EU Renewable Energy Research Articles

Cross-border concentrated solar power projects - opportunity or dead end? A study into actor views in Europe

Cross-border renewable energy projects (in particular those based on concentrated solar power (CSP)) could play an important role in the future EU energy systems. Be it by contributing to enhanced energy security, improving the management of the energy system or meeting the EU renewable energy target in a cost-effective manner. However, despite the expected benefits associated with the use of cooperation mechanisms set up under the Renewable Energy Directive, several barriers and, possibly, lack of active support have prevented a wide use of these mechanisms among Member States. This paper explores whether social acceptance, or lack thereof, can explain some of this lag in development. Collecting actor views on CSP cooperation mechanisms between EU Member States forms the basis of this analysis. The empirical basis consists of 43 interviews from Spain as a potential host for and Germany and the Netherlands as potential consumers of renewable energy (off-taker countries). The data analysis outlines that overall CSP cooperation mechanisms are seen positively; however, the complexity of implementation, heterogeneity of actor views, as well as high costs for CSP are perceived as downsides. Thus, overall, a societal impetus is missing and interest in further development seems limited.

Assessment of Durum Wheat (Triticum durum Desf.) Genotypes Diversity for the Integrated Production of Bioethanol and Grains

Wheat straw is an abundant source of lignocellulosic biomass that is generally not utilized for biofuel production, nor for other uses. Recent EU renewable energy directive fosters bioethanol production through lignocellulosic sugars fermentation, but the cost of this process is an issue that often depends on biomass characteristics. Lignin is a class of three-dimensional polymers providing structural integrity of plant tissues. Its complex structure, together with hemicelluloses and uronic acids content, could affect the ability of hydrolyzing biomass to fermentable sugars. To get insights into this variation, a set of 10 durum wheat genotypes was analyzed to determine variation of straw digestibility to fermentable sugars. The results showed that the lignin content was the major factor determining the recalcitrance to enzymatic process. The analysis of Spearman’s correlation indicated that the sugar released after enzymatic hydrolysis had a negative connection with the lignin content, while it was positively correlated with the culm length. The possible role of other cell wall components, such as arabinose and uronic acids, was also discussed. This work aimed at analyzing the diversity of lignocellulosic digestibility to fermentable sugars of wheat straw in a small germplasm collection. Some of the selected genotypes were characterized by high sugars digestibility and high grain yield, characteristics that could make biorefining of wheat straw profitable.

The EU climate package “Fit for 55” - a double-edged sword for Europeans and their forests and timber industry

The “Fit for 55” climate package adopted by the EU is intended to prepare the way for the EU's climate neutrality in 2050. It contains measures affecting the forestry and timber sector. We evaluate three instruments: the proposal for a New EU Forest Strategy for 2030, the EU Renewable Energy Directive and the Land-use, Land-Use Change and Forestry Regulation with regard to their implications for sustainable forest management. The demands that the three instruments impose on forest management are not coherent and are dominated by ecological aspects as well as by the intention to increase the forest C-pool. As they lack a holistic view, they do not meet the requirements of multifunctional, sustainable forest management.

Building a Common Support Framework in Differing Realities—Conditions for Renewable Energy Communities in Germany and Bulgaria

The revised EU Renewable Energy Directive first introduced renewable energy communities into the EU policy framework and requires Member States to implement a support framework for them. Given the broad scientific evidence showing the benefits of community energy for a just energy transition, a successful implementation across all Member States is essential. However, the preconditions for developing support frameworks differ largely between EU nations, as some countries have long-term experiences with supporting renewable energy communities (i.e., Germany and Denmark), while in other Member States, renewable energy communities are notably non-existent (i.e., Eastern European nations). With the purpose of providing scientific evidence to support the development of a policy framework for renewable energy communities in Eastern European Member States, this article compares key factors for the development of such communities in Bulgaria and Germany, combining a literature review with expert interviews to collect primary information on Bulgaria. A country analysis puts these factors into the contexts of both countries, while a cross-country comparison demonstrates that there are significant gaps in the support framework of Bulgaria, although these gaps are, to a lesser extent, also present in Germany. We discuss these shortcomings, derive policy recommendations and identify further research needs.

Bioethanol from autoclaved municipal solid waste: Assessment of environmental and financial viability under policy contexts

Globally, 2.01 billion tonnes of municipal solid waste (MSW) were generated in 2016, about 37% of which was disposed of into landfills. This study evaluates the environmental and financial viability of producing ethanol from autoclaved MSW via fermentation. Experimental screening of four different microorganisms (i.e., S. cerevisiae, Z. mobilis, E. coli, and S. pombe) and process modelling indicate that MSW-derived ethanol can significantly reduce greenhouse gas emissions relative to gasoline (84% reduction following EU Renewable Energy Directive accounting methodology, and by 156–231% reduction following the US Energy Independence and Security Act methodology). Utilisation of wastes for biofuel production in the UK benefits from policy support and financial support for renewable fuels (Renewable Transport Fuel Certificates). Financial analysis highlights that microorganisms achieving higher ethanol yield and productivity (S. cerevisiae and Z. mobilis) can achieve financial viability with higher cumulative net present value than E. coli, S. pombe. However, the positive net present value can be achieved primarily due to the benefit of gate fees received by diverting wastes to autoclave and ethanol production (64% of total revenues), rather than from revenues from ethanol sales (7% of total revenues). Key process improvements must be achieved to improve the financial viability of ethanol production from MSW and deliver a clear advantage over waste incineration, specifically improving hydrolysis yield, reducing enzyme loading rate and, to a lesser extent, increasing solid loading rate. The results provide significant insights into the role of policy and technology development to achieve viable waste-to-biofuel systems.

Assessing the Sustainable Development and Renewable Energy Sources Relationship in EU Countries

In the context of the 2030 Agenda for Sustainable Development, by adopting the EU Renewable Energy Directive and the European Green Deal, the European Union aims at an extremely ambitious goal to become climate neutral by 2050. This goal involves a massive investment plan to support this initiative, but also to reduce disparities between Member States, in order to transform the Union into a modern, resource-efficient, and competitive economy. The main objective of this paper is to investigate the sustainable development and renewable energy sources relationship in EU countries from a new perspective. Based on Eurostat available data and with the help of hierarchical clustering analysis, the Member States were divided in 2019 into five clusters, highlighting the key characteristics of the selected variables. The results of this research revealed high-performing groups of countries, as well as countries that need increased attention and additional support to become more efficient in achieving their sustainable development goals and renewable energy source targets.

The EU electricity market: renewables targets, Tradeable Green Certificates and electricity trade

Several EU member states have introduced national systems of Tradable Green Certificates (TGCs), which stipulate the percentage of total energy consumption to be obtained from renewable sources. The new Renewable Energy Directive sets a binding EU-wide target of 32% but without imposing legally binding national targets. To assess incentives for the choice of national percentage requirements we develop a two-country, Cournot duopoly model of the electricity market, with one green and one black supplier in each country. We show that nationally determined percentage requirements do not align with the EU-welfare maximizing renewable energy target due to cross-country externalities arising from trade in electricity and the market price of TGCs, and examine the direction of misalignment. Our results cast doubts on the feasibility of EU renewable energy policy in the absence of binding national targets.

Biomass Sea-Based Supply Chains and the Secondary Ports in the Era of Decarbonization

One of the tools to attain the goal of climate-neutrality by 2050 by the European Union is increasing the share of renewable energy sources (RESs) in the energy mix of member states. A major part of the future bioenergy mix is to be played by biomass. As many hazards have been pointed out when using forest biomass, particular attention is paid to the potential of agro biomass. However, as agro biomass is sourced mostly locally, the supply may not be sufficient to meet the growing demand. Therefore, international trade (including overseas) might become increasingly important to meet the EU renewable energy targets. In this context, it is seaports that may play a major part in developing biomass supply chains. The main purpose of the article is to fill the research gap by identifying the pros and cons for the development of biomass sea-based supply chains through secondary ports and specifying their relevance from the perspective of major stakeholders in the context of decarbonization processes. The supplementary purpose of the study was the verification of the environmental sustainability of biomass sea-based supply chains through secondary ports versus land transport (carbon footprint). This study applied the single case study method (the case of the secondary port in Szczecin). The case study strategy involved qualitative and quantitative research techniques. Our research study showed that (1) overseas agro biomass (wastes and residues) may become a significant tool in the process of decarbonization of economies that are heavily reliant on coal as a transition fuel and as a stable RES in the structure of the future energy mix; and (2) biomass sea-based supply chains may be an attractive alternative for secondary ports affected by negative outcomes of decarbonization. However, a dedicated biomass terminal would make the secondary ports more attractive for this type of cargo. A biomass terminal may provide sufficient port service efficiency and enable harmonization of deliveries. Additionally, the carbon footprint analysis performed in this study has shown that biomass sea-based supply chains generate lower CO2 emissions than alternative land deliveries.

Solar Prosumers in the German Energy Transition: A Multi-Level Perspective Analysis of the German ‘Mieterstrom’ Model

The expansion of photovoltaics in German cities has so far fallen short of expectations. The concept of ‘tenant electricity’ (‘Mieterstrom’ in German), in which tenants of a building are supplied with solar power produced on site, offers great potential here. A study on behalf of the German Federal Ministry for Economic Affairs and Energy estimated the number of tenant households with good conditions for solar tenant electricity at 3.8 million. At the same time, the federal tenant electricity promotion scheme has been in place since 2017, but only about 1% of the annual budget has been claimed. The aim of this study is to identify the barriers for and drivers of diffusion of the tenant electricity model. To this end, a qualitative document analysis and a range of semi-structured expert interviews have been conducted. The theoretical framework used to guide the analysis is the multi-level perspective. The main barrier found for tenant electricity diffusion is the legal framework on the regime level, which also leads to high transaction costs of implementing tenant electricity. A social barrier is the inertia of some residents to actively concern themselves with their electricity supply and switch to a tenant electricity contract. Among its drivers are long-term trends such as the increasing electricity demand in urban areas, technical developments like blockchain technology and the increasing deployment of smart meters, and the EU Renewable Energy Directive. As long as the restrictive legal framework prevails, the further diffusion of tenant electricity will remain limited.

Sustainability or protectionism in palm oil trade: The case (DS593) of Indonesia vs. the EU

Abstract: This paper examines the case DS593 to understand whether the developments in question represent an attempt to further well-justified policy objectives relating to sustainability or represent protectionism in disguise. DS593 came as Indonesia’s reaction to the EU Renewable Energy Directive II (RED II) that limits and bans palm-oil imports for the “foreseeable future”. Indonesia’s strong economic dependence on palm oil exports led it to look at the justification of RED II critically and thus to highlight some inconsist- encies. These inconsistencies center around the EU’s definition of high and low Indirect Land Use Change (ILUC) risk biofuels. A review of already existing literature on the subject, in combination with the actual WTO agreements were studied to query the issue. It is argued that further deliberation is needed on the side of the EU on what constitutes high or low ILUC risk and on other biofuels apart from palm-oil which are considered unsustainable for EU regulations to not be considered protectionist. Keywords: biomass fuel, palm-oil, WTO, international trade. JEL Classification: Q2, Q270.

Considerations on Potentials, Greenhouse Gas, and Energy Performance of Biofuels Based on Forest Residues for Heavy-Duty Road Transport in Sweden

This case study investigates the potentials, greenhouse gas (GHG), and energy performance of forest residue biofuels produced by new and emerging production technologies, which are commercially implemented in Sweden for heavy transport. The biofuel options included are ethanol (ED 95), hydro-processed vegetable oil (HVO), and liquefied biogas (LBG) produced from logging residues in forestry and sawdust generated in sawmills. The calculated life cycle GHG emissions, based on the EU Renewable Energy Directive calculation methodology, for all three pathways are in the range of 6–11 g CO2eq./MJ, corresponding to 88–94% GHG emission reductions as compared to fossil fuel. Critical parameters are the enzyme configuration for ethanol, hydrogen supply systems and bio-oil technology for HVO, and gasifier size for LBG. The energy input is ranging from 0.16 to 0.43 MJ/MJ biofuel and the total conversion efficiency from the feedstock to biofuel, including high-value by-products (excluding heat), varies between 61 and 65%. The study concludes that the domestic biofuel potential from estimated accessible logging residues and sawdust is equivalent to 50–100% of the current use of fossil diesel in heavy-duty road transport in Sweden, depending on the biofuel production technology selected and excluding energy by-products. Thus, an expansion of forest-based biofuels is a promising strategy to meet the ambitious climate goals in the transport sector in Sweden.

The role of environmental taxes and public policies in supporting RES investments in EU countries: Barriers and mimicking effects

This aim of the paper is to investigate on the strength of EU renewable energy policies and of internal barriers to energy investments. Using a novel approach based on spatial econometric methods, the paper contributes to the debate on the effectiveness of policies supporting renewable energy investments in the EU member states. The empirical analysis is based on estimates from spatial econometric models that combines independent variables with a weighting scheme of trade linkages between member states. It allows to show how trade relationships can play a role in shaping green energy policies. In fact, technological skills are transferred together with goods and services, trade flows represent an exogenous factor correlated with green investments.

De-risking Renewable Energy Investments in Developing Countries: A Multilateral Guarantee Mechanism

Summary Mitigation of global warming requires substantial investment in electricity generation from renewable sources. A large share of new generation capacity is required in regions with adverse financing conditions. We propose a global guarantee mechanism to reduce risk premia of renewable energy investments by means of risk pooling and increased market efficiency. Policymakers could establish this mechanism by scaling up existing international risk guarantee initiatives. We estimate the net present value of overall savings at US$2018 1.5 trillion globally for investments by 2030, with the largest relative savings (between 20.5% and 22%) in Sub-Saharan Africa and the Maghreb. The savings from such a mechanism outweigh its estimated average yearly operating cost. By lowering the cost of decarbonization in high-risk countries, the proposed mechanism offers policymakers a tool to make current global mitigation pledges more achievable and enables the global community to pursue more ambitious climate action.

Environmental sustainability of biofuels: a review.

Biofuels are being promoted as a low-carbon alternative to fossil fuels as they could help to reduce greenhouse gas (GHG) emissions and the related climate change impact from transport. However, there are also concerns that their wider deployment could lead to unintended environmental consequences. Numerous life cycle assessment (LCA) studies have considered the climate change and other environmental impacts of biofuels. However, their findings are often conflicting, with a wide variation in the estimates. Thus, the aim of this paper is to review and analyse the latest available evidence to provide a greater clarity and understanding of the environmental impacts of different liquid biofuels. It is evident from the review that the outcomes of LCA studies are highly situational and dependent on many factors, including the type of feedstock, production routes, data variations and methodological choices. Despite this, the existing evidence suggests that, if no land-use change (LUC) is involved, first-generation biofuels can—on average—have lower GHG emissions than fossil fuels, but the reductions for most feedstocks are insufficient to meet the GHG savings required by the EU Renewable Energy Directive (RED). However, second-generation biofuels have, in general, a greater potential to reduce the emissions, provided there is no LUC. Third-generation biofuels do not represent a feasible option at present state of development as their GHG emissions are higher than those from fossil fuels. As also discussed in the paper, several studies show that reductions in GHG emissions from biofuels are achieved at the expense of other impacts, such as acidification, eutrophication, water footprint and biodiversity loss. The paper also investigates the key methodological aspects and sources of uncertainty in the LCA of biofuels and provides recommendations to address these issues.

More Sustainable Bioenergy by Making Use of Regional Alternative Biomass?

Bioenergy is a building block of the ongoing transformation toward renewables-based energy systems. Bioenergy supply chains are regionally embedded and need to be seen in a place-based context with specific characteristics and constraints. Using a German case study, the potential of regionally embedded bioenergy chains in the past and the future is analyzed and discussed in this paper. The analysis integrates socio-ecological data and applies sustainability criteria in a multi-criteria decision analysis (MCDA) using the Preference Ranking Organization Method for Enriched Evaluation (PROMETHEE) methodology. The case study is focused on an industrial biogas fermenter in northwestern Germany, which currently uses predominantly maize as a substrate for bioenergy. Objectives for future development according to the ambitions of the UN Sustainable Development Goals and the EU Renewable Energy Directive (RED II) discussion are set and include the involvement of the farmer as biogas plant operator and other regional stakeholders. Since the focus of the research is put on the contribution of alternative biomass, such as grass, for the optimization of bioenergy settings, the question concentrates on how different mixtures of alternative biomass can be embedded into a sustainable management of both the landscape and the energy system. The main findings are threefold: (i) bioenergy supply chains that involve alternative biomass and grass from grasslands provide optimization potentials compared to the current corn-based practice, (ii) with respect to more sustainable practices, grass from grassland and alternative bioenergy supply chains are ranked higher than chains with increased shares of corn silage, and, more generic, (iii) optimization potentials relate to several spheres of the social–ecological system where the bioenergy structure is embedded. To conclude, sustainable enablers are discussed to realize optimization potentials and emphasize the integration of regional stakeholders in making use of alternative biomass and in making regional bioenergy more sustainable.

European Union’s proxy accountability for tropical deforestation

ABSTRACT Consuming countries are increasingly holding transnational businesses accountable for environmental damage on behalf of affected communities in exporting countries. The EU Renewable Energy Directives (RED) and the EU Timber Regulation (EUTR) particularly demonstrate such an accountability-by-proxy. Both aim to prevent worldwide deforestation. However, their design and accountability logics vary considerably. Using the case of Indonesia, the article addresses the question of whether a certain accountability relationship matters for improving outcomes such as prevention of tropical deforestation. Hereby, the article contributes to a new theoretical understanding of how logics of proxy accountability are linked to narratives about agency and what inherent normative risks are. The article shows that, different from the EUTR narrative, which reaffirms standard accountability arrangements, RED presents a hybrid approach. This hybrid approach may more effectively prevent tropical deforestation, but it comes at the price of further marginalization of directly affected communities.

The role of the expert knowledge broker in rural development: Renewable energy funding decisions in Greece

Abstract Within debates on rural development, Neo-Endogenous Development has emerged as the consensus ‘best-practice’ approach. Central to this approach is the role of the Expert Knowledge Broker – the conduit that brings local and ‘extra-local’ together. This paper contests that, despite a wealth of research on this paradigm and the knowledge flows that operate within, little research has been conducted regarding the decision-making process of the Expert Knowledge Broker. However, this is arguably decisive in which type of rural development is enacted. Using the allocation of funding for Renewable Energy projects in Greece as a critical context, this paper explores the decision-making approach of experts using Analytic Hierarchical Process analysis. We find that the type of rural development enacted is contingent upon the funding decision and the balance between local and extra-local funding decisions vary depending upon heterogeneous criteria. The paper contributes to knowledge through a nuanced explanation of the role of the Expert Knowledge Broker and suggests how EU Renewable Energy policy funding decisions can become more effective.

Political conflict and climate policy: the European emissions trading system as a Trojan Horse for the low-carbon transition?

ABSTRACT Many economists, businesses, and policymakers view carbon pricing as the single best policy approach to address climate change. Such optimism, however, tends to neglect the political conflicts surrounding climate policy and the necessity to accelerate the ongoing low-carbon energy transition. To unveil these conflicts, we analyze the responses of key actors to public consultations in 2015–16 concerning the EU emissions trading system (ETS) and the EU renewable energy directive. From this, we identify a prominent policy position contending that climate policy should focus on the ETS given its purported efficiency. Some actors who share this position use the ETS as a Trojan Horse – a strategy to divert attention from, and fend off, more ambitious climate action in the form of complementary renewable energy policies. Such political strategies do not just undermine carbon pricing but impede the energy transition at large. However, we also find energy industry incumbents that express support for a much stronger ETS and more effective climate policy. Therefore, it seems that the ‘Trojan Horse strategy’ may fail and the low-carbon transition might gain increasing support from a broad range of stakeholders. Even so, we argue that any singular climate policy approach risks political capture and that a mix of policies will be necessary to accelerate the ongoing transition. Key Policy Insights Major European industry actors tend to advocate the EU ETS as the primary climate policy instrument. Some European industry actors have used the EU ETS as a Trojan Horse – to fend off strict climate action and to slow down the low-carbon energy transition. Political conflicts surrounding individual climate policies reflect much larger struggles over the direction and pace of the energy transition. Climate policy should not rely too heavily on a single instrument but rather include a mix of measures that promote both low-carbon innovation and the decline of carbon-intensive industries, technologies and practices.

Bioliquids and their use in power generation – A technology review

The first EU Renewable Energy Directive (RED) served as an effective push for world-wide research efforts on biofuels and bioliquids, i.e. liquid fuels for energy purposes other than for transport, including electricity, heating, and cooling, which are produced from biomass. In December 2018 the new RED II was published in the Official Journal of the European Union. Therefore, it is now the right time to provide a comprehensive overview of achievements and practices that were developed within the current perspective. To comply with this objective, the present study focuses on a comprehensive and systematic technical evaluation of all key aspects of the different distributed energy generation pathways using bioliquids in reciprocating engines and micro gas turbines that were overseen by these EU actions. Methodologically, the study originates from the analyses of feedstock and fuel processing technologies, which decisively influence fuel properties. The study systematically and holistically highlights the utilisation of these bioliquids in terms of fuel property specific challenges, required engine adaptations, and equipment durability, culminating in analyses of engine performance and emissions. In addition, innovative proposals and future opportunities for further technical improvements in the whole production-consumption cycle are presented, thus serving as a guideline for upcoming research and development activities in the fast-growing area of bioliquids. Additionally, the paper systematically addresses opportunities for the utilisation of waste streams, emerging from the ever increasing circular use of materials and resources. With this, the present review provides the sorely needed link between past efforts, oriented towards the exploitation of bio-based resources for power generation, and the very recent zero-waste oriented society that will require a realistic exploitation plan for residuals originating from intensive material looping.

The Synergies Between EU Climate and Renewable Energy Policies-Evidence from Portugal Using Integrated Modelling

The Synergies Between EU Climate and Renewable Energy Policies-Evidence from Portugal Using Integrated Modelling