This solar district heating system of 941 m2 in Cadaujac is an innovative and eco-friendly project, first of this type in France, develop by our customer AbSolar. The solar production is linked to a geothermal seasonal storage which lead this new neighbourhood to received 100% of renewable heat for their need in heating and hot water.
Savosolar has been responsible of the main part of the solar plant as part of an EPC contract, including the design and then the supply and installation of the solar field, the piping and the solar station with its automation system, as a turnkey solution. The 510 MWh of annual solar production allow to avoid around 100 tons of CO2 emission for such a heating need. With this project, Savosolar maintain is leading position on the French market in the supply of turnkey solar thermal plant for district heating.
This disruptive technology develops and handle by AbSolar is a forerunner project showing the possibility to reduce significantly our carbon footprint for the daily needs of heat and should help us to fight climate changes, while ensuring a mainly fixed cost of energy over 20 years for the inhabitants of this kind of residential district.
As a general contractor, Savosolar built a solar thermal system on behalf of Fernwärme Ettenheim GmbH for the largest possible solar feed-in into the existing district heating network. 112 pieces Savo 15 SG-M large collectors generate fuel-free healthy heat, which is temporarily stored in two 100 m³ buffer storage tanks.
This also allows the operating hours of the CHP and the biomass boiler to be optimized. The scope of delivery included the fence and video surveillance system, as well as the creation of a meager meadow to enrich local biodiversity.
The construction work was temporarily interrupted due to the COVID19 restrictions. All system hydraulics were completely housed in a container. The keys were handed over in October 2020.
A PV system still to be built on the east side will generate the electricity for the pumps in the future.
The picture on the left shows the boiler house and the buffer storage tank. Handover of keys from Jari Varjotie, CEO Savosolar Oyj, to Peter Blaser, managing director of the customer.
Løgumkloster Fjernvarme is a district heating company which annually supplies 35,000 MWh of heat to over 1,500 customers. Heat is produced with a hybrid heating system consisting of a 3 MW pellet boiler, a 1.3 MW hybrid heatpump, a 3 MW absorption heat pump and a solar collector field of 15,300 m2. Additionally, the plant has two gas engines which are capable of producing 7.6 MW of heat and 6 MW of electricity and a 10 MW gas boiler which acts as back-up.
In 2015, Savosolar delivered a 9,700 m2 solar thermal field to Løgumkloster. The second order of 5,600 m2 was delivered and commissioned in the beginning of 2016. The complete field consists of 1030 Savo 15 SG collectors and covers about 20% of the annual thermal energy need of the district heating network. The largest part of the heat demand is covered by the pellet boiler, but Løgumkloster Fjernvarme has plans to change this in the future by extending the solar field and building a large seasonal water storage.
Under construction
Lübeck, Germany (largest solar thermal plant in Schleswig-Holstein federal state)
Summa Energy has been selected as general contractor to build a 9 MW solar thermal system on behalf of Stadtwerke Lübeck Energie GmbH for its district heating network, which supplies households in the Moisling city district with healthy heating. Only 788 pieces of Savo 16S large scale high performance flat plate collectors are sufficient to getting combined with an 3,000 m³ heat storage tank and produce carbon free heat for the needs of all connected consumers.
Additionally, a PV system will be built on site to generate the electricity consumed by the solar pumps, thus unburdening the local power grid.
The scope of supply includes also all the land works, the construction of a technical building and the supervision system to operate the plant in automatic mode.
