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Domestic Hot Water and Heating

Rising demand for solar heat in large buildings and industry

Submitted by Baerbel Epp on June 6, 2018
SHW 1By the end of 2017, the market for solar heating and cooling had grown by 472 GWth, which again made it the largest for solar energy in the world. The one for photovoltaic systems gained 402 GWp to become the second-largest, and 5 GWel was enough for concentrating solar power to rank third, according to the latest Solar Heat Worldwide report. The report also highlights the rising use of megawatt-class solar heating and cooling solutions for large public and residential buildings, as well as factories. It was launched at the end of May by the IEA Solar Heating and Cooling Programme (IEA SHC). Lead author is the Austrian research institute AEE INTEC.
Source of all figures: Solar Heat Worldwide

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

A survey of the global market for concentrating collectors

Submitted by Baerbel Epp on June 1, 2018
Graphic: Solar PaybackConcentrating collector technologies are becoming an increasingly popular choice for customers requiring industrial heat or space heating. This year’s Renewables 2018 Global Status Report includes, for the first time, data regarding new installations of concentrating systems. Published at the beginning of June by the Paris-based REN21 network, it states that a minimum of 143 MWth was set up in 2017. The largest markets were Oman (100 MWth), China (15 MWth), Italy (14 MWth), India (2.8 MWth) and Mexico (2.8 MWth). The image shows the three technologies available for sale. 
Graphic: Solar Payback

California Solar Initiative dominated by multi-family houses

Submitted by Baerbel Epp on May 25, 2018
Source: California Public Utilities CommissionIn 2017, the California Solar Initiative (CSI) – Thermal Program supported the installation of 20,000 m² of collector area, a 20 % increase over the prior year. With 10,832 m², or four times the area installed in 2016, multi-family buildings dominated the subsidy landscape for those 12 months. The surge was a result of a temporary increase in the incentive amount, from USD 29.85 per therm displaced to USD 70, granted across the service area of Southern California Gas Company. The chart, for which data has been supplied by the California Public Utilities Commission, shows the collector area subsidised and installed from 2010 to 2017.
Source: California Public Utilities Commission

Energy efficiency funding in Bosnia and Herzegovina

Submitted by Baerbel Epp on May 11, 2018
Map: lonelyplanet.comThe Jugoslav Wars of the 1990s slowed down the rate of energy-related retrofits in the residential and public sectors of Bosnia and Herzegovina. Recently, however, the country has seen some improvement in the amount of funding available for clean heating technologies, such as solar thermal, biomass boilers and heat pumps. In early April, the European Bank for Reconstruction and Development, or EBRD for short, provided MKF Partner, a Bosnian microfinance institution, with EUR 5 million for low-interest loans and grants to make residential buildings more energy-efficient. It was the second time the EBRD had allocated funding to financial institutions in the country. Last November, EUR 17 million went to three Bosnian banks, as part of the EBRD’s Green Economy Financing Facility. 
Map: lonelyplanet.com

Solar showers for displaced people and refugees

Submitted by Baerbel Epp on April 20, 2018
Logo UNHCRThe UN Refugee Agency has begun ordering solar water heaters to improve the sanitary conditions in Ugandan refugee camps. The news ties in neatly with the first conference on Energy for Displaced People: A Global Plan of Action for Sustainable Energy Solutions in Situations of Displacement, an event which took place in mid-January in Berlin, Germany, and was attended by more than 100 delegates. The participants agreed to “lay the groundwork for the first-ever global, multi-stakeholder plan to ensure that crisis-affected people gain access to affordable, reliable, sustainable and modern energy services by 2030.”

Heat pump makes use of low-temperature solar energy for space heating

Submitted by Baerbel Epp on March 29, 2018
Markus BeslmeislWith round about four decades in business, the German-Slovak Thermosolar Group is one of the oldest solar thermal manufacturers in Europe. It began producing collectors in 1972 in Slovakia and started offering a special evacuated flat plate collector in 1997. Last November, long-time sales manager Markus Beslmeisl (see photo) acquired the remaining shares in the company from Johann Kollmannsberger. Solarthermalworld.org spoke with the new managing director about Thermosolar’s special solar heat pump system, called Duo Premium.
Photo: Thermosolar

“Need to include solar in architectural education”

Submitted by Baerbel Epp on March 28, 2018
Sylvio PodestaBrazil ranks fourth on the list of the world’s largest solar thermal markets, but very few installations have been integrated into a facade or roof. Sylvio de Podestá is the architect behind one of the buildings that have roof-integrated collectors. At this hotel in Belo Horizonte, also known as Brazil’s solar capital, the collectors are at a slope guaranteed to maximise efficiency (see image). Usually, solar systems are added during construction, long after the design stage.
Image: Sylvio de Podestá

Solar cooling increases annual solar fraction

Submitted by Baerbel Epp on February 24, 2018
Task 53 1Solar cooling could be an effective way to increase the annual solar fraction of domestic hot water production and prevent the solar system from overheating in summer. Under the aegis of the IEA Solar Heating & Cooling Programme, researchers from Task 53, New Generation Solar Cooling & Heating Systems, have written a new book, titled The Solar Cooling Design Guide: Case Studies of Successful Solar Air Conditioning Design. It includes a detailed case study of two buildings containing offices and flats in Montpellier, France. The on-site 240 m² flat plate collector system powers a 35-kW absorption chiller to achieve a 70 % solar fraction in annual hot water production (see photo). Between November and March, the system continues to provide around 40 % of the heating energy to meet hot water demand.
Photo: Tecsol/Serm
 

Thermosiphon market rebounds in Italy

Submitted by Baerbel Epp on February 16, 2018
Photo: Riccardo BattistiSystem suppliers and importers in Italy have reported significant growth in thermosiphon sales in 2017 thanks to the national support scheme Conto Termico 2.0. “Compared to the previous year, we more than doubled the number of thermosiphon units we sold in Italy in 2017, and most systems had a larger collector area because of the level of subsidies from Conto Termico 2.0,” said Export Sales Manager Andreas Andrianopoulos from Greek-based solar thermal manufacturer Cosmosolar. 
Photo: Riccardo Battisti

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