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District Heating

Switzerland: PVT System Output Reaches 330 kWhth/m² on Top of 163 kWhel/m²

Submitted by Baerbel Epp on July 29, 2016
PVT OberfeldCrystalline PV modules utilise only 12 to 15 % of the incoming sunlight, while the rest is usually treated as waste heat. Hybrid solar panels, also called PVT elements, will channel this unused low-temperature heat, as shown by a large-scale demonstration plant in Switzerland. The PVT system’s 1,300 m² are used to regenerate a borehole field in a Swiss multi-family housing area. Monitoring data of the system’s first year in operation between August 2014 and July 2015 resulted in an annual thermal yield of 330 kWh/m² in addition to the 163 kWh/m² of electricity produced by the PV modules, according to a statement made by researchers from the Swiss SPF – Institute of Solar Technology earlier this year. The borehole field serves as the energy source for the heat pumps, which supply hot water all-the-year and space heating in winter. Most probably, the recommendations that the SPF researchers made to optimise the system in a paper published in May 2016 will even lead to a higher thermal yield during the installation’s second year. 
Photo: SPF Rapperswil
 

Top District Heating Countries – Euroheat & Power 2015 Survey Analysis

Submitted by Baerbel Epp on July 1, 2016
Euroheat & Power LogoSolar district heating has enjoyed increasing attention from all across Europe and China, triggered by Denmark’s enormous growth rates in the field. Until the end of last year, the Scandinavian country had seen 577 MW of solar thermal power fed into 79 district heating networks mostly run by municipalities. There are another 364 MWth in the pipeline, scheduled for the beginning of this year. To identify the countries with the largest potential for solar district heating, it is worth taking a closer look at the country-by-country statistics of the biennial Euroheat & Power publication, whose most current version is from March 2015 and includes the key market indicators. Euroheat & Power, the association for district heating and cooling, is headquartered in Brussels and has 11 full-time staff.
 

Denmark: Solar Concentrating Systems to Offer Wide Array of Uses

Submitted by Baerbel Epp on June 20, 2016
Aalborg Tars InaugurationAt present, the Danish turnkey supplier of concentrating solar systems, Aalborg CSP, has two more large projects under construction. Both installations – one for Danish district heating company Brønderslev Forsyning and one for Australian vegetables producer Sundrop Farms – cover electricity and heat demand at their sites. Yet another first-of-its-kind project was inaugurated in August 2015 in the Danish village of Tårs (see photo), 30 km north of Aalborg. It entailed 4,039 m² of parabolic trough collectors and a preheating flat plate collector field of 5,972 m². Simulations have pointed to a 31 % coverage of annual heat demand even without seasonal storage, since overheating in summer can be avoided by moving the parabolic trough collectors out of focus. Aalborg CSP is an experienced planner of steam and boiler systems and has been offering concentrating solar solutions since 2007. 
Photo: Tårs
 

Austria: Decision on Operating Company for Big Solar Graz Expected Soon

Submitted by Baerbel Epp on June 17, 2016
Gleisdorf Solar 2016“Large-scale solar thermal systems in the GW range – an insignificant niche market or the future for solar thermal?” was the official title of a panel discussion at the Gleisdorf Solar conference in Austria in early May. The most important question was: What will be next for the planned 350 MWth solar district heating system called Big Solar in the Austrian city of Graz? “The challenge was to adapt the Danish district heating solutions to Austrian conditions,” emphasised the project’s initiator, Christian Holter (right), Managing Director of S.O.L.I.D. Meanwhile, Christian Stadler (left), Managing Director of one of Arcon-Sunmark’s subsidiaries, Arcon-Sunmark Germany & Austria, represented the company that has stated his own interest in realising Big Solar.
Photo: AEE INTEC
 

China: Arcon-Sunmark and Sunrain Establish Joint-Venture for Large Projects

Submitted by Baerbel Epp on June 10, 2016
Sunrain Arcon Joint VentureA new joint venture founded in Beijing, China, on 31 May aims at offering large-scale solar heating solutions on the Chinese market. The country’s market leader, Jiangsu Sunrain Solar Energy, and Arcon-Sunmark, a Danish turnkey large-scale system provider, joined forces to establish Arcon-Sunmark Large-Scale Solar Systems Integration Co., Ltd., headquartered in Beijing. The photo shows (from left) Xinjian Xu, Founder and Chairman of the Board of Jiangsu Sunrain Solar Energy, Torben Sørensen, Group Executive Officer of VKR Holding, the owner of Arcon-Sunmark, and Mads Kann-Rasmussen, Board Member of VKR Holding, who represents the family behind VKR.
Photo: Arcon-Sunmark
 

Austria: Award-Winning Energy Service Company Publishes ESCO Model Fact Sheets

Submitted by Baerbel Epp on May 26, 2016
Contracting AwardEnergy Service Companies (ESCO) have become pioneers in the development of financing and operating models for various energy sector customers. Every two years, the so-called Contracting Award highlights exemplary ESCO projects in Germany (“Contracting” is the German word for Energy Service Contracts). For the first time since the launch of the awards in 1997, the jury members from the magazine Energy & Management and the German Heat & Power Association, AGFW, presented one of these awards to a solar thermal ESCO. On 16 April, Christian Holter (third from left), Managing Director of Austrian turnkey system supplier S.O.L.I.D., was presented with the second prize for its solar energy supply contract with a district heating company in the Austrian city of Graz. The company published Tech Sheets and Fact Sheets about ESCO models as part of the IEA’s Solar Heating and Cooling programme’s Task 45, Large Scale Solar Heating and Cooling Systems (see the attached documents).
 

Italy: First-Year District Heating Yield Better than Expected

Submitted by Baerbel Epp on May 20, 2016
Output VareseThe first and so far unique solar district heating plant in Italy completed its first year in operation in mid-May this year. According to metering by the operator of the 990 m² collector field, utility Varese Risorse, output was significantly higher than expected. The chart shows the total output measured over almost 12 months: It was 13 % higher than the target figure. The solar district heating plant was developed and installed by a newly founded Italian company, SDH Energy, which also guaranteed the solar yield (red line).
Chart: Varese Risorse/SDH Energy
 

Germany: Construction Starts on 2,230 m2 Solar Field in Chemnitz

Submitted by Baerbel Epp on May 19, 2016
On 11 May, construction work started on a new 2,230 m2 ground-mounted collector array (2,090 m2 of aperture area) in the city of Chemnitz. The project is said to be completed within about a month, and the plant is scheduled to come into operation a few weeks later. The collector field is expected to supply almost 5 % of the heat provided by the new district heating grid for the Brühl housing development near the city centre. 
Photo: inetz
 

Bulgaria: Solar District Heating Becomes Realistic Option

Submitted by Baerbel Epp on April 28, 2016
 
It seems paradoxical: Although abundant sunlight is usually associated with southern Europe, the most solar district heating (SDH) plants in Europe are located in the north, mainly in Denmark, but also in Norway and Sweden. Milan Rashevski, a Bulgarian architect from the non-governmental Institute for Zero Energy Buildings (IZEB), now intends to establish this kind of energy supply in his country too. “We have round about 25 % more sunshine than Denmark, so what works there should be possible here as well,” he said. With the support of Danish organisation State of Green, Rashevski and his IZEB colleagues visited some of the largest SDH plants in Denmark last year.
 

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