper reviews the energy sources available in Egypt, their distribution and utilization in commercial sectors. The paper demonstrates the importance of incorporating an energy performance directive as a Standard in our region such a goal will aid energy savings in large buildings and set regulations to energy efficient designs that are based on Standard calculation methods. The proposed Standard would be largely based on International Standards and appropriately modified to suit local practices. The target is to develop standardized tools for the calculation of the energy performance of buildings, with defined system boundaries for the different building categories and different cooling/heating systems. The present work is to provide transparent information regarding output data (reference values, benchmarks, etc.) and to define comparable energy related key values (kWh/m2, kWh per person, kWh per apartment, kWh per produced unit etc.). Proposals to develop a common procedure for an “energy performance certificate” and CO2 emissions are given.

scholarly journals A STATE OF ART AND PROSPECTS OF USED PNEUMATIC TIRES MANAGEMENT (REVIEW)

2021 ◽  
pp. 63-83
Author(s):  
I.O. Mikulionok
Keyword(s):  
Critical Analysis ◽  
Raw Materials ◽  
Chemical Processing ◽  
Detailed Classification ◽  
The World ◽  
Intended Use ◽  
State Of Art ◽  
Frag Ments ◽  
Pneumatic Tires

The basic data on the volume of production of pneumatic tires in the world and in Ukraine are presented. The need to improve the ways of handling pneumatic tires that have lost their con-sumer properties (worn out tires as a result of their intended use and tires rejected as a result of passing quality control during their manufacture) is shown as one of the most dangerous for the environment and promising in terms of using their properties. A detailed classification of methods for handling worn out and defective tires is proposed and a critical analysis of each of them is given. Particular attention is paid to the methods of utilization of tires, in particular, recycling, which makes it possible to efficiently use the secondary raw materials obtained from tires directly for their intended purpose. The features of physical, physicochemical and chemical processing methods, in particular combustion, gasification, pyrolysis of tires and their frag-ments, as well as the prospects for their decomposition under the influence of environmental factors, in particular microorganisms, are also considered. The main ways of solving the prob-lem of tires that have lost their consumer properties in Ukraine are proposed. Bibl. 88, Fig. 2.

scholarly journals Impact of Nocturnal Natural Ventilation On the Energy Consumption of Buildings

2017 ◽  
Vol 13 (2) ◽  
pp. 17-26
Author(s):  
Felicia Uciu ◽  
Tiberiu Catalina ◽  
Andreea Vartires ◽  
Iolanda Colda
Keyword(s):  
Energy Consumption ◽  
Energy Efficient ◽  
Natural Ventilation ◽  
Thermal Characteristics ◽  
Thermal Capacity ◽  
Climatic Parameters ◽  
Night Time ◽  
Time Step ◽  
Factors Influencing ◽  
Efficient Measures

Abstract The analysis presented in this paper is dealing with the correct and energy efficient measures of cooling buildings through nocturnal natural ventilation. Using this solution is proved in this article to be efficient and can reduce substantially the cooling demand. In order to establish the factors influencing the process of passively cooling a building (the ventilation volume, exterior temperature, thermal capacity of the building, possible duration of the ventilation), we have chosen different buildings, which we have placed them in different temperature zones of Romania. The study is based on multiple simulations realized with a time step of one hour, with the following variations: the climatic parameters, the thermal characteristics of the building, the air flow during night time, the proposed interior temperature. Since the study consisted of numerous simulations, in order to treat the results we have used statistical methods that cover the practical and possible situations, and proved the efficiency of nocturnal ventilation.

scholarly journals Analysis of the Influence of the Heat-Absorbing Surface of an Air-Cooled Solar Collector on its Thermal and Mechanical Properties

2019 ◽  
Vol 1 (1) ◽  
pp. 481-489
Author(s):  
Vasyl Zhelykh ◽  
Malgorzata Ulewicz ◽  
Krystyna Kozak ◽  
Olena Savchenko ◽  
Mariana Kasynets
Keyword(s):  
Solar Collector ◽  
Thermal Characteristics ◽  
Solar Collectors ◽  
Pressure Losses ◽  
Solar Systems ◽  
Capital Costs ◽  
Heat Absorber ◽  
The Matrix ◽  
Air Channel ◽  
Maximum Heating

AbstractThis paper presents the analysis of existing forms of heat absorbing surfaces of air solar collectors, which gained the greatest popularity in the world. The obtained data allowed to conclude that there is a need for the development of solar collectors with air as a coolant with an improved form of heat absorber, which will reduce the operational and capital costs of solar systems and allow the efficient use of such structures in a moderate climate without additional mechanisms for the transfer of coolant. The use of computer simulation helped to compare the thermal characteristics of air-borne solar collectors of a different design. The substantiation of the expediency of installing as a heat absorber of flow turbulators in the form of a screw has been fulfilled, as well as the height of the air channel of the solar collector has been determined, in which the maximum heating of the transfer medium is observed. In addition, the loss of pressure in the air channel of the solar collector with flow turbulators was determined and the comparison of the obtained data with the values of pressure losses in the air collector of the matrix type and the air collector with V-shaped ribs was made.

Performance of the Flat Plate Solar Collector Operated with Water-Al2O3 Nanofluid

2016 ◽  
Vol 831 ◽  
pp. 181-187 ◽  
Author(s):  
Janusz T. Cieśliński ◽  
Bartosz Dawidowicz ◽  
Aleksandra Popakul
Keyword(s):  
Flat Plate ◽  
Solar Collector ◽  
Base Fluid ◽  
Fossil Fuels ◽  
Thermal Characteristics ◽  
Working Fluid ◽  
Solar Collectors ◽  
Recent Method ◽  
Flat Plate Solar Collector

Solar collectors is one of the technologies absorbing energy from solar beam and utilizing it for heating purposes, displacing the need to burn fossil fuels. There are many ways to improve effectiveness of the solar collectors [1,2]. Recent method to absorb more heat from the solar beam is to modify thermal characteristics of the working fluid. For this purpose one can use nanofluids, i.e. suspensions of metallic or nonmetallic nanoparticles in a base fluid [3].

scholarly journals Barents region transition to a green economy

2021 ◽  
Vol 258 ◽  
pp. 06056
Author(s):  
Anton Shcherbak ◽  
Sergey Tishkov ◽  
Valentina Karginova-Gubinova
Keyword(s):  
Renewable Energy ◽  
Energy Efficient ◽  
Renewable Energy Sources ◽  
Green Economy ◽  
Energy Sources ◽  
Economic Potential ◽  
Energy Potential ◽  
Barents Region ◽  
The World ◽  
New Energy

The article addresses the development of a green economy through the prism of renewable energy. Currently, interest in the development of renewable energy is growing dramatically, as evidenced by the highest growth of renewable energy among all energy sources in the world balance. The aim of this article is to carry out the quantitative assessment and to estimate economic potential from introduction of promising energy-saving and energy-efficient technologies, new energy sources. This paper considers the energy sector through the renewable energy sources, with a particular focus on the Barents region in view of its specific. The article gives a brief overview of the main types of renewable energy sources in this territory. The article is completed with the evaluation of the energy potential in Russian part of the Barents region.

scholarly journals Identification and Classification of Diseases: Fundamental Problems in Medical Ontology and Epistemology

2013 ◽  
pp. 6-21 ◽  
Author(s):  
Lennart Nordenfelt
Keyword(s):  
Critical Analysis ◽  
18Th Century ◽  
World Health ◽  
Statistical Classification ◽  
The World ◽  
Classification Of Diseases ◽  
International Statistical Classification ◽  
Health Organization ◽  
Health Care Administrator

During the last three centuries there has been remarkable development in the area of the identification and classification of diseases. The taxonomic systems adopted in the 18th century by, for instance, Sauvages and Linnaeus bare no resemblance to the modern nomenclatures for pathological phenomena. The aim of this paper is to give a brief historical presentation, but also a critical analysis, of a number of crucial ideas and theories behind the construction of certain major disease classifications. My focus in the second half of the paper is on the most influential modern systems of classification, the International Statistical Classification of Diseases and Related Health Problems (ICD) and the International Systematized Nomenclature of Human and Veterinary Medicine (SNOMED). The former is the official classification adopted by the World Health Organization and is used mainly for clinical and administrative purposes. The latter is a highly complex system of classification which has recently been developed for a variety of purposes (including medical research) and is meant to be read and handled by computers. ICD, although widely used all over the world, has salient and well-known logical deficiencies. SNOMED has been introduced partly to remedy these deficiencies. I conclude, however, that SNOMED, in spite of its sophisticated resources, cannot completely replace ICD. For many clinical and administrative purposes there is need of a relatively simple system that can be handled by the ordinary doctor and the ordinary health-care administrator.

GREEN AND ENERGY EFFICIENT SOLUTIONS IN THE CONSTRUCTION INDUSTRY

2020 ◽  
Author(s):  
Joze f Švajlenka ◽  
Mária Kozlovská ◽  
Marcela Spišáková
Keyword(s):  
Construction Industry ◽  
Energy Efficient ◽  
Alternative Energy ◽  
Thermal Characteristics ◽  
Environmentally Friendly ◽  
Green Building ◽  
Efficient Solutions ◽  
Energy Sources ◽  
Alternative Energy Sources ◽  
Save Energy

Ecology and environmental protection have been discussed more and more in the last few years. This trend was also affected by the construction and architecture department. Concepts such as green building, environmentally friendly materials, alternative energy sources and energy-efficient construction systems of buildings are depressed. All of this comes under the name "Green Buildings". Wood-based construction and material solutions are a response to these trends. Investors and users are gradually starting to think more environmentally friendly and therefore many times also make decisions for wood-based constructions. There are several systems that fall into the category of so-called crushed buildings. The aim of this work is to provide a look at the "greener" options offered in the construction industry with an emphasis on their energy and thermal characteristics. The subject of the research was selected structural parts of timber-based buildings applied to model constructions by means of which selected thermal-technical characteristics were evaluated. This work points out the differences between the compared design variants of wooden buildings in terms of their ability to effectively save energy sources for heating inserted during the operation of wood-based buildings.

scholarly journals MATHEMATICAL MODEL OF HEAT SUPPLY INSTALLATION AS AN OBJECT OF ECONOMIC EFFICIENCY AND AUTOMATION

2020 ◽  
Vol 2 (2) ◽  
pp. 69-74
Author(s):  
S. HORIASHCHENKO ◽  
◽  
Yu. KRAVCHIK ◽  
O. PIDGORNYI ◽  
◽  
...  
Keyword(s):  
Mathematical Model ◽  
Solar Radiation ◽  
Solar Energy ◽  
Water Supply ◽  
Solar Collector ◽  
Heat Supply ◽  
Hot Water ◽  
Energy Sources ◽  
Solar Collectors ◽  
Efficient Operation

Solar energy is widely used in cases where the inaccessibility of other energy sources in combination with a sufficient amount of solar radiation justifies it economically. With the help of a system of solar collectors, you can significantly reduce energy costs for hot water supply and heating. In addition, the use of this system helps reduce CO2 emissions. The potential of solar energy in Ukraine is quite high. According to the climatic conditions of our region, solar activity is slightly lower than in the southern regions, so the use of flat solar collectors, which use both direct and scattered solar radiation, is effective for our region. The use of heat collectors in the home for water supply and heating of small areas is economically feasible, as it does not require significant costs. Heat supply plants using non-traditional energy sources are promising in terms of fuel savings and reduction of harmful effects on the environment. To increase the service life, economical use of heat and fuel, efficient operation of the installation requires the use of automation. The article considers the development of a mathematical model of a heat supply installation based on a solar collector. For automated control of the heat supply installation, it is necessary to know the properties of this installation as a whole and its individual elements. For this purpose, models of individual elements of the heat supply installation in a linear approximation are considered. The solar collector is conditionally divided into two parts. The model of the ground heat exchanger is developed. Also e battery models and consumer premises. The given matrices of elements of installation of heat supply are united in the uniform system of matrices. The obtained results allow estimating in advance efficiency of their use and economic attractiveness.

Russian Citizens' Representations of the Country's Position in the Geopolitical Space of the Commonwealth of Independent States, Europe, and the World

2003 ◽  
Vol 8 (4) ◽  
pp. 238-251
Author(s):  
Victor F. Petrenko ◽  
Olga V. Mitina ◽  
Kirill A. Bertnikov
Keyword(s):  
Well Being ◽  
Multidimensional Space ◽  
Commonwealth Of Independent States ◽  
Repertory Grids ◽  
Implicit Model ◽  
The World ◽  
Public Consciousness ◽  
Independent States ◽  
Invariant Factors

The aim of this research was the reconstruction of the system of categories through which Russians perceive the countries of the Commonwealth of Independent States (CIS), Europe, and the world as a whole; to study the implicit model of the geopolitical space; to analyze the stereotypes in the perception of different countries and the superposition of mental geopolitical representations onto the geographic map. The techniques of psychosemantics by Petrenko, originating in the semantic differential of Osgood and Kelly's “repertory grids,” were used as working tools. Multidimensional semantic spaces act as operational models of the structures of consciousness, and the positions of countries in multidimensional space reflect the geopolitical stereotypes of respondents about these countries. Because of the transformation of geopolitical reality representations in mass consciousness, the commonly used classification of countries as socialist, capitalist, and developing is being replaced by other structures. Four invariant factors of the countries' descriptions were identified. They are connected with Economic and Political Well-being, Military Might, Friendliness toward Russia, and Spirituality and the Level of Culture. It seems that the structure has not been explained in adequate detail and is not clearly realized by the individuals. There is an interrelationship between the democratic political structure of a country and its prosperity in the political mentality of Russian respondents. Russian public consciousness painfully strives for a new geopolitical identity and place in the commonwealth of states. It also signifies the country's interest and orientation toward the East in the search for geopolitical partners. The construct system of geopolitical perception also depends on the region of perception.

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