Connolly D.,University of Aalborg |
Lund H.,University of Aalborg |
Mathiesen B.V.,University of Aalborg |
Werner S.,Halmstad University |
And 6 more authors.
Energy Policy | Year: 2014
Six different strategies have recently been proposed for the European Union (EU) energy system in the European Commission's report, Energy Roadmap 2050. The objective for these strategies is to identify how the EU can reach its target of an 80% reduction in annual greenhouse gas emissions in 2050 compared to 1990 levels. None of these scenarios involve the large-scale implementation of district heating, but instead they focus on the electrification of the heating sector (primarily using heat pumps) and/or the large-scale implementation of electricity and heat savings. In this paper, the potential for district heating in the EU between now and 2050 is identified, based on extensive and detailed mapping of the EU heat demand and various supply options. Subsequently, a new 'district heating plus heat savings' scenario is technically and economically assessed from an energy systems perspective. The results indicate that with district heating, the EU energy system will be able to achieve the same reductions in primary energy supply and carbon dioxide emissions as the existing alternatives proposed. However, with district heating these goals can be achieved at a lower cost, with heating and cooling costs reduced by approximately 15%. © 2013 Elsevier Ltd.
Serrats E.M.,Renewable Energy National Center CENER |
Kovacs P.,SP Technical Research Institute of Sweden |
Kramer K.,Fraunhofer Institute for Solar Energy Systems |
Nielsen J.E.,PlanEnergi |
Nelson L.,International Association of Plumbing and Mechanical Officials IAPMO
Energy Procedia | Year: 2012
Europe, North America, Australia and other individual countries have certification and testing procedures for solar thermal equipment designed to support innovation and product development and to protect consumers from poor performance and unsafe designs. For the first time, as a result of the international collaboration under the IEA-SHC Task 43 umbrella and the working groups of Solar Keymark Network, SRCC, ISO/TC180 and CEN/TC312, it has been possible to develop a common international standard draft for solar thermal collector testing. This paper describes in detail the new ISO/DIS 9806 standard and the relevant topics which clarify and refine existing test procedures or extend their scope: including solar air heating collector testing and tracking / concentrating collector testing. The new ISO/DIS 9806 standard opens the door to a global certification scheme for solar thermal collectors, thereby helping to overcome problems resulting from many different regional certification schemes. © 2012 The Authors.
Rudra S.,University of Aalborg |
Rosendahl L.,University of Aalborg |
ASME 2011 5th International Conference on Energy Sustainability, ES 2011 | Year: 2011
Brovst is a small district in Denmark. Based on the case of Brovst, this paper analyses the role of district heating in future Renewable Energy Systems. The present use of fossil fuels in the Brovst DHP (district heating plant) represents an increasing environmental and climate-related load. So, an investigation has been made to reduce the use of fossil fuels for district heating system and make use of the local renewable resources (Biogas, Solar and Geothermal) for district heating purpose. In this article, the techno-economic assessment is achieved through the development of a suite of models that are combined to give cost and performance data for this district heating system. Different local fuels have been analyzed for different perspectives to find the way to optimize the whole integrated system in accordance with fuel availability and cost. This paper represents the energy system analysis mode energyPRO which has been used to analyses the integration of large scale energy system into the domestic district heating system. A model of the current work on the basis of information from the plant (using fossil fuel) is established and named as a reference model. Then different solutions are calculated for various local fuels in energyPRO. A comparison has been made between the reference model and the basis for individual solutions. The greatest reduction in heat price is obtained by replacing one engine with a new biogas where heat production is divided by 66% of biogas, 13% natural gas engines and 21% natural gas boilers. Copyright © 2011 by ASME.
Soerensen P.A.,PlanEnergi |
Jensen M.V.,PlanEnergi |
Strojarstvo | Year: 2012
The SUNSTORE concept has as its core content a large solar thermal plant and a long term heat storage covering a large part of the energy consumption in a district heating system. Other renewable energy production plants can be added to the solar collectors and the storage (heat pumps, biomass or natural gas fuelled combined heat and power plants etc,) making it possible to cover both district heating and cooling systems with up to 100% renewable energy. In Marstal, DK, the SUNSTORE 4 project, supported by EU 7th Framework Program has been implemented during 2011 and 2012. This document presents the SUNSTORE concept, design of the project in Marstal, experiences with the implementation of the storage in Marstal and variations and future development of the concept.
Energy Procedia | Year: 2012
Large solar thermal systems have proven to be cost effective in several cases - and the combination of a large solar system with long term storage and also heat pump seem to be very attractive in an efficient modern energy system due to: • flexibility when supplying combined heat and power production in a liberal market for electricity • potential for obtaining very high solar and renewable fractions of supply. The use of solar thermal in connection with district heating is far behind (relatively only one tenth of) the use of solar thermal in individual houses - even though it is in most cases much cheaper to supply solar energy centrally to a district heating network, than to supply solar energy to individual houses. In Denmark right now "an explosion" in numbers of large scale solar district heating systems is seen. Not because of special subsidy schemes - but simply because the systems in many cases are competitive with gas and biomass based district heating systems. The main overall objective of the IEA-SHCi Task 45 is to assist in a strong and sustainable market development of large solar heating and cooling systems. The task will focus on the "MW-size" systems for district heating and cooling applications. The general outcome of the Task will be increased use of cost effective, well designed and well operated large scale solar thermal systems throughout the world - and a strong network of experts and professionals in the field. Main deliverable will be a "Design Handbook for Large Solar Heating/Cooling Systems". © 2012 The Authors.