Methodological foundations of innovative solutions in renewable energy engineering

Рассмотрен подход, позволяющий методами системного анализа исследовать энергетическую систему с возобновляемыми источниками энергии. Предлагается использовать возможности методов многокритериальной оптимизации, анализа и принятия решений при разработке системы моделей поступления и потенциала возобновляемых источников энергии, позволяющей учитывать особенности технологии преобразования энергии. We deal with the approach that makes it possible to investigate the energy system with renewable energy sources (RES) by methods of system analysis. We propose to use multi-criterion optimization, analysis and decision-making techniques in the development of a system of input and potential models for renewable energy sources that took into account the characteristics of energy conversion technology.

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Development of expert assessment methods in planning energy supply of buildings with renewable energy sources

Technology audit and production reserves ◽

10.15587/2706-5448.2021.230230 ◽

2021 ◽

Vol 2 (2(58)) ◽

pp. 51-54

Author(s):

Olha Boiko ◽

Vira Shendryk ◽

Yuliia Parfenenko ◽

Petr Pavlenko ◽

Yevhenii Kholiavka

Keyword(s):

Decision Making ◽

Information System ◽

Renewable Energy ◽

Power System ◽

Energy Supply ◽

System Analysis ◽

Renewable Energy Sources ◽

Energy System ◽

Energy Sources ◽

Expert Evaluation

The object of research is the process of expert evaluation in planning the energy supply of buildings using renewable energy sources. The conducted research is based on the application of system analysis methods to formalize the process of expert evaluation in the planning of an energy system with renewable energy sources. Here were used methods of expert evaluation of characteristics of qualitative criteria, methods of the theory of fuzzy sets and fuzzy logic for the formation of the value of criteria, and methods of estimating the reliability of the expert evaluation. Methods of structural analysis and functional modelling of information systems are used to build structural and functional models of the expert evaluation process. The issue of creating an appropriate information system for planning a power system with renewable energy sources is considered. One of the components of the information system is the unit for evaluating candidate experts. A six-level algorithm of the hierarchical structure of expert selection is proposed. As a result of the algorithm, an expert group is formed. This paper shows the process of narrowing the circle of experts from twenty to three candidates. The list of criteria influencing the choice of experts is formed: length of service, availability of the certificate, the efficiency of decision-making, education. The process of assessing the stability of experts' opinions is shown. It is proposed to use the method of processing the opinions of experts to find the value of the membership functions of qualitative criteria. As a result of the study, a group of three experts was formed, whose opinions are taken into account when choosing alternatives to the energy system. In accordance with the proposed information technology of energy supply planning of buildings using renewable energy sources, an information system in the form of a web-oriented application is proposed. A separate part of the information system is a subsystem for working with experts. The diagram of sequence of actions of the expert and the interface of work with system is developed. The use of the information system allowed to increase the efficiency of questionnaires of experts and decision-making on the choice of the optimal structure of the power system as a whole.

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Moving Toward a Sustainable Energy System: A Case Study of Viken County of Norway

Energies ◽

10.3390/en13225912 ◽

2020 ◽

Vol 13 (22) ◽

pp. 5912

Author(s):

Fredrik Ege Abrahamsen ◽

Sturla Grina Ruud ◽

Alemayehu Gebremedhin

Keyword(s):

Renewable Energy ◽

System Analysis ◽

Renewable Energy Sources ◽

Energy System ◽

Transport Sector ◽

Energy Sources ◽

Analysis Tool ◽

Future Scenarios ◽

Solar Pv ◽

The Future

Increasing awareness of climate issues and environmental policy has been a key factor behind the continuous transition of energy systems at different levels. This paper aimed to analyse the energy system of Viken county, located in Norway. An energy system model using the energy system analysis tool EnergyPLAN was developed. Based on the reference year 2018, two future scenarios which focus on changes in the transport sector for the year 2030 and 2050 were designed. Besides changes in the transport sector, the integration of renewable energy sources is considered in the future scenarios. The results of the analysis regarding the future scenario shows substantial CO2 reduction as a result of energy-carrier switching within the transport sector. The integration of new energy sources, in this case, solar PV and wind power, helps to offset increased import dependency. The primary energy supply decrease and the share of renewable energy increases significantly.

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The Energy System of an Ecovillage: Barriers and Enablers

Land ◽

10.3390/land10070682 ◽

2021 ◽

Vol 10 (7) ◽

pp. 682

Author(s):

Zita Szabó ◽

Viola Prohászka ◽

Ágnes Sallay

Keyword(s):

Renewable Energy ◽

Spatial Structure ◽

Energy Management ◽

Energy Production ◽

Renewable Energy Sources ◽

Energy System ◽

Energy Sources ◽

Energy Management System ◽

Production And Consumption ◽

Ecologically Sustainable

Nowadays, in the context of climate change, efficient energy management and increasing the share of renewable energy sources in the energy mix are helping to reduce greenhouse gases. In this research, we present the energy system and its management and the possibilities of its development through the example of an ecovillage. The basic goal of such a community is to be economically, socially, and ecologically sustainable, so the study of energy system of an ecovillage is especially justified. As the goal of this community is sustainability, potential technological and efficiency barriers to the use of renewable energy sources will also become visible. Our sample area is Visnyeszéplak ecovillage, where we examined the energy production and consumption habits and possibilities of the community with the help of interviews, literature, and map databases. By examining the spatial structure of the settlement, we examined the spatial structure of energy management. We formulated development proposals that can make the community’s energy management system more efficient.

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Renewable energy sources in future energy balance of the republic of Kazakhstan

E3S Web of Conferences ◽

10.1051/e3sconf/20185803006 ◽

2018 ◽

Vol 58 ◽

pp. 03006 ◽

Cited By ~ 1

Author(s):

Bekzhan Mukatov ◽

Ravil Khabibullin

Keyword(s):

Renewable Energy ◽

Development Strategy ◽

Large Scale ◽

Renewable Energy Sources ◽

Energy System ◽

Energy Sources ◽

Basic Principles ◽

The World ◽

Main Factors ◽

The Republic

The article describes the main factors determining the development of renewable energy sources in the world. The assessment of the applicability of foreign RES development strategies to Kazakhstan’s energy system has been made. The main tasks facing Kazakhstan’s energy system with large-scale implementation of renewable energy were formulated. On the basis of the analysis and performed calculations recommendations and basic principles have been made on development strategy of renewable energy sources in the Republic of Kazakhstan.

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Multi-Criteria Decision-Making (MCDM) for the Assessment of Renewable Energy Technologies in a Household: A Review

Energies ◽

10.3390/en13051164 ◽

2020 ◽

Vol 13 (5) ◽

pp. 1164 ◽

Cited By ~ 9

Author(s):

Indre Siksnelyte-Butkiene ◽

Edmundas Kazimieras Zavadskas ◽

Dalia Streimikiene

Keyword(s):

Decision Making ◽

Renewable Energy ◽

Scientific Literature ◽

Renewable Energy Sources ◽

Multiple Criteria Decision Making ◽

Energy Sources ◽

Renewable Energy Technologies ◽

Advantages And Disadvantages ◽

Energy Technologies ◽

Depth Analysis

Different power generation technologies have different advantages and disadvantages. However, if compared to traditional energy sources, renewable energy sources provide a possibility to solve the climate change and economic decarbonization issues that are so relevant today. Therefore, the analysis and evaluation of renewable energy technologies has been receiving increasing attention in the politics of different countries and the scientific literature. The household sector consumes almost one third of all energy produced, thus studies on the evaluation of renewable energy production technologies in households are very important. This article reviews the scientific literature that have used multiple-criteria decision-making (MCDM) methods as a key tool to evaluate renewable energy technologies in households. The findings of the conducted research are categorized according to the objectives pursued and the criteria on which the evaluation was based are discussed. The article also provides an overview and in-depth analysis of MCDM methods and distinguishes the main advantages and disadvantages of using them to evaluate technologies in households.

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Analysis of Three Port Full Bridge and Half Bridge DC-DC Converter Interfacing Renewable Energy System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.768.3 ◽

2013 ◽

Vol 768 ◽

pp. 3-8 ◽

Cited By ~ 1

Author(s):

M. Venmathi ◽

R. Ramaprabha

Keyword(s):

Renewable Energy ◽

Power Flow ◽

Pulse Width Modulation ◽

Renewable Energy Sources ◽

Energy System ◽

Energy Sources ◽

Energy Storage Devices ◽

Storage Devices ◽

Conversion Stage ◽

Bidirectional Power Flow

This paper presents the comparative dynamic analysis of full bridge and half bridge three port dc-dc converter topology interfacing the renewable energy sources along with the energy storage devices. The three port converter comprises the active bridge circuit and the three winding transformer. It uses single power conversion stage with high frequency link to control power flow between the batteries, load and the renewable energy sources. The power flow between the ports is controlled by phase shifting the square wave outputs of the active bridges in combination with pulse width modulation (PWM) technique. The analysis reveals that the battery discharges when the source is not sufficient to supply the load and it was charged when the source alone is capable of supplying the load. Hence there is a bidirectional power flow in the storage port when there is a transition in the source.

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Renewable energy sources generation forecasting in aggregated energy system level

10.1109/eeeic/icpseurope51590.2021.9584682 ◽

2021 ◽

Author(s):

Ioannis Panapakidis ◽

Georgios Gousis ◽

Nikolaos Koltsaklis ◽

Athanasios Dagoumas

Keyword(s):

Renewable Energy ◽

Renewable Energy Sources ◽

Energy System ◽

System Level ◽

Energy Sources

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Optimal Municipal Energy System Design and Operation Using Cumulative Exergy Consumption Minimisation

Energies ◽

10.3390/en13010182 ◽

2020 ◽

Vol 13 (1) ◽

pp. 182 ◽

Cited By ~ 1

Author(s):

Lukas Kriechbaum ◽

Thomas Kienberger

Keyword(s):

Renewable Energy ◽

System Design ◽

Power Plants ◽

Renewable Energy Sources ◽

Energy System ◽

Developed Countries ◽

Raw Material ◽

Energy Sources ◽

Variable Renewable Energy Sources ◽

Exergy Consumption

In developed countries like Austria the renewable energy potential might outpace the demand. This requires primary energy efficiency measures as well as an energy system design that enables the integration of variable renewable energy sources. Municipal energy systems, which supply customers with heat and electricity, will play an important role in this task. The cumulative exergy consumption methodology considers resource consumption from the raw material to the final product. It includes the exergetic expenses for imported energy as well as for building the energy infrastructure. In this paper, we determine the exergy optimal energy system design of an exemplary municipal energy system by using cumulative exergy consumption minimisation. The results of a case study show that well a linked electricity and heat system using heat pumps, combined heat power plants and battery and thermal storages is necessary. This enables an efficient supply and also provides the necessary flexibilities for integrating variable renewable energy sources.

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