Heat Storage

  • Webinar: Compact Heat Storage- Recording and Slides

    Date: Friday, January 23rd 2009 - 15:00 - Central European Time (Brussels)
    Duration: 1 hour Moderator: S Ferreira
    Title: Compact Thermal Energy Storage
    Technologies: Status, Applications and Developments...

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  • More Research Needed for New Storage Materials

    If solar energy is to be the primary or only source of heat for houses in the future, there will arise a need for storing it more efficiently. Materials have to be found that are able to hold more energy than water, but with less volume and higher loss. Task 32 of the International Energy...

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  • Fixed temperature thermosiphon system from India

    Fixed temperature thermosiphon system from India

    Solar water heater from India: The collector manufacturer Akson's Solar Equipments has launched the Akson Maestro system with the hot water tank positioned below the collector. Photo: Akson's Solar

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  • Is there enough sunshine in all regions?

    Solar thermal systems produce hot water whether the system is installed in Sweden, Germany, India, Tunisia or South America. The annual yield depends on the application (domestic hot water, pool heating, space heating), the local climatic conditions and system dimensioning (high or low solar fraction). The annual collector yield per square metre of collector area lies around 250 kWh/m2 for unglazed pool heating systems, 400 kWh/m2 for solar combi systems for hot water production and space heating in northern regions, and up to 700 kWh/m2 for installations in southern European regions used only for hot water preparation.

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  • Which are the major solar thermal markets worldwide?

    By far the largest solar thermal market in the world according to newly installed solar thermal capacity per year is China. In 2008, around 21 GWth (30 million m2) were sold in China, which was around 80 % of the world global solar thermal market.

    In Europe, Germany – the second biggest market in the world – is dominating. With its newly installed capacity of 1.13 GWth (1,615,000 m2) in 2009, the country reached a market share of 38 % within Europe.

    Position three is held by Turkey, a dynamic solar thermal market which is estimated at 785 MWth ( 1,120,000 m2).

    Besides these front-runners, India, Brazil, Israel, Austria, Greece, USA, Japan, France, Italy, Spain and Australia are countries which reached a market volume of greater than 70 MWth (100,000 m2) in 2007.

    Further information:

    Solarenergie 2007, Study by the Swiss bank Sarasin, November 2008 (Only available in German)

    Solar thermal Markets in Europe. Trends and Market Statistics 2009, Study by European Solar Thermal Industry Federation (ESTIF), June 2009 (see the following link)

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  • Renewable Energy Technology Roadmap up to 2020

    Published in January 2007, by EREC (European Renewable Energy Council), the document shows the ambitions of the European Renewable Energy Industry to reach the EU targets for 2020 for different sectors, including electricity, heating & cooling, and biofuels.
    It provides roadmaps for each sector, predicting its development and the conditions under which progress can be made.

    Nowadays, in the EU-25, fossil fuels contribute to almost 80 % of the primary energy demand. The target of 20% renewable energy use by 2020 seems to be quite challenging, especially if the appropriate legal framework and incentives are not put in place.

    This EREC report estimates that the contribution to the total primary energy demand will only be roughly 8% in 2010, slightly more than 12% in 2020 and only 12% in 2030 which is very far away from any target set. As for the energy supply, scenarios are more positive: 21% in 2020 if the policy developments and instruments continue progressing.

    If different and specific targets were set, then it would be easier to achieve the given targets. According to EREC, the Renewable Energy roadmap should consist of an overall target for 2020, followed by targets for the different sectors (electricity, heating/cooling, biofuels). Setting up individual targets for the different sectors would fasten the process, given that not all sectors are in the same stage of development.

    As what regards the solar thermal market, this report estimates that more funding on R&D would enable a broader adoption of solar thermal solutions for heating, cooling and storage.

    Go to Document

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