scholarly journals Hydrodynamics of Absorption Bubbling Apparatus

2021 ◽  
Vol 7 (11) ◽  
pp. 210-219
Keyword(s):  
Energy Saving ◽  
Absorption Efficiency ◽  
Theoretical Research ◽  
Hydrodynamic Mode ◽  
Equal Distribution ◽  
Exhaust Gases ◽  
Industrial Enterprises ◽  
Gas Consumption ◽  
Improved Design ◽  
High Absorption

The article proposes an improved design of the energy-saving, compact absorption bubbling apparatus, which cleans the particles and gas mixtures in the exhaust gases of industrial enterprises, has a high absorption efficiency. As a result of theoretical research, an equation has been proposed that calculates the value of the height of the gas cushion “h”, which provides equal distribution of purified gas to the mixing sections of the apparatus and operation in a stable hydrodynamic mode. As a result, depending on this value, it is possible to calculate the gas velocities and the gas consumption supplied to the apparatus.

TO THE QUESTION OF THE IMPACT OF CLIMATE CHANGE ON THE ECOLOGICAL STATE OF ARTIFICIAL PLANTATIONS OF PITSUNDSKAYA PINE IN THE SEASIDE AREA OF GELENDZHIK

2017 ◽  
Author(s):  
Elizaveta Derevenets ◽  
Elizaveta Derevenets
Keyword(s):  
Negative Impact ◽  
Standard Technique ◽  
Negative Influence ◽  
Exhaust Gases ◽  
The Road ◽  
Industrial Enterprises ◽  
Federal Highway ◽  
On The Road ◽  
The Impact ◽  
The City

Gelendzhik is the resort town, there aren't a lot of industrial enterprises here. The main pollutant is transport. The work purpose is the assessment of a condition of the artificial landings of a pine located along the Federal highway "Don" and landings, which is nearly the sea coast. Researches were conducted to a standard technique of the General vital state (A. S. Bogolyubov). The assessment of a condition of pines was carried out during 6 years: from 2010 to 2015. For carrying out research we used 6 experimental grounds on the Markotkhsky spine and 2 control grounds within the town. We investigated 24 trees on each platform, middle age of the trees were 30 - 40 years. Results. 1. The condition of trees in the pine forests located in immediate proximity with the Federal highway "Don" (No. 1, 2, 3) is unsatisfactory. As even weak influences of the majority of atmospheric gaseous pollutants (sulphurous gas, nitrogen oxides, etc.) give effect of a necrosis and hloroz of pine needles, the condition of pines is connected with technogenic pollution. So near the Federal highway "Don" the air environment is strongly polluted by exhaust gases. Information of 2012 confirm that negative influence of the route on Markotkh's vegetation decreases at reduction of load of the route. 2. On the sites located above on a slope (No. 4,5,6) thanks to remoteness and the wind mode intensity of influence of pollutants is lower and a condition of pines the quite satisfactory. 3. Trees on the sites located near the sea (No. 7,8) are in a good shape. Small deterioration of a state is noted in very droughty years. Conclusion. Results of six years' research show that the condition of the plantings which are in close proximity with the road worsens. It is explained by increase in intensity of the movement on the road, especially during a resort season. Gelendzhik is the city with a good ecological shape, but the damage to environment is already caused. If not to take measures, we can lose a unique part of the nature in the future, recreate it will be impossible. Measures of reduction of negative impact of exhaust gases were offered. Results of researches are transferred to ecological department of the City administration of Gelendzhik.

TO THE QUESTION OF THE IMPACT OF CLIMATE CHANGE ON THE ECOLOGICAL STATE OF ARTIFICIAL PLANTATIONS OF PITSUNDSKAYA PINE IN THE SEASIDE AREA OF GELENDZHIK

2017 ◽  
Author(s):  
Elizaveta Derevenets ◽  
Elizaveta Derevenets
Keyword(s):  
Negative Impact ◽  
Standard Technique ◽  
Negative Influence ◽  
Exhaust Gases ◽  
The Road ◽  
Industrial Enterprises ◽  
Federal Highway ◽  
On The Road ◽  
The Impact ◽  
The City

Gelendzhik is the resort town, there aren't a lot of industrial enterprises here. The main pollutant is transport. The work purpose is the assessment of a condition of the artificial landings of a pine located along the Federal highway "Don" and landings, which is nearly the sea coast. Researches were conducted to a standard technique of the General vital state (A. S. Bogolyubov). The assessment of a condition of pines was carried out during 6 years: from 2010 to 2015. For carrying out research we used 6 experimental grounds on the Markotkhsky spine and 2 control grounds within the town. We investigated 24 trees on each platform, middle age of the trees were 30 - 40 years. Results. 1. The condition of trees in the pine forests located in immediate proximity with the Federal highway "Don" (No. 1, 2, 3) is unsatisfactory. As even weak influences of the majority of atmospheric gaseous pollutants (sulphurous gas, nitrogen oxides, etc.) give effect of a necrosis and hloroz of pine needles, the condition of pines is connected with technogenic pollution. So near the Federal highway "Don" the air environment is strongly polluted by exhaust gases. Information of 2012 confirm that negative influence of the route on Markotkh's vegetation decreases at reduction of load of the route. 2. On the sites located above on a slope (No. 4,5,6) thanks to remoteness and the wind mode intensity of influence of pollutants is lower and a condition of pines the quite satisfactory. 3. Trees on the sites located near the sea (No. 7,8) are in a good shape. Small deterioration of a state is noted in very droughty years. Conclusion. Results of six years' research show that the condition of the plantings which are in close proximity with the road worsens. It is explained by increase in intensity of the movement on the road, especially during a resort season. Gelendzhik is the city with a good ecological shape, but the damage to environment is already caused. If not to take measures, we can lose a unique part of the nature in the future, recreate it will be impossible. Measures of reduction of negative impact of exhaust gases were offered. Results of researches are transferred to ecological department of the City administration of Gelendzhik.

scholarly journals Design Improvement of Cutting Part in Tunneling Shield

2021 ◽  
Vol 346 ◽  
pp. 03014
Author(s):  
Anton Letopolsky ◽  
Pavel Korchagin ◽  
Irina Teterina
Keyword(s):  
Strength Characteristics ◽  
Theoretical Research ◽  
Working Capacity ◽  
Equivalent Stresses ◽  
Rotor Design ◽  
Working Surface ◽  
Improved Design ◽  
Improved Model ◽  
Rotor Model ◽  
Tunneling Shield

The article presents a variant for improving the design of a working body of a tunneling shield, its cutting part to be more precise. The working body of the tunneling shield has been improved with the changes in the design of a rotor working surface. The theoretical studies aimed at determining the strength characteristics of the proposed rotor design have been carried out. The proposed rotor model has been visualized with the use of the T-Flex CAD software. On the basis of the results obtained in the course of the theoretical research, a comparative analysis of the strength characteristics of the main and improved model of the cutting working body of the tunneling shield have been made. The studies carried out at T-Flex CAD confirmed the working capacity of the improved design of the tunneling shield working body. The strength of the rotor has been determined as a result of the studies carried out. The maximum values of the displacement module is 2.875E-05 m, the equivalent stresses are 29.47 MPa, a reserve coefficient on equivalent stresses is 9.446E 06.

scholarly journals Energy Saving as an Important Factor in Ensuring Product Competitiveness

2021 ◽  
Vol 2 (48) ◽  
pp. 120-125
Author(s):  
O. P. Vashkiv ◽  
◽  
S. B. Smereka ◽  
Keyword(s):  
Energy Saving ◽  
Specific Energy Consumption ◽  
Environmental Standards ◽  
Manufacturing Enterprise ◽  
Research Results ◽  
Industrial Enterprises ◽  
The Face ◽  
The One ◽  
The Impact

The article is aimed at studying the features of energy saving at a manufacturing enterprise and establishing a cause-and-effect relationship between energy saving and product competitiveness. Due to analyzing and generalizing the research results of domestic and foreign scientists the views of researchers on the process of energy saving at a manufacturing enterprise are systematized; the growing role of energy saving in ensuring energy efficiency and, consequently, product competitiveness is established. The research results show that energy saving at an enterprise is one of its most important assets, the impact of which on the level of product competitiveness is becoming increasingly important in the face of the exacerbating energy and environmental crises. Energy saving, basically focusing on the intensification of production processes and use of energy and energy resources, on the one hand, reduces the level of specific energy consumption and, consequently, the price of the released product while maintaining or increasing its quality; on the other hand, it reduces the carbon loading on the environment, thus contributes to the growth of the company's image among its consumers and partners. Both components are the most important factors in ensuring product competitiveness. The development and implementation of energy saving measures at industrial enterprises, with regard to the industry-specific character of economic entities, market conditions, and the requirements of environmental standards can serve as prospects for further research

scholarly journals Criteria, Indicators, and Factors of the Sustainable Energy-Saving Economic Development: The Case of Natural Gas Consumption

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5999
Author(s):  
Olexandr Yemelyanov ◽  
Anastasiya Symak ◽  
Tetyana Petrushka ◽  
Olena Vovk ◽  
Oksana Ivanytska ◽  
...  
Keyword(s):  
Economic Development ◽  
Natural Gas ◽  
Energy Saving ◽  
Sustainable Energy ◽  
The State ◽  
Resource Saving ◽  
State Economy ◽  
Negative Effect ◽  
Gas Consumption ◽  
Natural Gas Consumption

To solve the contradiction between achieving long-term economic growth and reducing the consumption of certain types of resources, the concept of sustainable resource saving economic development must be put into practice. The purpose of this research is to establish criteria, develop indicators, and identify factors of the sustainable energy-saving economic development, as well as to test the developed theoretical provisions using the example of natural gas consumption by different countries. To achieve this goal, various methods were used, including economic and mathematical modeling, time series analysis, factor analysis, regression analysis, and so on. The criteria were formalized, according to which a certain type of economic development can be attributed to energy saving both at the level of the state economy as a whole and at the level of individual industries and enterprises. It was established that the formalized criteria of the sustainable energy-saving economic development have the form of chains of inequalities, and their application makes it possible to identify the general conditions for ensuring this type of development. The main properties of energy-saving economic development were identified. They include the pace of this development, its potential, balance, permanence, and other characteristics. Indicators that can be used to quantify these characteristics were developed. The factors influencing the scale and time characteristics of sustainable energy-saving economic development at the level of the state economy and that of industries and individual enterprises, were systematized. The dynamics of natural gas consumption in different countries was analyzed. The reasons for the lack of energy-saving natural gas economic development in some countries were identified. A quantitative assessment of the properties of this type of economic development by country was conducted. The influence of some factors on the parameters of the sustainable energy-saving natural gas economic development of countries was analyzed. The existence of a negative effect of the rebound in the consumption of natural gas was established at certain intervals in some countries. The obtained results provide an opportunity to increase the degree of understanding of the complex patterns that underlie the sustainable energy-saving economic development of states, industries, and enterprises. These results can also be used in the development of government programs to stimulate energy conservation.

Understanding intentions to reduce energy consumption at the workplace by the employees: case of a developing country

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Amna Akhound ◽  
Aseem Majeed Rizvi ◽  
Waqar Ahmed ◽  
Muhammad Nadeem Khan
Keyword(s):  
Energy Saving ◽  
Structural Equation ◽  
Energy Use ◽  
Energy Savings ◽  
Theoretical Research ◽  
Equation Modeling ◽  
Survey Method ◽  
Content Type ◽  
Saving Behavior ◽  
Save Energy

PurposeEnergy-saving behavior of individuals is essential to minimize energy use and reduce the emission of toxic gases. This study's actual focus is to find out the determinants of the energy-saving behavior of individuals in the workplace.Design/methodology/approachAs a theoretical research model, the extended theory of planned behavior (TPB) has been used to analyze the determinants of energy-saving intentions. A survey method is used to collect 289 valid data, and structural equation modeling (SEM) is used to analyze the data.FindingsThe final result shows that the variables attitude at home, subjective norm (SN) and descriptive norms positively impact intention to save energy at the workplace. In contrast, the construct attitude and perceived behavior control is insignificant in this research. On the other hand, the personal moral norm (PMN) is a powerful predictor of individual energy-saving intentions at the workplace.Originality/valueThis research provides insights that will help the organizations understand the behavior of individuals at the workplace for energy-saving intentions to formulate such policies that will enhance individuals' practice for energy savings.

High absorption efficiency and polarization-insensitivity in superconducting-nanowire single-photon detectors

2017 ◽  
Author(s):  
Luca Redaelli ◽  
Gabriele Bulgarini ◽  
Sergiy Dobrovolskiy ◽  
Sander Dorenbos ◽  
Anna Mukhtarova ◽  
...  
Keyword(s):  
Single Photon ◽  
Absorption Efficiency ◽  
Photon Detectors ◽  
Single Photon Detectors ◽  
Superconducting Nanowire ◽  
Polarization Insensitivity ◽  
High Absorption

QWIPs DESIGNED FOR HIGH ABSORPTION AND HIGH OPERATING TEMPERATURE

2002 ◽  
Vol 12 (03) ◽  
pp. 803-819 ◽  
Author(s):  
H. C. Liu ◽  
R. Dudek ◽  
A. Shen ◽  
E. Dupont ◽  
C.-Y. Song ◽  
...  
Keyword(s):  
Quantum Wells ◽  
High Speed ◽  
Room Temperature ◽  
Operating Temperature ◽  
Absorption Efficiency ◽  
Thermo Electric ◽  
Doping Density ◽  
Detection Of Weak Signals ◽  
High Absorption ◽  
Room Temperature Operation

For the majority of applications involving detection of weak signals or thermal imaging, the quantum well infrared photodetector (QWIP) is designed to have the highest possible detectivity and operating temperature. The device parameters, such as the doping density, are chosen accordingly. In a different direction, the intrinsic short carrier lifetime (~ 5 ps) makes QWIPs well suited for high speed and high frequency applications. In such cases, since lasers are normally used, a high dark current can be tolerated. The most important parameter is then the absorption efficiency. For system simplicity and potential wide use, room temperature or near room temperature (reachable by thermo-electric cooling) operations are desirable. This paper discusses the QWIP design for high absorption and elevated temperature operation, and present a systematic experimental study on a set of GaAs/AlGaAs QWIPs with different doping densities. High absorption (~ 100%) and up to room temperature operation are achieved in devices having high doping densities and 100 quantum wells.

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