scholarly journals PALAEOLITHIC IN D. YA. TELEHIN’S RESEARCH

2020 ◽  
Vol 37 (4) ◽  
pp. 24-31
Author(s):  
V. M. Stepanchuk

The article is devoted to the coverage of a little-known aspect of D. Ya. Telehin’s scientific activity, namely his research related to Palaeolithic sites and Palaeolithic issues. Although this was clearly not the main area of the scientist’s concern, his interest for Palaeolithic studies has accompanied him throughout his scientific life. In the early 1950s, D. Ya. Telehin participated in the works of I. F. Levytskyi at the site Mynivskyi Yar at Seversky Donets, in eastern Ukraine. The lower layer of the site belongs to the period 18—13 thousand years ago. In fact, at the time of excavations, it was the only Upper Palaeolithic site in the region that was investigated on a relatively large area. In the mid-twentieth century, a cascade of new hydroelectric power plants and reservoirs was being built on the Dnieper. During the field seasons of 1953 and 1957, D. Ya. Telehin’s explorations in the area of construction of the Kakhovskaya hydroelectric power plant and the Kakhovskoye reservoir discovered, in addition to numerous sites from later periods, the first upper Palaeolithic locations of the Lower Dnieper, namely: Shyroka, Valivalska and Merzlyakova gullies. In 1975 together with N. I. Tarasenko, D. Ya. Telegin conducts excavations at the Rogalyk farm. According to modern interpretation, the remains of three new stratified sites were discovered during these works. The authors have identified the materials as early Mesolithic; they are now attributed to the final Palaeolithic. In 1976 D. Ya. Telehin researches the Upper Palaeolithic site of Zbranky near the eponymous village in the Ovruch loess area. The materials found once again, after the works of I. F. Levytskyi and V. A. Mesyats, confirmed that this region was actively exploited by the Palaeolithic man at the end of the Pleistocene. A number of new, mostly surface, Upper Palaeolithic sites were discovered by the «Dnieper-Donbas» and «Slavutych» expeditions led by D. Ya. Telehin in 1970—74 and 1980—83 on the territory of the Middle Dnieper Basin (Chernyavshchyna, Pereschepyno, Khizhnyakivka, etc.) and the middle reaches of Southern Buh (Apolyanka, Berezyno). During the 1980s, D. Ya. Telehin investigated the area of the left bank of the Dnieper River near the mouth of the Sula River. This work resulted in the discovery of a new concentration of Upper Palaeolithic sites. The features of lithic assemblages make it possible to identify groups of later and earlier sites in the preliminary view, including the so-called archaic Upper Palaeolithic. In 1984, D. Ya. Telehin investigated the location of Semenivka 1 in Baryshevsky district of Kiev region in the valley of Trubizh river. The peculiarities of the stone tools allowed to see the nearest analogies to the findings in the materials of the sites of Epigravettian mammoth hunters. Studies at Semenivka 1 gave an impulse for further searches in this area. The brief overview offered shows that although Palaeolithic studies were not in the focus of D. Ya. Telehin’s attention, his works are nevertheless deservedly included in the general fund for achievements in domestic Palaeolithic studies.

2015 ◽  
Vol 806 ◽  
pp. 64-73
Author(s):  
Aleksandar Vujović ◽  
Zdravko Krivokapić ◽  
Jelena Jovanović

The paper is a result of research at the Mechanical Engineering Faculty in Podgorica and represents the aspiration of authors to combine scientific and technical experience in order to achieve improvement in a real system. It is a complex system of lock chambers in a hydroelectric power plant. Based on a detailed analysis of the initial state, through the process modeling of complex real system, the authors identify possible areas where the intervening and applying modern systems with greater flexibility is necessary to achieve higher levels of automation. Also, proposed in the paper are measures for ensuring the security of information that rise system performance to a higher level compared to the competition and create an advantage in the global market.


Author(s):  
Washington Orlando Irrazabal Bohorquez ◽  
Joa˜o Roberto Barbosa

In the Ecuadorian electrical market, several sugar plants, which significantly participate in the local electricity market, are producing their own energy and commercializing the surplus to the electrical market. This study evaluates the integral use of the sugar cane bagasse for productive process on a Cogeneration Power Plant in an Ecuadorian Sugar Company [8]. The electrical generation based on biomass requires a great initial investment. The cost is around US$ 800/kW installed, twice the US$ 400/kW initial investment of conventional thermoelectric power plant and almost equal to the US$ 1,000/kW initial cost of hydroelectric power plant [5]. A thermoeconomic study was carried out on the production of electricity and the sales of the surplus of 27 MWe average produced by the power plant. An operational analysis was made using instantaneous values from the estimated curves of demand and generation of electricity. From the results, it was concluded that the generated electricity costs are 0.0443 US$/kWh, while the costs of the electricity from Fossil Power Plants (burning fuel oil, diesel fuel and natural gas) are in the range 0.03–0.15 US$/kWh and from Hydroelectric Plants are about 0.02 US$/kWh. Cogeneration power plants burning sugar cane bagasse could contribute to the mitigation of climatic change. This specific case study shows the reduction of the prospective emissions of greenhouse gases, around 55,188 ton of CO2 equivalent yearly for this cogeneration power plant.


2011 ◽  
Vol 3 (2) ◽  
pp. 171-186 ◽  
Author(s):  
Weddy Bernadi Sudirman ◽  
Sarwono Hardjomuljadi

The development of hydroelectric power plant is one of the efforts in utilising water resources for people’s welfare by generating the energy for electricity purpose. Nowadays, the installed capacity of hydro electric power plants is 3,529 MW from the total installed capacity 24,846 MW from various power plants owned by PT PLN (Persero) and the hydropower potential 75,000 MW all over Indonesia. Hydroelectric power plant has complex structures and involves large amounts of capital with a long-running construction period. This situation imposes uncertainty factors with considerably high risks. The construction phase is identified as a critical phase in hydropower projects where many unforeseen factors occur. Failure to manage project risks leads to significant problems for the client such as completion time delays and cost overruns. In order to prevent time delays and cost overruns in hydropower construction in PT PLN (Persero), the study on project risk management in the construction stage of hydropower plant projects had been conducted. The purpose of this study was to identify and measure the importance of construction risks and to determine the level of agreement or disagreement between the client, consultants and contractors on the ranking of construction risk in hydropower projects. The author selected the respondents from the clients, consultants and contractors’ personnel who had work experience in hydropower construction projects in PT PLN (Persero). JEL Classification: L74—Construction


2019 ◽  
Vol 114 ◽  
pp. 01006
Author(s):  
Gleb Mayorov ◽  
Valery Stennikov ◽  
Eugene Barakhtenko

The current technological infrastructure in the electricity, heat, cold, and gas supply, as a rule, is formed and controlled separately by local systems and tasks. The traditionally considered energy systems unite large energy sources, such as hydroelectric power station, combined heat and power plants, boiler plants, and electric and pipeline networks distributed over a large area. New trends in the energy sector necessitate a revision of the principles of construction of energy systems and the creation of integrated energy supply systems. Combining separate different types of systems of different levels into a single integrated system with many coordinated elements can contribute to the implementation of new functionality, the use of more advanced technologies in operation and the active participation of consumers with distributed generation in the energy supply process. For the study of integrated energy supply systems it is proposed to use a multiagent approach, which is one of the promising areas of research for complex systems. This approach is used in many subject areas to study systems that include many elements with complex behavior. Such systems include integrated energy supply systems. The solution of the problem on the basis of the agent approach is developed by a multitude of interrelated agents.


2010 ◽  
Vol 62 (1) ◽  
pp. 99-105 ◽  
Author(s):  
Emre Alp ◽  
Ülkü Yetiş

Hydroelectric power plants and dams often play an important role in developing countries in terms of their contribution to economy. In accordance with the energy policies of Turkish Republic, Yusufeli Dam and Hydroelectric Power Plant in Northeastern Turkey have been initiated. In this study, the Contingent Valuation Method (CVM) was conducted in Yusufeli Village to determine the environmental costs of the Yusufeli Project. The purpose is to assess the willingness to pay (WTP) of Yusufeli Village residents for restoration of the environmental impacts of the dam project and also to investigate the underlying economic, psychological, and social motivations for WTP. WTP was calculated as US$761 per person which can further be used in the cost–benefit analysis. The results from the study suggest that application of the CVM in rural and urban areas located in the same region can show differences.


2019 ◽  
Vol 484 (2) ◽  
pp. 156-160
Author(s):  
V. V. Klimenko ◽  
E. V. Fedotova

The influence of the climate change in Russia on the operation of hydroelectric power plants during the 21st century is considered. For obtaining quantitative assessments, the results yielded by global climatic models for river runoff were subjected to ensemble averaging. In addition to the standard RCP climatic scenarios, the MPEI scenario is considered, the fundamental distinctive feature of which is that the most likely development trajectories are selected. It is found that the choice of a scenario has an essential effect on both the qualitative pattern of river runoff changes over the territory and on the quantitative characteristics of this process.An integral assessment for the change in the hydroelectric power plant outputs due to climate change is made.


Author(s):  
Ottentri Ottentri ◽  
Hendi Matalata

The need for electrical energy is a necessity that can not be ditawar–tawar anymore for a life worthy of every person in this day. Generally, remote rural areas located in mountainous areas have a large potential of water energy, so that the hydroelectric power plant is one of the energy sources that can be developed. Jambi is an area covered with Batanghari River flows. This research aims to know how the work process of Microhydro power plant.  Components of the essential components of miniature microhydro power plants are reservoirs, rapid pipes, turbines, generators where these components are not loose bias, interrelated to one another. Round of Tubin obtained from the experiment is 400 rpm with water discharge 0.0016 m3/s. The maximum voltage generated by the generator is 18 volts. Voltage generated from the generator to charging the Batrai used inverter of 13.1 volts. The load will remain on even though the main energy source is the generator stop in the same, because the energy of the second is Batrai.


2021 ◽  
Vol 2131 (3) ◽  
pp. 032071
Author(s):  
A A Devyatkin ◽  
S V Titov ◽  
V V Konovalov

Abstract Comparative analysis of methods of obtaining electricity from a renewable energy source is carried out. Various designs and op-tions for small hydroelectric power plants have been proposed. Positive and negative factors of structures under consideration and their impact on the environment are analyzed. The main characteristics of the flow (speed, head) for the choice of the optimal variant of hydroelectric power plant have been determined. Three variants of impellers for free-flow hydroelectric power plants are proposed with a comparison of the efficien-cy of each variant. An analysis was carried out and an impeller based on a Darrieus rotor was selected for further research. Simulation was performed in the Flow Simulation program. The initial data for the design of Darrieus rotor operating in a liquid were the diameter and width of the impeller. The calculations involved a rotor with straight and swirling blades. The swirling blades rotor is self-starting. In the course of the calcula-tion, the speed of the liquid flow approaching the rotor and the rotor speed were changed. As a result of cal-culation, the value of the positive moment for self-starting was determined, which occurs at an incident flow velocity of at least 1.3 m/s.


Author(s):  
M. I. Balzannikov ◽  
E. G. Vyshkin

The paper presents the analysis of different types of impact the hydroelectric power plants’ reservoirs could make on the environment. Hydroelectric power plants (HPP) produce ecologically safe energy and correspond to the modern striving for sustainability because they are operated on renewable energy sources. At the same time they can provoke various potential dangers for the environment. The objective of the investigation is to demonstrate the interrelation between the type and structure of a hydroelectric power plant and the way its reservoir may impact on the nature surrounding the plant. These effects may be direct and indirect, positive and negative and vary from insignificant that can be easily fixed to those that are irreversible and catastrophic. The latter should be taken into account during the design of HPP.


Author(s):  
Mikhail Balzannikov

The article describes run-of-the-river hydroelectric power plants. The authors specify the importance of performing technical and economic calculations in justifying the large-sized units of the water-supplying channel of a run-of-the-river hydroelectric power plant: turbine pits and suction (discharge) pipes. The study shows that the amount of construction work and the total cost of building a hydroelectric power plant depend on the size of these water supply units. The research objective is to analyze the validity of establishing the main dimensions of the suction pipes for modern technical and economic conditions. The researchers use the discounted income method. The calculations are performed for a hydroelectric power plant with an elbow suction pipe. The analysis of how the operating conditions of a hydroelectric power plant influence the savings of construction resources is carried out. The analysis shows that saving construction resources by reducing the length of the suction pipe is justified if the hydroelectric power plamt is designed to work only at peak power loads. For hydroelectric power plants operating at semi-peak or base power loads, the additional construction costs would be appropriate if leading to the decrease in pressure loss and to the increase in electricity generation.


Sign in / Sign up

Export Citation Format

Share Document