Velocity and turbulence affected by various vegetations in open channel

Water energy is a conventional source of source that is widely available in nature. It can be easily converted into high quality secondary energy-electric energy through hydroelectric power stations. Hydropower is not only a widely used conventional energy source, but also a renewable energy source. Moreover, hydroelectric power has no pollution to the environment. Therefore, water energy is an inexhaustible and high-quality energy source among many energy sources in the world. However, vegetation can change flow structure and turbulence characteristics, impacting the use of water energy. In previous researches, few studies have focused on the comparison of velocity and turbulence influenced by various vegetations. Therefore, laboratory experiments were carried out to investigate hydrodynamics affected by submerged rigid vegetation (reed and wooden stick) and merged flexible vegetation (grass and chlorella) under different conditions. The time-averaged velocity distributions of planted floodplain are not logarithmic. Instead, reed and wooden stick followed an “S-shape” profile, but for grass and chlorella, they presented reverse S-shape profile. For all cases, turbulence is not isotropic and the change law of turbulence intensity is different in different sections.

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Artificial neural networks for temporal processing applied to prediction of electric energy in small hydroelectric power stations

Proceedings. 2005 IEEE International Joint Conference on Neural Networks, 2005. ◽

10.1109/ijcnn.2005.1556317 ◽

2006 ◽

Author(s):

P.C.E. Joaquim ◽

J.L.G. Rosa

Keyword(s):

Neural Networks ◽

Artificial Neural Networks ◽

Temporal Processing ◽

Electric Energy ◽

Hydroelectric Power ◽

Power Stations ◽

Artificial Neural

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Independent electrical power supply of river bridges and objects adjacent to them

Proceedings of Petersburg Transport University ◽

10.20295/1815-588x-2018-4-545-550 ◽

2019 ◽

pp. 545-550

Author(s):

Konstantin Kim ◽

Mikhail Gerasimov ◽

Aleksandr Smirnov

Keyword(s):

Traffic Safety ◽

Power Supply ◽

Electrical Power ◽

Practical Importance ◽

Electric Energy ◽

Cost Effective ◽

Electric Transport ◽

Hydroelectric Power ◽

Power Stations ◽

Traction Network

Objective: To improve trafﬁc safety, reduce the environmental impact and to save electricity by using the energy of river ﬂows to supply river bridges with power. Methods: A renewable and quite cost- effective source of electric energy can be obtained by using small hydroelectric power stations (GES). A project on installation of small submersible GES on the bridge footings over the Neva River in Saint Petersburg is described in the given article. Results: The powers of hydraulic turbines for each bridge were calculated based on their energy consumption and the number of possible turbine installation places. Practical importance: It is supposed to give generated electric power to the traction network of electric transport or to accumulate it in storages providing power supply of a nearby infrastructure at any time. In addition, strengthening of the present distribution network within the city by means of the additional sources of electricity will be provided.

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Turbulent Kinetic Energy and Budget of Heterogeneous Open Channel with Gravel and Vegetated Beds

10.47363/jcert/2021(3)115 ◽

2021 ◽

Vol 3 (2) ◽

pp. 1-4

Author(s):

OP Folorunso ◽

Keyword(s):

Kinetic Energy ◽

Turbulent Kinetic Energy ◽

Open Channel ◽

Open Channel Flow ◽

Hydraulic Parameters ◽

Flow Depth ◽

Turbulent Kinetic Energy Budget ◽

Rigid Vegetation ◽

Flexible Vegetation ◽

Turbulence Production

Turbulent kinetic energy (TKE) and budget are indispensable hydraulic parameters to determine turbulent scales and processes resulting from various and different natural hydraulic features in open channels. This paper focuses on experimental investigation of turbulent kinetic energy and budget in a heterogeneous open channel flow with gravel and vegetated beds. Results indicate the turbulent kinetic energy (TKE) value over gravel region of the heterogeneous bed remains approximately constant with flow depth. The highest turbulent kinetic energy was calculated for flexible vegetation arrangement compared to the rigid vegetation. The estimation of the turbulent kinetic energy budget shows the higher values of turbulence production recorded over the flexible vegetated bed, consequently, the dissipation rate exhibits faster decay of turbulence kinetic energy over the vegetated bed in comparison to the gravel bed.

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MANAGEMENT FACILITIES BY GENERATION AND CONSUMPTION OF ELECTRIC ENERGY IN ELECTROENERGY SYSTEMS WITH THE UP-DIFFUSED GENERATION TAKING INTO ACCOUNT FACTOR OF VAGUENESS OF WEATHER AND CLIMATIC TERMS

Bulletin of the National Technical University "KhPI". Series: Energy: Reliability and Energy Efficiency ◽

10.20998/2224-0349.2020.01.14 ◽

2020 ◽

pp. 95-99

Author(s):

А. Cherniuk ◽

І. Kirisov ◽

Ye. Kachanov

Keyword(s):

Electric Power ◽

Wind Power ◽

Power Supply ◽

Technical Problem ◽

Electric Energy ◽

Hydroelectric Power ◽

Power Station ◽

Power Stations ◽

Characteristic Modes

The analysis of process of generation, transmission, distribution and consumption of electric energy is conducted in the electroenergy systems with the up‑diffused generation. The features of the characteristic modes of operations of objects of the up‑diffused generation and their influence are considered on reliability of power supply and quality of electric energy indexes for consumers. Certainly, that the process of generation of electric energy the sources of the up‑diffused generation and process of consumption of electric energy largely depend on weather and climatic terms and is characterized the substantial level of vagueness that negatively influences on drafting of balance of mine‑out and consumed electric energy. It is certain that possible not‑balance in the process of power supply of consumers substantially worsens the indexes of quality of electric energy in a network. It is indicated on actuality of this scientific and technical problem and possible methods and backer‑ups of reliability of power supply and quality of electric energy indexes are certain in networks with the up-diffused generation. Influence of weather terms is analysed on the process of generation of electric energy and climatic terms sunny and wind power-stations on the process of generation of electric energy small and the hydroelectric power and power-stations that work as on the basis of biogas technologies and organic proceeded in primary fuel. The features of generation of electric power the indicated types of power station and possible prognosis indexes that will influence on the process of management these objects of the up‑diffused generation are certain. Facilities and management backlogs are certain by a generation and consumption of electric energy in electroenergy networks with the up‑diffused generation. General conception of choice and development of management facilities offers by the process of power supply in the systems with the up‑diffused generation that takes into account the factors of considerable vagueness of entry parameters and based on the theory of construction of the reliable systems from unreliable elements.

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