Special Issue "Sustainable Energy Reviews"

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "Sustainable Energy".

Deadline for manuscript submissions: 30 April 2020.

Special Issue Editors

Prof. Dr. Dalia Štreimikienė
E-Mail Website
Guest Editor
Lithuanian Energy Institute, Kaunas, LT-44403, Lithuania
Interests: environmental and climate change mitigation policies; sustainable development; sustainability assessment in energy
Special Issues and Collections in MDPI journals
Prof. Dr. Tomas Baležentis
E-Mail Website
Guest Editor
Lithuanian Institute of Agrarian Economics, Vilnius 01113, Lithuania
Interests: sustainable agriculture, sustainability assessment, MCDA, DEA, Decomposition Analysis etc.
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

Sustainable energy development is the main target and challenge for energy sector development, as the energy sector is a major driver of economic growth and has a significant negative impact on the environment, especially on global climate change. This Special Issue welcomes review papers, original research and case studies dealing with applications of renewable energy resources and energy efficiency improvements in all sectors of the economy, sustainable energy technologies, sustainability assessment tools and models, and policies and regulatory frameworks to promote sustainable energy in the form of in-depth analysis, and critiques and comparative assessments. Impact assessments of the effect of sustainable energy development on the environment, economics and society can provide valuable insights into the developing energy sector and provide policy implications.

Prof. Dr. Dalia Štreimikienė
Prof. Dr. Tomas Baležentis
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Energy Systems and Sustainability
  • Sustainbale Energy Sources and Technologies
  • Renewable Energy Sources and Technologies
  • New Energy Technologies
  • Energy Efficiency Improvements
  • Energy and Climate Change Mitigation Policies
  • Sustainbaility Assessment of Energy Sources, Technologies, Policies
  • MCDA Tools and Frameworks
  • Surveys and Experiments on Energy Sustainability.

Published Papers (7 papers)

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Research

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Open AccessArticle
The Benefits of Variable Speed Operation in Hydropower Plants Driven by Francis Turbines
Energies 2019, 12(19), 3719; https://doi.org/10.3390/en12193719 - 29 Sep 2019
Abstract
Climate change and environmental degradation has resulted in a reduction in water inflow at hydropower plants, as well as a decrease in reservoir levels. Existing hydropower plants suffer from water head reduction, mainly with decrease in efficiency of energy conversion in hydro turbines. [...] Read more.
Climate change and environmental degradation has resulted in a reduction in water inflow at hydropower plants, as well as a decrease in reservoir levels. Existing hydropower plants suffer from water head reduction, mainly with decrease in efficiency of energy conversion in hydro turbines. This paper showcases the benefits of operations with variable speed in existing hydropower plants, when working at a lower water head than the rated one. Theoretical analyses and tests were performed in a special constructed laboratorial setup aiming at evaluating the amount of efficiency recovery with variable speed operation. Connection alternatives for a constant frequency grid and applications of the learned concepts in an existent hydropower plant are presented. The investigations were applied to the Furnas hydropower plant. The results point out that economic feasibility of the application can be achieved. Full article
(This article belongs to the Special Issue Sustainable Energy Reviews)
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Open AccessArticle
Comparative Review of Corporate Social Responsibility of Energy Utilities and Sustainable Energy Development Trends in the Baltic States
Energies 2019, 12(18), 3417; https://doi.org/10.3390/en12183417 - 04 Sep 2019
Abstract
This paper aims at developing the theoretical framework for linking the CSR of energy utilities with sustainable energy development achievements and at applying this framework in selected countries. The main issues of CSR relevant to the energy sector are discussed, and a comparative [...] Read more.
This paper aims at developing the theoretical framework for linking the CSR of energy utilities with sustainable energy development achievements and at applying this framework in selected countries. The main issues of CSR relevant to the energy sector are discussed, and a comparative analysis of CSR reports of energy utilities and sustainable energy development trends in the Baltic States (Lithuania, Latvia, and Estonia) is performed based on the developed framework. There are three main interlinked sustainable energy development targets: increase in energy efficiency, the use of renewable energy sources, and GHG emission reduction. The significance of CSR in the energy sector is underlined based on the literature review, and the state policies to promote CSR in the energy sector are discussed and critically assessed based on the case studies of three Baltic States. The CSR practices of energy utilities of the Baltic States were assessed and compared with sustainable energy development achievements in these countries, based on the analysis of sustainable energy development trends. Estonia achieved the best results in approaching all sustainable energy development targets and was ranked with the highest scores in CSR ranking among the Baltic States, followed by Lithuania. The results of the case studies demonstrate that the Baltic countries have achieved different results in sustainable energy development progress, and the role of energy utilities and their corporate sustainability practices may have huge impacts on the achievement of sustainable energy development targets. Full article
(This article belongs to the Special Issue Sustainable Energy Reviews)
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Open AccessArticle
Sustainable Economic Development and Greenhouse Gas Emissions: The Dynamic Impact of Renewable Energy Consumption, GDP, and Corruption
Energies 2019, 12(17), 3289; https://doi.org/10.3390/en12173289 - 26 Aug 2019
Abstract
The paper investigates the relationships between economic, social, and environmental dimensions of sustainable development. GDP growth represents the main economic dimension, greenhouse gas (GHG) emissions and renewable energy consumption the environmental dimension, and corruption the social dimension of sustainable development. The investigation of [...] Read more.
The paper investigates the relationships between economic, social, and environmental dimensions of sustainable development. GDP growth represents the main economic dimension, greenhouse gas (GHG) emissions and renewable energy consumption the environmental dimension, and corruption the social dimension of sustainable development. The investigation of these relationships is based on the concept of the Environmental Kuznets Curve hypothesis about the non-linear relationship between economic growth and environmental pollution. The authors used the panel data of EU countries and Ukraine for 2000–2016 years from the Eurostat database. The obtained results confirmed the Environmental Kuznets curve hypothesis for the EU and Ukraine. All the indicators were statistically significant at 1% and 5% levels. The findings proved that increasing renewable energy (RE) by 1% led to a decline of GHG in the interval (0.166103, 0.220551), and аn increase of the Control of Corruption Index by 1% provoked a decline of GHG by 0.88%. The conducted study enabled the authors to conclude that Ukraine needs to increase the GDP level per capita given the economy diversification and via the introduction of more effective and “clean” production technologies. Full article
(This article belongs to the Special Issue Sustainable Energy Reviews)
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Open AccessArticle
The Impact of Urbanization and Industrialization on Energy Security: A Case Study of China
Energies 2019, 12(11), 2194; https://doi.org/10.3390/en12112194 - 09 Jun 2019
Abstract
Currently, due to the recent unprecedented urbanization and industrialization, energy consumption in China is increasing at an enormous speed. However, this process should go hand in hand with sustainable energy development that is based on three interconnected dimensions: (i) energy security, (ii) energy [...] Read more.
Currently, due to the recent unprecedented urbanization and industrialization, energy consumption in China is increasing at an enormous speed. However, this process should go hand in hand with sustainable energy development that is based on three interconnected dimensions: (i) energy security, (ii) energy affordability, and (iii) environmental sustainability. It becomes very obvious that an increase in energy efficiency leads to the increase in both energy security and environmental sustainability. Therefore, inadequate energy efficiency causes energy security and environmental sustainability issues, and thus negatively influences economic development of China (or any other country for that matter). This paper explores the intrinsic relationship among urbanization, industrialization, and energy security, as well as the influencing mechanisms of urbanization and industrialization on energy efficiency using a fixed effect model. The paper employs panel data from 30 provinces in mainland China collected in the time range from 2006 to 2015. Our results demonstrate that urbanization and industrialization can significantly improve energy efficiency. Although energy security level decreases considerably with the rise of energy consumption and population growth, the increase in urbanization and industrialization levels can increase energy security through energy efficiency improvements. Moreover, it appears that changes in disposable income and population structure do not alter the effects of industrialization and urbanization on energy security. We conclude that Chinese provinces with high and low urbanization levels should focus on technological innovation and increase industrial development and technological input, respectively. Local governments in China can formulate policies and regulations and promote urbanization according to local economic development and industrial and population structure. The paper also presents theoretical references and decision support that might help in developing local laws and regulations promoting energy efficiency during urbanization and industrialization. Full article
(This article belongs to the Special Issue Sustainable Energy Reviews)
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Open AccessArticle
Analysis and Comparison of Some Low-Temperature Heat Sources for Heat Pumps
Energies 2019, 12(10), 1853; https://doi.org/10.3390/en12101853 - 15 May 2019
Abstract
The efficiency of a heat pump energy system is significantly influenced by its low-temperature heat source. This paper presents the results of operational monitoring, analysis and comparison of heat transfer fluid temperatures, outputs and extracted energies at the most widely used low temperature [...] Read more.
The efficiency of a heat pump energy system is significantly influenced by its low-temperature heat source. This paper presents the results of operational monitoring, analysis and comparison of heat transfer fluid temperatures, outputs and extracted energies at the most widely used low temperature heat sources within 218 days of a heating period. The monitoring involved horizontal ground heat exchangers (HGHEs) of linear and Slinky type, vertical ground heat exchangers (VGHEs) with single and double U-tube exchanger as well as the ambient air. The results of the verification indicated that it was not possible to specify clearly the most advantageous low-temperature heat source that meets the requirements of the efficiency of the heat pump operation. The highest average heat transfer fluid temperatures were achieved at linear HGHE (8.13 ± 4.50 °C) and double U-tube VGHE (8.13 ± 3.12 °C). The highest average specific heat output 59.97 ± 41.80 W/m2 and specific energy extracted from the ground mass 2723.40 ± 1785.58 kJ/m2·day were recorded at single U-tube VGHE. The lowest thermal resistance value of 0.07 K·m2/W, specifying the efficiency of the heat transfer process between the ground mass and the heat transfer fluid, was monitored at linear HGHE. The use of ambient air as a low-temperature heat pump source was considered to be the least advantageous in terms of its temperature parameters. Full article
(This article belongs to the Special Issue Sustainable Energy Reviews)
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Review

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Open AccessReview
A Review of Daylighting System: For Prototype Systems Performance and Development
Energies 2019, 12(15), 2863; https://doi.org/10.3390/en12152863 - 25 Jul 2019
Abstract
Daylighting systems make daylight illuminance possible, and the development of prototype daylighting systems can provide more efficient daylight illuminance. The purpose of this article is to review the development and performance of prototype daylighting systems in the last decade. The passive and active [...] Read more.
Daylighting systems make daylight illuminance possible, and the development of prototype daylighting systems can provide more efficient daylight illuminance. The purpose of this article is to review the development and performance of prototype daylighting systems in the last decade. The passive and active daylighting systems are listed separately and divided into the four categories by the presence and absence of hybrid. Each prototype daylighting system was evaluated in terms of cost and daylight performance and as well as their novel optical design. We evaluated the architecture and daylighting principles of each system by reviewing individual prototype daylighting systems. The cost of prototype systems still poses a challenge to development. How to use passive or active systems in different environments and whether or not electrical lighting assistance is needed is a controversial issue. However, active daylighting systems equipped with solar tracking systems are still mainstream. This research is a valuable resource for daylight researchers and newcomers. It is helpful to understand the advantages of various prototype daylighting systems and commercial daylighting systems that have been developed for many years; moreover, it is also possible to know the research directions suggested by the prototype daylighting systems. These will be of further use in developing innovative and better daylighting systems and designs. Full article
(This article belongs to the Special Issue Sustainable Energy Reviews)
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Open AccessReview
The Potential and Status of Renewable Energy Development in Malaysia
Energies 2019, 12(12), 2437; https://doi.org/10.3390/en12122437 - 25 Jun 2019
Cited by 1
Abstract
The Malaysian Government has set an ambitious target to achieve a higher penetration of Renewable Energy (RE) in the Malaysian energy mix. To date, Malaysia has approximately 2% of its energy coming from RE generation sources compared to the total generation mix and [...] Read more.
The Malaysian Government has set an ambitious target to achieve a higher penetration of Renewable Energy (RE) in the Malaysian energy mix. To date, Malaysia has approximately 2% of its energy coming from RE generation sources compared to the total generation mix and targets achieving 20% penetration by 2025. The current energy mix for Malaysia power generation is mainly provided by natural gas and coal. The discussion will cover the traditional sources of generation including natural gas, coal and big hydro stations. In addition, the paper will cover in depth the potential of RE in the country, challenges, and opportunities in this sector. This study can give an initial evaluation of the Malaysian energy industry, especially for RE and can initiate further research and development in this area in order to support the Government target to achieve RE target of 20% by 2025. Full article
(This article belongs to the Special Issue Sustainable Energy Reviews)
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