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New technologies for solar cooling in industry

Submitted by Baerbel Epp on September 14, 2018
Photo: HyCool ProjectThe aim of just launched HyCool is to present, in the form of two demonstration plants, new solar heating and cooling technologies for industrial use. The combination of state-of-the-art Fresnel collectors by Austrian supplier Fresnex with custom-built hybrid adsorption-compression chillers by German-based Fahrenheit will broaden the temperature range, creating a portfolio of applications to increase the use of solar heating and cooling for industrial processes.
Photo: Fresnex

Solar Keymark Network gets new chairman

Submitted by Baerbel Epp on August 7, 2018
Andreas BohrenThe Solar Keymark Network meeting held in Spain this March saw a new chairman, Andreas Bohren (see photo), leading a reshaped organisation. From now on, the members of the network, also known as SKN, will have a physical meeting in spring and an online one in autumn. Votes can be held in between and in 2019, the former head of the CEN/TC 312 committee, Vassiliki Drosou from Greece, will replace Jan Erik Nielsen from Denmark as the manager of SKN. Solarthermalworld.org spoke with Bohren, who works at the Swiss-based SPF – Institute of Solar Technology, to learn more about his objectives.
Photo: Solar Heat Europe

Dish technology in Asia

Submitted by Baerbel Epp on July 3, 2018
Photo: Megawatt SolutionsA webinar that took place on 22 May put the spotlight on concentrating dish systems manufactured in India and Pakistan. Titled Concentrating Solar Heat Solutions Available Today for Carbon-Free Industrial Heat and Steam Generation and organised by Spanish-based consultancy ATA Insights, it highlighted the main advantages of these dishes: flexibility and low space requirements. The photo shows a solar process heat installation at a dairy in India. A recording of the entire event and the presentations that were held are available online.
Photo: Megawatt Solutions

Optimised control strategy for solar district heating in Italy

Submitted by Baerbel Epp on June 20, 2018
Photo: Linea Reti e ImpiantiDespite its small size, the solar district heating system in Lodi, close to Milan, is one of few in Italy to feed surplus heat into a local network. In March 2017, Linea Reti e Impianti, the public utility based in this city of 45,000, started buying heat produced by a 192 m² solar thermal installation. The system is owned by Sporting Lodi, a public-private partnership that operates the local sports centre, which includes a swimming pool (see photo). Marco Calderoni, a researcher working at the Politecnico di Milano, and his colleagues have recently suggested using a new approach to reduce the supply temperature in the solar circuit to increase performance. This article is based on a presentation given by Calderoni during the 5th International Solar District Heating Conference in Graz in April. 
Photo: Linea Reti e Impianti

Green hotel in Italy’s mountains

Submitted by Baerbel Epp on June 5, 2018
Photo: Luca Degiorgis / DegmarSolar thermal performs well even in high-mountain areas during winter season. The installation shown in the photo is proof that combining solar and other renewable technologies, such as biomass boilers and a solar-assisted heat pump, results in a synergy that can be very productive. The renewable heating system may have had a price tag of EUR 150,900 but uses innovative solutions, including phase change materials, to store thermal energy and saves EUR 16,000 per year.
Photo: Luca Degiorgis / Degmar

PVT increasingly used for net zero energy buildings

Submitted by Baerbel Epp on May 31, 2018
Photo: ISFH, IEA SHC Task 60A rising number of manufacturers and suppliers in Europe are offering combined photovoltaic and solar thermal systems, also known as PVT units. This was one of the main messages of the International Workshop on the Status of PVT Systems, organised by Fraunhofer ISE on 16 May 2018 in Freiburg. The event, held as part of IEA SHC Task 60, Application of PVT Collectors and New Solutions in HVAC Systems, featured 15 speakers, who updated 63 attendees working in industry and science on the progress made with PVT products and research.
Photo: ISFH, IEA SHC Task 60

On-site collector testing: new standard in development

Submitted by Baerbel Epp on May 17, 2018
Photo: Riccardo BattistiOnce a large solar field is set up at its designated location, what tests can be conducted to show that it performs as expected? Soon, the IEA Solar Heating & Cooling Programme may have an answer to this question, as it is working on internationalising Denmark’s testing procedure. No decision has been made on whether the procedure will become part of a full-fledged standard or be turned into a technical specification. 
Photo: Riccardo Battisti

How to identify suitable areas for SDH

Submitted by Baerbel Epp on May 9, 2018
Chart: Hamburg InstitutThough the availability of areas for large solar district heating plants remains a major point of contention, there are ways to expand the market. They include detailed local heat plans, the use of unconventional, e.g., polluted or contaminated, areas, and awareness raising among public and private stakeholders. A webinar organised as part of the Horizon 2020 project SDHp2m…from Policy to Market put a spotlight on these topics in February. A recording of the session is available online.
Chart: Hamburg Institut
 

Building-integrated solar envelopes: barriers to deployment

Submitted by Baerbel Epp on May 2, 2018
Solar FacadeActive and passive solar systems integrated into building envelopes are key to combatting climate change. However, there are many barriers which confine current solutions to the demonstration stage and prevent them from going mainstream. To increase the size of the market, researchers have examined these barriers as part of Task 56, Building Integrated Solar Envelope Systems for HVAC and Lighting, under the auspices of the IEA Solar Heating & Cooling Programme. Their report will not be available until September 2018, but this article contains a summary of the main conclusions.
Photo: Riccardo Battisti

Sweden: Pioneer of solar district heating

Submitted by Baerbel Epp on April 13, 2018
Chart: Sven WernerWhen it comes to district heating, Sweden has made the switch from fossil fuels to biomass and waste heat (see chart). As early as 2015, biomass provided 46 % of the energy in district heating networks across the country, followed by 24 % from waste incineration and 8 % from industrial excess heat. Fossil fuels came only to about 7 % of the around 175 petajoules, or PJ, produced in Sweden in 2015 (latest data available). These percentages, and the chart, were taken from a 2017 paper titled District heating and cooling in Sweden, written by Sven Werner, Professor Emeritus at the Swedish Halmstad University. Sweden is one of the participating countries of Task 55 Towards the Integration of Large SHC Systems into DHC Networks of the IEA Solar Heating and Cooling programme. The researchers plan to publish a report with country portraits of selected solar district heating markets in 2019. 
Chart: Sven Werner

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