Vladimir Ivanovich Velkin

Ural Federal University

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С. Е. Щеклеин

Ural Federal University

Mohammed A. Qasim

Ministry of Health

Ephraim Bonah Agyekum

Ural Federal University

Seepana Praveenkumar

Ural Federal University

Naseer T. Alwan

Northern Technical University

Abhinav Kumar

Ural Federal University

Ismail Hossain

Ural Federal University

Baseem A. Aljashaami

Ural Federal University

Sajjad A. Salih

Ural Federal University

Yang Du

Xi'an Honghui Hospital

Cooperative Institutions

Ural Federal University

Parul University

King Abdulaziz University

Northern Technical University

European University of Lefke

Russian Academy of Sciences

Applied Science Private University

University of Technology - Iraq

Lovely Professional University

Chitkara University

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INFLUENCE OF RES INTEGRATED SYSTEMS ON ENERGY SUPPLY IMPROVEMENT AND RISKS

Journal of Fundamental and Applied Sciences (2016)

Vladimir Ivanovich Velkin С. Е. Щеклеин

This paper presents the description of a RES technology cluster – an integrated system, which consists of equipment using different types of RES (renewable energy sources). It demonstrates that the stochasticity of renewable energy input influences the energy supply reliability. The work considers the influence of diversification of different RES sources on the improvement of energy supply reliability and reduction of risks connected with energy loss. Based on mathematical simulation using the convex optimization method, the authors propose a solution to determine the most effective equipment configuration of an integrated energy system – a RES cluster. Effective computer programs have been developed and registered in order to calculate the optimal integrated renewable energy system in the Russian Federation. Novelty or Significance First proposed method of convex optimization of an integrated system of energy generation is based on the renewable sources of energy. The optimization criterion is the minimal cost of generating 1kWh of electricity of the whole complex of renewable energy sources. The feature of calculating the optimal combination of renewable energy sources is based on the variance of random variables, climatic characteristics unlike average for the year. This approach improves the accuracy of calculations by 25-40%. This leads to a reduction in capital equipment costs and reducing the cost of production of 1kWh of electricity.

Energy supply

Cost reduction

10.4314/jfas.v8i2s.586

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Effect of Angle of Attack on Icing of Vertical Axis Wind Turbine Blades

Yang Du Vladimir Ivanovich Velkin Xiaoyu Chen Mohammed A. Qasim

In recent years, more attention has been paid to the research of vertical axis wind turbine blade icing, and this paper investigates the effect of angle of attack of incoming flow velocity on blade icing based on numerical simulation methods. The results show that the wind turbine has the best aerodynamic performance when the angle of attack is near 9°. The maximum icing thickness on the blade surface is positively correlated with the water collection efficiency, and the larger absolute value of the angle of attack, the larger the icing area on the blade surface.

Horizontal axis

10.1109/aced57798.2023.10143482

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Influence of RES Integrated Systems on Energy Supply Improvement and Risks

Problemy Ekorozwoju (2017)

Vladimir Ivanovich Velkin Сергей Евгеньевич Щеклеин

Energy supply

Cost reduction

Energy accounting

Source

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Citations (3)

Design and Construction of a Novel Simple and Low-Cost Test Bench Point-Absorber Wave Energy Converter Emulator System

Inventions (2021)

Ephraim Bonah Agyekum Seepana Praveenkumar Aleksei Eliseev Vladimir Ivanovich Velkin

This paper proposed a test bench device to emulate or simulate the electrical impulses of a wave energy converter (WEC). The objective of the study is to reconstruct under laboratory conditions the dynamics of a WEC in the form of an emulator to assess the performance, which, in this case, is the output power. The designed emulator device is programmable, which makes it possible to create under laboratory conditions the operating mode of the wave generator, identical to how the wave generator would work under real sea conditions. Any control algorithm can be executed in the designed emulator. In order to test the performance of the constructed WEC emulator, an experiment was conducted to test its power output against that of a real point-absorber WEC. The results indicate that, although the power output for that of the real WEC was higher than the WEC emulator, the emulator performed perfectly well. The relatively low power output of the emulator was because of the type of algorithm that was written for the emulator, therefore increasing the speed of the motor in the algorithm (code) would result in higher output for the proposed WEC emulator.

Test bench

10.3390/inventions6010020

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Citations (21)

Towards a reduction of emissions and cost-savings in homes: Techno-economic and environmental impact of two different solar water heaters

Energy Reports (2024)

Ephraim Bonah Agyekum Jeffrey Dankwa Ampah Tahir Ali Khan Nimay Chandra Giri Abdelazim G. Hussien

South Africa currently has the highest carbon emission intensity per kilowatt of electricity generation globally, and its government intends to reduce it. Some of the measures taken by the government include a reduction of emissions in the building sector using solar water heating (SWH) systems. However, there is currently no study in the country that comprehensively assesses the technical, economic, and environmental impact of SWH systems across the country. This study therefore used the System Advisor Model (SAM) to model two different technologies of SWH systems (i.e., flat plate (FPC) and evacuated tube (EPC) SWH) at five different locations (i.e., Pretoria, Upington, Kimberley, Durban, and Cape Town) strategically selected across the country. According to the study, the optimum azimuth for both the evacuated tube and flat plate SWH system in South Africa is 0°. Installing FPC and EPC at the different locations would yield payback periods of 3.2 to 4.4 years and 3.5 to 4.3 years, respectively. Comparably, levelized cost of energy for the FPC and EPC will range from 7.47 to 9.62 cents/kWh and 7.66 to 9.24 cents/kWh, respectively, based on where the SWH system is located. Depending on where the facility is located, the annual cost savings for the FPC system would be between $486 and $625, while the EPC system would save between $529 and $638. Using SWHs can reduce CO2 emissions by 75–77% for the evacuated tube system and 69–76% for the flat plate system annually, depending on the location.

Payback period

Solar water heating

Unit cost

10.1016/j.egyr.2023.12.063

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Citations (12)

Experimental study on hybridization of a PV–TEG system for electrical performance enhancement using heat exchangers, energy, exergy and economic levelized cost of energy (LCOE) analysis

Clean Energy (2023)

Mohammed A. Qasim Vladimir Ivanovich Velkin С. Е. Щеклеин

Abstract The concept of employing thermoelectric generators (TEGs) to recover energy from waste heat has gained popularity, with applications that range from milliwatt to kilowatt levels of output power. In this study, a hybrid photovoltaic panel and thermoelectric generator (HPVTEG) system consisting of an integrated heat exchanger, a commercial polycrystalline silicon photovoltaic (PV) panel and a commercial bismuth telluride TEG was proposed. Here, TE components can be used to cool PV modules, increasing their output power via the Seebeck effect. The main finding is that the hybrid system has a reduced average temperature of 16.01°C. The average power of the stand-alone PV panel is 28.06 W, but that of the HPVTEG system is 32.76 W, which is an increase of 4.7 W. The conversion efficiency and power of the hybrid system increased by 16.7% and 16.4%, respectively, compared with a stand-alone PV panel. The HPVTEG system achieved an average exergy efficiency of 12.79% compared with 10.98% for a stand-alone PV panel. According to the calculation results, the levelized cost of energy (LCOE) of the stand-alone PV panel can range from 0.06741 to 0.10251 US$/kWh depending on how many days it is in operation, while the LCOE of the HPVTEG system can range from 0.06681 to 0.10160 US$/kWh.

Exergy efficiency

Thermoelectric generator

10.1093/ce/zkad023

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Citations (10)

Alternating current losses in superconducting circular/stacked coils used in energy storage systems

Journal of Energy Storage (2021)

Abhinav Kumar Seepana Praveenkumar Ashish Agrawal Vladimir Ivanovich Velkin

Homogenization

10.1016/j.est.2021.103721

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Citations (8)

Research efficiency of complex systems with spread spectrum renewable energy for electric power supply decentralized objects in Russia

WIT transactions on ecology and the environment (2014)

Vladimir Ivanovich Velkin

The urgency of using the integrated systems of renewable energy sources (RES clusters) within the significant area of the Russian Federation is demonstrated.The theoretical background of the methodology of cluster approach and substantiation of calculation of the optimal composition of the equipment of renewable energy sources within a RES cluster are presented.The analogy between the RES clusters and the Markowitz-Sharpe-Tobin portfolio theory is shown.The graphical model for searching for the optimal RES cluster and the algorithm of computation program are presented.The results of using various RES clusters for an experimental object "An Energy Efficient House" are considered.The resulting computed data and the experimental data demonstrate that the energy performance of optimized integrated systems (RES clusters) can be increased by up to 20-40% in terms of energy generation.The comparative performance of the existing RES cluster imported from China and the one optimized using the proposed methodology and the elaborated algorithm is shown.

Energy supply

10.2495/eq140421

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Citations (6)

A New Maximum Power Point Tracking Technique for Thermoelectric Generator Modules

Inventions (2021)

Mohammed A. Qasim Naseer T. Alwan Seepana Praveenkumar Vladimir Ivanovich Velkin Ephraim Bonah Agyekum

Thermoelectric generators (TEGs) are devices that convert heat into electricity. This paper is about the design of a Maximum Power Point Tracking (MPPT) technique for a TEG module. The module is built using 204 TEGs connected in series. It is connected to the load through a DC/DC boost converter. The MPPT technique used in this work is the Interval Type 2 Fuzzy Logic Controller (IT2FLC). To verify its performance, the IT2FLC is compared with a traditional Perturb and Observe (P&O) MPPT algorithm in the case of power and voltage response at steady state, load switching, and through various ranges of temperature differences (ΔT). The TEG module is modeled and the whole system is simulated successfully using MATLAB SIMULINK R2017a.

Thermoelectric generator

Maximum power principle

10.3390/inventions6040088

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Citations (28)

Comparative evaluation of renewable energy scenario in Ghana

IOP Conference Series Materials Science and Engineering (2019)

Ephraim Bonah Agyekum Vladimir Ivanovich Velkin Ismail Hossain

Abstract Availability of cheap, reliable and safe energy is very essential to the growth and development of every nation. This paper assesses solar radiation and wind speed at one site each in the southern, middle-belt and northern part of Ghana to estimate the potential of integrating solar and wind energy into the country’s energy mix. The analysis included the financial viability of a possible 2.5 MW installed solar power plant in Gomoa, Kintampo and Navrongo. The RETScreen software was used for the feasibility and financial viability evaluation. The study found out that the southern part of the country experiences the least solar irradiation as it recorded 4.73 kWh/m2/day, the middle belt recorded 5.28 kWh/m2/day, the northern belt however recorded the highest level of solar irradiation of 6.07 kWh/m2/day. It was also found out from the research that the southern belt has the highest annual average wind speed of 2.8 m/s followed by the northern sector with 2.3 m/s and the least was recorded in the middle-belt with an average wind speed of 2.2 m/s. The financial indicators like the internal rate return, equity payback years, cumulative cash flows and simple profitability index all indicated that the northern sector is the best site for the development of solar energy although the other parts of the country are also positive. The impact of the development of these plants will also have a considerable impact on the environment since the research shows some 93% reduction in the emission of greenhouse gases (GHG).

Payback period

10.1088/1757-899x/643/1/012157

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Citations (10)