scholarly journals Energy Analysis of A Hybrid Wind-Wave Solution For Remote Islands

2021 ◽  
Vol 6 ◽  
pp. 34
Author(s):  
Spyridon Trikalitis ◽  
George Lavidas ◽  
John K. Kaldellis

The energy needs of most Aegean islands are covered by the operation of autonomous/local power stations (APS/LPS) using imported oil. The costly operation of the APS/LPS combined with the resulting environmental problems, set the issue of a sustainable and rational energy solution mainly for the remote islands, showing respect to the sensitive island ecosystems and the acceptance of local communities. In this context, high wind speeds as well as the remarkable wave potential of the Aegean Archipelagos could be the driving force for a sustainable energy supply solution for these islands by exploiting combined energy sources along with an appropriate energy storage system, comprising a modern hybrid renewable based station. Moreover, the exploitation of wave energy is one of the future priorities of the European Union (Blue Growth) in an effort to support the installation of wave energy converters, which are in the final stage of technological development. The proposed analysis examines the combined exploitation of the wave and wind potential for a representative medium sized island of the Aegean Archipelagos in order to cover its electrical needs. The results show that the installation of a hybrid power station contributes to a higher integration of renewable energy systems (RES) into an autonomous micro-grid and that the stochastic production of wind turbines can be counterbalanced due to the smoother (time-dependent) production of wave systems. In addition, the ability to store excess renewable energy enhances the energy supply security of an island micro-grid providing a clean energy solution for the remote Aegean island communities and thus reducing their oil dependence.

Author(s):  
Almas Heshmati ◽  
Shahrouz Abolhosseini

This chapter reviews relevant literature on the current state and effectiveness of developing renewable energy on energy security in general, and on energy security in the European Union (EU) in particular. The chapter elaborates on primary energy import sources, possible alternatives, and how energy security is affected by the sources of supply. It also gives an analysis of the effects of the Ukrainian crisis, the isolation of Iran on diversification sources, and on European energy security. It examines EU’s energy policy, analyses the best motivation for a new energy policy direction within Europe, and suggests alternative solutions for enhanced energy supply security. The aim is to suggest suitable solutions for energy security in Europe through energy supply diversification. Supply diversification includes alternative energy corridors for reducing dependency on Russia as a supplier and enhancing the power generated by renewable energy sources under the European Union 2020 strategy.


Author(s):  
Ana-Maria Iulia Şanta

Abstract The European Commission has the initiative to foster the sector of renewable energy and to build an Energy Union, with a common energy market at the level of the European Union, but is this only an utopic vision or is this possible to achieve? The topic of clean energy is very new and of great interest for the European Union, which is shown by the fact that the European Commission recently adopted on the 30th November 2016 the package “Clean Energy for All Europeans”, which contains proposals for the modernization of the energy market at the level of the European Union. But which are the challenges such a project is confronted with? According to the literature, such challenges are related to the process of liberalization of electricity markets. Conflicts between national interest and international actors of the energy market might occur. Due to the oligopolistic structure of the energy market, there are several barriers to the market entry. In order to answer to the research questions, case studies regarding the liberalization of the energy market will be analyzed in a comparative manner, offering an international overview. Furthermore, the legal provisions on which the common energy policy of the European Union relies, will be analyzed, as well as their economic and social impact. The package “Clean Energy for All Europeans” comprises a proposal of the revised Renewable energy Directive, energy efficiency measures and issues related to the Energy Union Governance. It contains as well proposals for the electricity market design, which will be analyzed and the present paper outlines the contribution of this proposal in building a common energy market of the European Union. What role does competition play in implementing the common energy market of the European Union? Which role do competition authorities have in this context? These are interesting aspects to be analyzed in the present paper.


2017 ◽  
Vol 12 (2) ◽  
pp. 334-345
Author(s):  
Ana-Maria Iulia Şanta

Abstract The European Commission has the initiative to foster the sector of renewable energy and to build an Energy Union, with a common energy market at the level of the European Union, but is this only a utopic vision or is this possible to achieve? The topic of clean energy is very new and of great interest for the European Union, which is shown by the fact that the European Commission recently adopted on the 30th November 2016 the package “Clean Energy for All Europeans”, which contains proposals for the modernization of the energy market at the level of the European Union. But which are the challenges such a project is confronted with? According to the literature, such challenges are related to the process of liberalization of electricity markets. Conflicts between national interest and international actors of the energy market might occur. Due to the oligopolistic structure of the energy market, there are several barriers to the market entry. In order to answer to the research questions, case studies regarding the liberalization of the energy market will be analyzed in a comparative manner, offering an international overview. Furthermore, the legal provisions on which the common energy policy of the European Union relies, will be analyzed, as well as their economic and social impact. The package “Clean Energy for All Europeans” comprises a proposal of the revised Renewable energy Directive, energy efficiency measures and issues related to the Energy Union Governance. It contains as well proposals for the electricity market design, which will be analyzed and the present paper outlines the contribution of this proposal in building a common energy market of the European Union. What role does competition play in implementing the common energy market of the European Union? Which role do competition authorities have in this context? These are interesting aspects to be analyzed in the present paper.


2017 ◽  
Vol 15 (1) ◽  
Author(s):  
Nee Au Yong Hui ◽  
Lim Tan Kock

Malaysia has realised the importance of renewable energy (RE) in the energy mix and continuously reviewing its energy policy to ensure sustainable energy supply. The use of RE is among the options although the RE capacity is still underutilized. Malaysia achieves 5.5% share of RE in the energy mix by 2015, and the RE sector is expected to double by 2020 with strong growth in the solar photovoltaic (PV), biomass and biogas markets. Beyond 2020, it is predicted that solar energy will surpass all other forms of RE for Malaysia and other countries, and the solar power will be the long term source of energy supply. After an investigation on the RE policy, the domestic solar PV manufacturing scenario is elaborated in this paper. This includes the solar PV manufacturing, issues and trade disputes, and the way forward. Among the key findings from this paper include: the foreign direct investment (FDI) related to RE sector especially from the US and lately China, have increased rapidly, and more ‘green' jobs in the solar PV manufacturing and installation sectors have been created. With the existence of trade disputes between the United States and the European Union with China, Malaysia has the potential to reap benefits with the inflow of direct investments from China. Nevertheless, the future incidence of RE trade disputes is still uncertain.


2020 ◽  
Vol 6 (1) ◽  
pp. 15-20
Author(s):  
Jozef Holjenčík ◽  
František Janíček ◽  
Vladimír Šály ◽  
Katarína Knošková ◽  
Dáša Šišková ◽  
...  

<span style="font-family: 'Times New Roman',serif; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-GB">Support for electricity produced from renewable energy sources is a key priority for the European Union due to reasons of security and diversification of energy supply, environmental protection, sustainable development, and because the use of electricity from renewable sources is an important part of the measures necessary to comply with the Kyoto Protocol. The article is also focused on several options settlement balance between the producer and supplier of electricity produced from renewable energy sources.</span>


2020 ◽  
Vol 21 (1) ◽  
pp. 21-40
Author(s):  
Rosario J Taa ◽  
Karinda Febrinia ◽  
Jhon Jefri Rumbino ◽  
Yoel Parakletos Pandiangan ◽  
Renata Iglesyanna ◽  
...  

This research tries to explain how to overcome the problems that occur in the EU (European Union). The concept used is environmental diplomacy. The concept of environmental diplomacy is used to explain the environmental conflict between the EU and Indonesia. Keywords: EU Clean Energy, Diplomacy, Environment.


2018 ◽  
Vol 10 (11) ◽  
pp. 4270 ◽  
Author(s):  
Li Li ◽  
Jiadong Zhu ◽  
Guanqiong Ye ◽  
Xuehao Feng

Considering the rapid development of maritime logistics, the reduction of energy consumption at ports is important in the sustainable development of global economics. Oceans have been known as sources of clean energy, and wave energy is attracting more and more attention from both scholars and practitioners. Even though much effort has been made to develop advanced technologies of wave energy, it is still not clear how ports and electricity plants will evaluate its performance and make decisions on the investment. This paper analyzed the decision framework of ports and electricity plants that can decide how much to invest into wave energy converters, by considering the uncertainty of wave energy supply. A mathematical model is developed to obtain the optimal decisions of a single port and electricity plant for different cases. We show that in most cases, the port has a no lower motivation for investing in the wave energy than the electricity plant. Our theoretical analyses also shed light on the impacts of the parameters on the optimal decisions. Considering the difficulty in estimating the uncertainty of wave energy supply, we extend the distribution-free model to our problem which can make our model more practical.


2021 ◽  
Vol 9 (5) ◽  
pp. 490
Author(s):  
Erfan Amini ◽  
Danial Golbaz ◽  
Rojin Asadi ◽  
Mahdieh Nasiri ◽  
Oğuzhan Ceylan ◽  
...  

One of the most encouraging sorts of renewable energy is ocean wave energy. In spite of a large number of investigations in this field during the last decade, wave energy technologies are recognised as neither mature nor broadly commercialised compared to other renewable energy technologies. In this paper, we develop and optimise Power Take-off (PTO) configurations of a well-known wave energy converter (WEC) called a point absorber. This WEC is a fully submerged buoy with three tethers, which was proposed and developed by Carnegie Clean Energy Company in Australia. Optimising the WEC’s PTO parameters is a challenging engineering problem due to the high dimensionality and complexity of the search space. This research compares the performance of five state-of-the-art metaheuristics (including Covariance Matrix Adaptation Evolution Strategy, Gray Wolf optimiser, Harris Hawks optimisation, and Grasshopper Optimisation Algorithm) based on the real wave scenario in Sydney sea state. The experimental achievements show that the Multiverse optimisation (MVO) algorithm performs better than the other metaheuristics applied in this work.


Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6030
Author(s):  
Tomasz Jałowiec ◽  
Henryk Wojtaszek

There is a need to reduce carbon-based energy and replace it with clean energy in order to counteract the negative effects of climate change. The increase in renewable energy sources may result in savings and the increasing cost of maintaining carbon-based energy. Worldwide involvement is required. The fulfillment of conditions by individual states does not solve the problem. The COVID-19 pandemic has slowed economic growth. It turns out that economic growth is not always associated with increased investments in RES (existing or emerging new clean energy points). We have a new epidemiological threat—Delta—which could become large. This will not improve the situation. Germany is an exemplary country for benchmarking in the field of renewable energy. The worrying fact is that Poland, despite economic growth, does not achieve an even growth in RES. Each of us is required to be involved, to be open to innovation and to act in accordance with the energy policy of the European Union. Basic management functions (planning, organizing, motivating and controlling) are also essential. Failure to meet the demands of the energy policy should be thoroughly verified and consequences should be drawn in order to involve the whole world. The authors thoroughly analyzed many factors that have a significant impact on the success in stopping climate change and increasing RES. With the increase in energy demand, renewable energy is introduced to a greater extent. Additionally, coal energy will be more expensive to maintain. The more RES, the more expensive the energy obtained from mine sources. The investment is an opportunity to meet the demands of RES, but investors are currently only interested in investing in renewable energy in highly developed countries. The decision-making process regarding the implementation of renewable energy sources not only consists in a radical decision to introduce changes, but also in the fulfillment of a number of assumptions regarding the energy policy controlled by the authorities of a given state as part of this action. There is a risk (fear) in underdeveloped countries that they will not be able to finalize this project, either due to the lack of investor interest or the lack of real opportunities due to the failure to meet the guidelines of the energy policy of a given country. It is advisable that state governments facilitate the process as much as possible so that even less developed countries could take advantage of this postulate.


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