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BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity"

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "B: Energy and Environment".

Deadline for manuscript submissions: closed (25 December 2021) | Viewed by 58768

Printed Edition Available!
A printed edition of this Special Issue is available here.

Special Issue Editors

Prof. Dr. Sergio Ulgiati

E-Mail Website
Guest Editor
1. Department of Science and Technology, Parthenope University of Naples, Centro Direzionale, Isola C4, 80143 Napoli, Italy
2. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, No. 19 Xinjiekouwai Street, Beijing 100875, China
Interests: life cycle assessment; energy–exergy–emergy; environmental impact assessment; circular economy; urban metabolism and sustainability; food and water security; disparity in access to energy sources; large efforts invested in energy and resource efficiency, prosperous way down, and environmental integrity
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Hans Schnitzer

E-Mail Website1 Website2
Guest Editor
1. Process Engineering and Energy Systems, Institute of Process and Particle Engineering, Graz University of Technology, Rechbauerstraße 12, 8010 Graz, Austria
2. StadtLABOR – Innovation for Urban Sustainability, Griesgasse 40, 8020 Graz, Austria
Interests: energy efficiency and renewable energies for production processes and urban systems; water-energy nexus; life-long learning system in many aspects of sustainability
Dr. Remo Santagata

E-Mail Website
Guest Editor
Department of Engineering, Parthenope University of Naples, Centro Direzionale, Isola C4, 80143 Napoli, Italy
Interests: environmental impact assessment; environment; sustainability; renewable energy technologies; energy engineering; environmental analysis; environmental management; sustainable development; power generation; environmental pollution
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

This Special Issue refers to the 11th edition of BIWAES, which will take place in parallel to the European Roundtable “Consumption and Production in a plus 1.5°C World”, Graz (Austria), 8. – 10. September 2021, www.erscp2021.eu.

A new energy scarcity

Energy is a fundamental resource for societal and economic metabolisms; not only do we need energy, but we clearly need to address crucial questions about its use (energy to do what? energy from where?) and appropriate management (top-down vs. bottom-up energy policy making). As is well known, a new kind of energy scarcity is occurring, not only due to limited abundance, but increasingly due to environmental constraints and trade-offs, to unequal availability worldwide and market prices.

Achieving sustainable economies and shared wellbeing calls for an urgent re-framing of the energy problem toward a balanced mix of solutions. The latter include technological improvement, use of energy resources consistent with their thermodynamic properties, a selection of environmentally friendly sources and carriers, suitable approaches to monitoring of impacts, efficiency measures with rebound control, lifestyle equity and reduction of energy poverty, decrease in wasteful habits, recognition of environmental limits in a limited planet, and careful management of the energy-water-food-environment nexus.

Empowering Communities

Who is in charge for energy solutions? Scientists and technology experts have absolutely provided important contributions within Academy and Business, orienting energy policy making. However, some top-down solutions have not always shown the ability to fully address the needs of communities, nor have they promoted stakeholders and citizens’ participation toward tailored solutions for the different situations. It may be time to integrate top-down and bottom-up efforts in order to benefit from community insight and knowledge (be they regional, urban, neighborhood and condominium realities, rural organizations, developing communities worldwide) and see needs and solutions that are visible to local realities and not easily visible to experts and policy makers.

Interdisciplinary evaluations

It clearly appears that the energy problem cannot only be addressed in thermodynamic or technological terms. A deeper understanding of trends, solutions and policies can only be achieved through converging efforts by different disciplinary sectors, so that economic, social, environmental, cultural, and psychological expertise converges into an innovative picture of local and larger communities toward shared wellbeing.

Prof. Dr. Sergio Ulgiati
Prof. Dr. Hans Schnitzer
Dr. Remo Santagata
Guest Editors

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Published Papers (15 papers)

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Editorial

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3 pages, 166 KiB  
Editorial
Empowering Communities, beyond Energy Scarcity
by Sergio Ulgiati, Hans Schnitzer and Remo Santagata
Energies 2022, 15(11), 4106; https://doi.org/10.3390/en15114106 - 2 Jun 2022
Cited by 1 | Viewed by 1649
Abstract
“If we talk of promoting development, what have we in mind: goods or people [...] Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")

Research

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24 pages, 4547 KiB  
Article
Roadmap to Neutrality—What Foundational Questions Need Answering to Determine One’s Ideal Decarbonisation Strategy
by Stefan M. Buettner
Energies 2022, 15(9), 3126; https://doi.org/10.3390/en15093126 - 25 Apr 2022
Cited by 9 | Viewed by 4082
Abstract
Considering increasingly ambitious pledges by countries and various forms of pressure from current international constellations, society, investors, and clients further up the supply chain, the question for companies is not so much whether to take decarbonisation action, but what action and by when. [...] Read more.
Considering increasingly ambitious pledges by countries and various forms of pressure from current international constellations, society, investors, and clients further up the supply chain, the question for companies is not so much whether to take decarbonisation action, but what action and by when. However, determining an ideal mix of measures to apply ‘decarbonisation efficiency’ requires more than knowledge of technically feasible measures and how to combine them to achieve the most economic outcome: In this paper, working in a ‘backcasting’ manner, the author describes seven aspects which heavily influence the composition of an ‘ideal mix’ that executive leadership needs to take a (strategic) position on. Contrary to previous studies, these aspects consider underlying motivations and span across (socio-)economic, technical, regulatory, strategic, corporate culture, and environmental factors and further underline the necessity of clarity of definitions. How these decisions influence the determination of the decarbonisation-efficient ideal mix of measures is further explored by providing concrete examples. Insights into the choices taken by German manufacturers regarding several of these aspects stem from about 850 responses to the ‘Energy Efficiency Index of German Industry’. Knowledge of the status quo, and clarity in definitions, objectives, time frames, and scope are key. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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14 pages, 1754 KiB  
Article
The Thermoeconomic Environment Cost Indicator (iex-TEE) as a One-Dimensional Measure of Resource Sustainability
by Sobhy Khedr, Melchiorre Casisi and Mauro Reini
Energies 2022, 15(6), 2260; https://doi.org/10.3390/en15062260 - 19 Mar 2022
Cited by 3 | Viewed by 2569
Abstract
This paper presents a conceptual development of sustainability evaluation, through an exergy-based indicator, by using the new concept of the Thermoeconomic Environment (TEE). The exergy-based accounting methods here considered as a background are Extended Exergy Accounting (EEA), which can be used to quantify [...] Read more.
This paper presents a conceptual development of sustainability evaluation, through an exergy-based indicator, by using the new concept of the Thermoeconomic Environment (TEE). The exergy-based accounting methods here considered as a background are Extended Exergy Accounting (EEA), which can be used to quantify the exergy cost of externalities like labor, monetary inputs, and pollutants, and Cumulative Exergy Consumption (CExC), which can be used to quantify the consumption of primary resources embodied in a final product or service. The new concept of bioresource stock replacement cost is presented, highlighting how the framework of the TEE offers an option for evaluating the exergy cost of products of biological systems. This sustainability indicator is defined based on the exergy cost of all resources directly and indirectly consumed by the system, the equivalent exergy cost of all externalities implied in the production process and the exergy cost of the final product. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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26 pages, 1300 KiB  
Article
Social and Environmental Assessment of a Solidarity Oriented Energy Community: A Case-Study in San Giovanni a Teduccio, Napoli (IT)
by Serena Kaiser, Mariana Oliveira, Chiara Vassillo, Giuseppe Orlandini and Amalia Zucaro
Energies 2022, 15(4), 1557; https://doi.org/10.3390/en15041557 - 20 Feb 2022
Cited by 8 | Viewed by 3317
Abstract
Renewable energy communities (RECs) are alternatives toward sustainable production and consumption pathways. In 2020, Italy implemented the EU Directive 2018/2001, defining a common framework for promoting energy from renewable sources. The “Famiglia di Maria”, a foundation dealing with social issues in San Giovanni [...] Read more.
Renewable energy communities (RECs) are alternatives toward sustainable production and consumption pathways. In 2020, Italy implemented the EU Directive 2018/2001, defining a common framework for promoting energy from renewable sources. The “Famiglia di Maria”, a foundation dealing with social issues in San Giovanni a Teduccio, Napoli (Italy), in collaboration with “Legambiente” and “Con il Sud” Foundations, released the first Solidarity Oriented Renewable Energy Community project in Italy. Therefore, by applying social life cycle assessment (s-LCA) and life cycle assessment (LCA) methodologies, this study aims to: (i) promote the dissemination of RECs in the Italian and European contexts, (ii) suggest REC scenarios for the best social and environmental solutions, and (iii) support the policymakers for sustainable local development. Some key results show that the solidarity-oriented project has already produced mature outcomes about community cohesion. In contrast, technical skills and awareness about environmental issues still need to be further developed and shared among the stakeholders. Finally, social and environmental indicators converge on the self-consumption model as a feasible alternative for energy justice, community empowerment, and economic and market competition independence. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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18 pages, 20318 KiB  
Article
The Impact of Detail, Shadowing and Thermal Zoning Levels on Urban Building Energy Modelling (UBEM) on a District Scale
by Xavier Faure, Tim Johansson and Oleksii Pasichnyi
Energies 2022, 15(4), 1525; https://doi.org/10.3390/en15041525 - 18 Feb 2022
Cited by 19 | Viewed by 3535
Abstract
New modelling tools are required to accelerate the decarbonisation of the building sector. Urban building energy modelling (UBEM) has recently emerged as an attractive paradigm for analysing building energy performance at district and urban scales. The balance between the fidelity and accuracy of [...] Read more.
New modelling tools are required to accelerate the decarbonisation of the building sector. Urban building energy modelling (UBEM) has recently emerged as an attractive paradigm for analysing building energy performance at district and urban scales. The balance between the fidelity and accuracy of created UBEMs is known to be the cornerstone of the model’s applicability. This study aimed to analyse the impact of traditionally implicit modeller choices that can greatly affect the overall UBEM performance, namely, (1) the level of detail (LoD) of the buildings’ geometry; (2) thermal zoning; and (3) the surrounding shadowing environment. The analysis was conducted for two urban areas in Stockholm (Sweden) using MUBES—the newly developed UBEM. It is a bottom-up physics-based open-source tool based on Python and EnergyPlus, allowing for calibration and co-simulation. At the building scale, significant impact was detected for all three factors. At the district scale, smaller effects (<2%) were observed for the level of detail and thermal zoning. However, up to 10% difference may be due to the surrounding shadowing environment, so it is recommended that this is considered when using UBEMs even for district scale analyses. Hence, assumptions embedded in UBEMs and the scale of analysis make a difference. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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23 pages, 2817 KiB  
Article
Potential Energy Savings from Circular Economy Scenarios Based on Construction and Agri-Food Waste in Italy
by Patrizia Ghisellini, Amos Ncube, Gianni D’Ambrosio, Renato Passaro and Sergio Ulgiati
Energies 2021, 14(24), 8561; https://doi.org/10.3390/en14248561 - 19 Dec 2021
Cited by 18 | Viewed by 4361
Abstract
In this study, our aim was to explore the potential energy savings obtainable from the recycling of 1 tonne of Construction and Demolition Waste (C&DW) generated in the Metropolitan City of Naples. The main fraction composing the functional unit are mixed C&DW, soil [...] Read more.
In this study, our aim was to explore the potential energy savings obtainable from the recycling of 1 tonne of Construction and Demolition Waste (C&DW) generated in the Metropolitan City of Naples. The main fraction composing the functional unit are mixed C&DW, soil and stones, concrete, iron, steel and aluminium. The results evidence that the recycling option for the C&DW is better than landfilling as well as that the production of recycled aggregates is environmentally sustainable since the induced energy and environmental impacts are lower than the avoided energy and environmental impacts in the life cycle of recycled aggregates. This LCA study shows that the transition to the Circular Economy offers many opportunities for improving the energy and environmental performances of the construction sector in the life cycle of construction materials by means of internal recycling strategies (recycling C&DW into recycled aggregates, recycled steel, iron and aluminum) as well as external recycling by using input of other sectors (agri-food by-products) for the manufacturing of construction materials. In this way, the C&D sector also contributes to realizing the energy and bioeconomy transition by disentangling itself from fossil fuel dependence. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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19 pages, 3016 KiB  
Article
Understanding the Sustainability of the Energy–Water–Land Flow Nexus in Transnational Trade of the Belt and Road Countries
by Gengyuan Liu, Asim Nawab, Fanxin Meng, Aamir Mehmood Shah, Xiaoya Deng, Yan Hao, Biagio F. Giannetti, Feni Agostinho, Cecília M. V. B. Almeida and Marco Casazza
Energies 2021, 14(19), 6311; https://doi.org/10.3390/en14196311 - 2 Oct 2021
Cited by 10 | Viewed by 3152
Abstract
Increasing economic and population growth has put immense pressure on energy, water and land resources to satisfy national and supra-national demand. Through trade, a large proportion of such a demand is fulfilled. With trade as one of its key priorities, the China Belt [...] Read more.
Increasing economic and population growth has put immense pressure on energy, water and land resources to satisfy national and supra-national demand. Through trade, a large proportion of such a demand is fulfilled. With trade as one of its key priorities, the China Belt and Road Initiative is a long-term transcontinental investment program. The initiative gained significant attention due to greater opportunities for economic development, large population and different levels of resource availability. The nexus approach has appeared as a new viewpoint in discussions on balancing the competing sectoral demands. However, following years of work, constraints exist in the scope and focus of studies. The newly developed multi-regional input–output (MRIO) models covering the world’s economy and its use of resources permit a comprehensive analysis of resource usage by production and consumption at different levels, and bring more knowledge about resource nexus problems. Using the MRIO model, this work simultaneously tracks energy, water and land use flows and investigates the transnational resource nexus. A nexus strength indicator is proposed which depends on ternary diagrams to grade countries based on their combined resources’ use and sectoral weighting. Equal sectoral weighting is assigned. The analysis presented a sectorally balanced nexus approach. Findings support existing work by recognizing energy, water and land as the robust transnational connections, from both production and consumption points of view. Resource nexus issues differ from country to country owing to inequalities in industrial set-up, preferences in economic policy and resource endowments. The paper outlines how key resource nexus problems can be identified and prioritized in view of alternative and often opposing interests. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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26 pages, 2207 KiB  
Article
The Transition to Clean Energy: Are People Living in Island Communities Ready for Smart Grids and Demand Response?
by Dana Abi Ghanem and Tracey Crosbie
Energies 2021, 14(19), 6218; https://doi.org/10.3390/en14196218 - 29 Sep 2021
Cited by 10 | Viewed by 2574
Abstract
Islands are widely recognised as ideal pilot sites that can spearhead the transition to clean energy and development towards a sustainable and healthy society. One of the assumptions underpinning this notion is that island communities are more ready to engage with smart grids [...] Read more.
Islands are widely recognised as ideal pilot sites that can spearhead the transition to clean energy and development towards a sustainable and healthy society. One of the assumptions underpinning this notion is that island communities are more ready to engage with smart grids (SGs) than people on the mainland. This is believed to be due to the high costs of energy on islands and the idea that the sense of community and collective action is stronger on islands than on the mainland. This paper presents findings from a survey conducted to assess people’s perception of, and readiness to engage with, SG and demand response (DR) in the communities of three islands taking part in a H2020 project called REACT. The main objective of the survey, conducted in 2020, was to inform the recruitment of participants in the project, which is piloting different technologies required for SGs and DR with communities on the three islands. The results show that many island residents are motivated to take part in SG, to engage with energy saving, and are willing to change some energy-related behaviours in their homes. However, the results also indicate that levels of ownership of, and knowledge and familiarity with, the SG and DR related technologies are extremely low, suggesting that the expected uptake of DR in islands might not be as high as anticipated. This brings into question the readiness of island dwellers for the SG, their role in the deployment of such schemes more widely and the validity of the assumptions often made about island communities. This has significant implications for the design of SGs and DR solutions for islands, including devoting sufficient efforts to build knowledge and awareness of the SG, investing in demonstration projects for that purpose and tailoring interventions based on island communities’ motivations. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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16 pages, 3233 KiB  
Article
Modeling Dynamic Multifractal Efficiency of US Electricity Market
by Haider Ali, Faheem Aslam and Paulo Ferreira
Energies 2021, 14(19), 6145; https://doi.org/10.3390/en14196145 - 27 Sep 2021
Cited by 18 | Viewed by 2732
Abstract
The dramatic deregulatory reforms in US electricity markets increased competition, resulting in more complex prices compared to other commodities. This paper aims to investigate and compare the overall and time-varying multifractality and efficiency of four major US electricity regions: Mass Hub, Mid C, [...] Read more.
The dramatic deregulatory reforms in US electricity markets increased competition, resulting in more complex prices compared to other commodities. This paper aims to investigate and compare the overall and time-varying multifractality and efficiency of four major US electricity regions: Mass Hub, Mid C, Palo Verde, and PJM West. Multifractal detrended fluctuation analysis (MFDFA) is employed to better quantify the intensity of self-similarity. Large daily data from 2001 to 2021 are taken in order to make a more conclusive analysis. The four electricity market returns showed strong multifractal features with PJM West having the highest multifractality (corresponding to lowest efficiency) and Mass Hub having the lowest multifractality (i.e., highest efficiency). Moreover, all series exhibited mean reverting (anti-persistent) behavior in the overall time period. The findings of MFDFA rolling window suggest Palo Verde as the most volatile index, while a significant upward trend in the efficiency of Mass Hub and PJM West is observed after the first quarter of 2014. The novel findings have important implications for policymakers, regulatory authorities, and decision makers to forecast electricity prices better and control efficiency. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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28 pages, 2303 KiB  
Article
Are You a Typical Energy Consumer? Socioeconomic Characteristics of Behavioural Segmentation Representatives of 8 European Countries
by Sylwia Słupik, Joanna Kos-Łabędowicz and Joanna Trzęsiok
Energies 2021, 14(19), 6109; https://doi.org/10.3390/en14196109 - 25 Sep 2021
Cited by 11 | Viewed by 2777
Abstract
Scarcity of resources and their waste, as well as deteriorating quality of life and the environment, are pressing problems of modern civilisations. Rational and efficient energy consumption is one of the possibilities for preventing harmful practices and the degradation of ecosystems. Understanding the [...] Read more.
Scarcity of resources and their waste, as well as deteriorating quality of life and the environment, are pressing problems of modern civilisations. Rational and efficient energy consumption is one of the possibilities for preventing harmful practices and the degradation of ecosystems. Understanding the consumer’s way of thinking and acting by identifying his needs and preferences are essential for effective efforts for smart, sustainable, and inclusive economic growth. Therefore, the aim of this article was a comprehensive socioeconomic analysis of particular behavioural types of energy consumers, as a continuation of the authors’ previous research. The paper uses statistical methods (chi-square test and correspondence analysis) dedicated to non-metric variables for an effective analysis of the data obtained from the questionnaires. The identification of socioeconomic factors was carried out on a representative sample of n = 4506 respondents from eight European countries (the Czech Republic, France, Greece, Spain, Germany, Poland, Romania, and the United Kingdom). This allowed for distinguishing a typical representative of five consumer segments (EI; AE; DS; O; I), developed on the basis of motivation to save energy. The authors succeeded in combining behavioural segmentation with the socioeconomic characteristics of the created classes. The results indicated that 10 out of 12 examined factors were significantly correlated with the behavioural type. These are (in order of significance): attitude towards saving energy; age; employment status; home country; the ownership status of the premises; the number of people in a household; average monthly income per person in a household; education; gender and place of residence. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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18 pages, 1516 KiB  
Article
The Role of Discounting in Energy Policy Investments
by Gabriella Maselli and Antonio Nesticò
Energies 2021, 14(19), 6055; https://doi.org/10.3390/en14196055 - 23 Sep 2021
Cited by 10 | Viewed by 2638
Abstract
For informing future energy policy decisions, it is essential to choose the correct social discount rate (SDR) for ex-ante economic evaluations. Generally, costs and benefits—both economic and environmental—are weighted through a single constant discount rate. This leads to excessive discounting of the present [...] Read more.
For informing future energy policy decisions, it is essential to choose the correct social discount rate (SDR) for ex-ante economic evaluations. Generally, costs and benefits—both economic and environmental—are weighted through a single constant discount rate. This leads to excessive discounting of the present value of cash flows progressively more distant over time. Evaluating energy projects through constant discount rates would mean underestimating their environmental externalities. This study intends to characterize environmental–economic discounting models calibrated for energy investments, distinguishing between intra- and inter-generational projects. In both cases, the idea is to use two discounting rates: an economic rate to assess financial components and an ecological rate to weight environmental effects. For intra-generational projects, the dual discount rates are assumed to be constant over time. For inter-generational projects, the model is time-declining to give greater weight to environmental damages and benefits in the long-term. Our discounting approaches are based on Ramsey’s growth model and Gollier’s ecological discounting model; the latter is expressed as a function of an index capable of describing the performance of a country’s energy systems. With regards to the models we propose, the novelty lies in the calibration of the “environmental quality” parameter. Regarding the model for long-term projects, another innovation concerns the analysis of risk components linked to economic variables; the growth rate of consumption is modelled as a stochastic variable. The defined models were implemented to determine discount rates for both Italy and China. In both cases, the estimated discount rates are lower than those suggested by governments. This means that the use of dual discounting approaches can guide policymakers towards sustainable investment in line with UN climate neutrality objectives. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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16 pages, 2933 KiB  
Article
Optimal Sizing of Hybrid Wind-Solar Power Systems to Suppress Output Fluctuation
by Abdullah Al-Shereiqi, Amer Al-Hinai, Mohammed Albadi and Rashid Al-Abri
Energies 2021, 14(17), 5377; https://doi.org/10.3390/en14175377 - 30 Aug 2021
Cited by 11 | Viewed by 3712
Abstract
Harnessing wind energy is one of the fastest-growing areas in the energy industry. However, wind power still faces challenges, such as output intermittency due to its nature and output reduction as a result of the wake effect. Moreover, the current practice uses the [...] Read more.
Harnessing wind energy is one of the fastest-growing areas in the energy industry. However, wind power still faces challenges, such as output intermittency due to its nature and output reduction as a result of the wake effect. Moreover, the current practice uses the available renewable energy resources as a fuel-saver simply to reduce fossil-fuel consumption. This is related mainly to the inherently variable and non-dispatchable nature of renewable energy resources, which poses a threat to power system reliability and requires utilities to maintain power-balancing reserves to match the supply from renewable energy resources with the real-time demand levels. Thus, further efforts are needed to mitigate the risk that comes with integrating renewable resources into the electricity grid. Hence, an integrated strategy is being created to determine the optimal size of the hybrid wind-solar photovoltaic power systems (HWSPS) using heuristic optimization with a numerical iterative algorithm such that the output fluctuation is minimized. The research focuses on sizing the HWSPS to reduce the impact of renewable energy resource intermittency and generate the maximum output power to the grid at a constant level periodically based on the availability of the renewable energy resources. The process of determining HWSPS capacity is divided into two major steps. A genetic algorithm is used in the initial stage to identify the optimum wind farm. A numerical iterative algorithm is used in the second stage to determine the optimal combination of photovoltaic plant and battery sizes in the search space, based on the reference wind power generated by the moving average, Savitzky–Golay, Gaussian and locally weighted linear regression techniques. The proposed approach has been tested on an existing wind power project site in the southern part of the Sultanate of Oman using a real weather data. The considered land area dimensions are 2 × 2 km. The integrated tool resulted in 39 MW of wind farm, 5.305 MW of PV system, and 0.5219 MWh of BESS. Accordingly, the estimated cost of energy based on the HWSPS is 0.0165 EUR/kWh. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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19 pages, 2474 KiB  
Article
Life Cycle Assessment for Integration of Solid Oxide Fuel Cells into Gas Processing Operations
by Khalid Al-Khori, Sami G. Al-Ghamdi, Samir Boulfrad and Muammer Koç
Energies 2021, 14(15), 4668; https://doi.org/10.3390/en14154668 - 1 Aug 2021
Cited by 25 | Viewed by 4023
Abstract
The oil and gas industry generates a significant amount of harmful greenhouse gases that cause irreversible environmental impact; this fact is exacerbated by the world’s utter dependence on fossil fuels as a primary energy source and low-efficiency oil and gas operation plants. Integration [...] Read more.
The oil and gas industry generates a significant amount of harmful greenhouse gases that cause irreversible environmental impact; this fact is exacerbated by the world’s utter dependence on fossil fuels as a primary energy source and low-efficiency oil and gas operation plants. Integration of solid oxide fuel cells (SOFCs) into natural gas plants can enhance their operational efficiencies and reduce emissions. However, a systematic analysis of the life cycle impacts of SOFC integration in natural gas operations is necessary to quantitatively and comparatively understand the potential benefits. This study presents a systematic cradle-to-grave life cycle assessment (LCA) based on the ISO 14040 and 14044 standards using a planar anode-supported SOFC with a lifespan of ten years and a functional unit of one MW electricity output. The analysis primarily focused on global warming, acidification, eutrophication, and ozone potentials in addition to human health particulate matter and human toxicity potentials. The total global warming potential (GWP) of a 1 MW SOFC for 10 years in Qatar conditions is found to be 2,415,755 kg CO2 eq., and the greenhouse gas (GHG) impact is found to be higher during the operation phase than the manufacturing phase, rating 71% and 29%, respectively. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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18 pages, 3695 KiB  
Article
Influence of Population Income on Energy Consumption for Heating and Its CO2 Emissions in Cities
by Pedro J. Zarco-Periñán, Irene M. Zarco-Soto, Fco. Javier Zarco-Soto and Rafael Sánchez-Durán
Energies 2021, 14(15), 4531; https://doi.org/10.3390/en14154531 - 27 Jul 2021
Cited by 3 | Viewed by 1950
Abstract
As a result of the increase in city populations, and the high energy consumption and emissions of buildings, cities in general, and buildings in particular, are the focus of attention for public organizations and utilities. Heating is among the largest consumers of energy [...] Read more.
As a result of the increase in city populations, and the high energy consumption and emissions of buildings, cities in general, and buildings in particular, are the focus of attention for public organizations and utilities. Heating is among the largest consumers of energy in buildings. This study examined the influence of the income of inhabitants on the consumption of energy for heating and the CO2 emissions in city buildings. The study was carried out using equivalized disposable income as the basis for the analysis and considered the economies of scale of households. The results are shown per inhabitant and household, by independently considering each city. Furthermore, to more clearly identify the influence of the population income, the study was also carried out without considering the influence of the climate. The method was implemented in the case of Spain. For this purpose, Spanish cities with more than 50,000 inhabitants were analyzed. The results show that, both per inhabitant and per household, the higher the income of the inhabitants, the greater the consumption of energy for heating and the greater the emissions in the city. This research aimed to help energy utilities and policy makers make appropriate decisions, namely, planning for the development of facilities that do not produce greenhouse gases, and enacting laws to achieve sustainable economies, respectively. The overall aim is to achieve the objective of mitigating the impact of emissions and the scarcity of energy resources. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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Review

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21 pages, 2042 KiB  
Review
Review of Renewable Energy Potentials in Indonesia and Their Contribution to a 100% Renewable Electricity System
by Jannis Langer, Jaco Quist and Kornelis Blok
Energies 2021, 14(21), 7033; https://doi.org/10.3390/en14217033 - 27 Oct 2021
Cited by 75 | Viewed by 12660
Abstract
Indonesia has an increasing electricity demand that is mostly met with fossil fuels. Although Indonesia plans to ramp up Renewable Energy Technologies (RET), implementation has been slow. This is unfortunate, as the RET potential in Indonesia might be higher than currently assumed given [...] Read more.
Indonesia has an increasing electricity demand that is mostly met with fossil fuels. Although Indonesia plans to ramp up Renewable Energy Technologies (RET), implementation has been slow. This is unfortunate, as the RET potential in Indonesia might be higher than currently assumed given the archipelago’s size. However, there is no literature overview of RET potentials in Indonesia and to what extent they can meet current and future electricity demand coverage. This paper reviews contemporary literature on the potential of nine RET in Indonesia and analyses their impact in terms of area and demand coverage. The study concludes that Indonesia hosts massive amounts of renewable energy resources on both land and sea. The potentials in the academic and industrial literature tend to be considerably larger than the ones from the Indonesian Energy Ministry on which current energy policies are based. Moreover, these potentials could enable a 100% renewables electricity system and meet future demand with limited impact on land availability. Nonetheless, the review showed that the research topic is still under-researched with three detected knowledge gaps, namely the lack of (i) economic RET potentials, (ii) research on the integrated spatial potential mapping of several RET and (iii) empirical data on natural resources. Lastly, this study provides research and policy recommendations to promote RET in Indonesia. Full article
(This article belongs to the Special Issue BIWAES 2021—Biennial International Workshop Advances in Energy Studies "Empowering Communities, Beyond Energy Scarcity")
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