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PublicationFactors affecting the calculation of wind power potentials: A case study of China( 2021)
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PublicationIntroduction to the special issue: Financing instruments to promote energy efficiency and renewables in times of tight public budgets( 2013)
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PublicationAnalysis of harmonisation options for renewable heating support policies in the European Union( 2013)Best practice policy design and harmonisation of support schemes for electricity from renewable energy sources (RES-E) within the European Union have been discussed controversially for years. In contrast, policies for improving renewable heating (RES-H) penetration in the European Member States and options for best practice instruments are still being developed. The objective of this paper is to analyse different levels of policy harmonisation for target compliance and the economics of renewable heating and cooling. After presenting the degree of RES-H policy harmonisation resulting from Directive 2009/28/EC, a quantitative assessment is performed of the costs and benefits of different harmonisation scenarios. This selects the obligation to use renewable heating in buildings as the common policy instrument against which the effects of harmonisation are analysed. The paper shows that economic benefits can result from implementing best practice design options for use obligations in EU Member States.
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PublicationState budget independent, market-based instruments to finance renewable heat strategies( 2013)At present, expanding the use of renewable energy sources for heating (RES-H) relies predominantly on publicly funded support instruments. As these are subject to subsidy cuts and suspensions, these instruments do not provide long-term security for investors and technology suppliers. Although feed-in tariffs and quota-based systems are the major support schemes for renewable energy sources in the electricity sector, similar policy designs have not been applied to RES-H. This paper presents and evaluates three different policy instruments which have the potential to finance RES-H without using public funds: a physical quota system for biomass, a technology-based quota system (Portfolio Model) and a remunerationbased system (Premium model). The assessment suggests that while the Portfolio Model and the Premium Model are both promising policies to enhance RES-H deployment, there is greater acceptance among stakeholders for the Premium Model.
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PublicationMarket integration of renewable electricity generation - the german market premium model( 2013)
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PublicationCoordination or harmonisation? Feasible pathways for a european res strategy beyond 2020( 2013)With Directive 2009/28/EC, the European Parliament and Council have laid the grounds for the policy framework for renewable energy sources (RES) in the European Union until 2020. The aim of this paper is to look more closely beyond 2020, well in advance, contrasting and analysing potential RES policy options that are currently being discussed. Generally the assessment includes RES in all energy sectors but a topical focus is put on renewable electricity, specifically within the discussion of policy options for a harmonisation of RES support. The results of the policy assessment indicate that cooperation and coordination among Member States appear beneficial to tackle current problems in RES markets, and fruitful for the period beyond 2020. By contrast, "simplistic approaches" to RES policy harmonisation, for example via a uniform RES certificate trading, are not suitable to ensure substantial future RES growth.
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PublicationFruitful symbiosis: Why an export bundled with wind energy is the most feasible option for North African concentrated solar power( 2011)
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PublicationStatus and perspectives of renewable energy policy and deployment in the European Union - What is needed to reach the 2020 targets?( 2011)This article evaluates the status of current RES deployment, policies and barriers in the EU-27 member states and compares it to the required to meet the 2020 targets. The evaluation relies strongly on the quantitative deployment status and policy effectiveness indicators. European RES deployment and policy has progressed strongly in recent years, but the growth here has been mainly driven by effective policies in a small or medium number of top runner countries. Across Europe, the highest average policy effectiveness over six years was reached for onshore wind (4.2%), biofuels (3.6%) and biomass electricity (2.7%), while in the heat sector, all technologies score below 2%. Comparing the recent progress to the required growth for meeting the 2020 target, it appears that some countries largely exceed the interim targets of the RES Directive 2009/28/EC. Despite this, Europe will need additional policy effort to reach the 2020 target. Critical success factors include imple menting effective and efficient policies that attract sufficient investments, reducing administrative and grid related barriers, especially in currently less advanced countries, upgrading the power grid infrastructure, dismantling financial barriers in the heat sector, realising sustainability standards for biomass, and lowering energy demand through increased energy efficiency efforts.
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PublicationEfficiency and effectiveness of promotion systems for electricity generation from renewable energy sources - lessons from EU countries( 2011)Currently, a wide range of strategies is implemented in different countries to increase the share of electricity from renewable energy sources (RES-E). A still controversial discussion is whether quantity-driven (like Tradable Green Certificates (TGCs) based on quotas) or price-driven (like feed-in-tariffs (FIT)) instruments lead to preferable solutions for society. The core objective of this paper is to compare the perspectives of quota-based certificate trading systems for an efficient and effective increase of RES-E with FIT. The major results of this analysis are: (i) The success stories of growth in RES-E in EU member states in recent years has been triggered by FIT implemented in a technology-specific manner at modest costs for European citizens; (ii) At present, TGC systems in most countries applied show a low effectiveness with respect to RES-E deployment of less mature technologies such as solar PV (with improving tendencies in e.g. the UK or Italy with respect to certain technologies); (iii) Compared to short term trading in TGC markets the intrinsic stability of FIT systems appears to be a key element for success; (iv) Hence, currently a well-designed (dynamic) FIT system provides a certain deployment of RES-E in the shortest time and at lowest costs for society.
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PublicationA historical review of promotion strategies for electricity from renewable energy sources in EU countries( 2011)The core objective of this paper is to elaborate on historically implemented promotion strategies of renewable energy sources and the associated deployment within the European electricity market. Hence, at a first glance, the historic development of renewable energy sources in the electricity (RES-E) sector is addressed on Member State and on sectoral level as well as consequently discussed according to available RES-E potentials and costs. The specific focus of this paper, are promotion strategies for RES-E options as they are the key driver of an efficient and effective RES-E deployment. Therefore, the paper depicts the main types of different promotion schemes and their properties. Additionally, several cases studies of different European Member States show an in-depth analysis of the different RES-E promotion schemes. In this context, special emphasises are put on the question of effective and efficient promotion scheme designs of different RES-E technologies. Generally, conducted research led to the conclusion, that technology specific financial support measures of RES-E performed much more effective and efficient than others did. Hence, it is not all about the common question of feed-in tariffs vs. quota systems based on tradable green certificates, but more about the design criteria of implemented RES-E support schemes.
