Onnelanpolku nursing home, which was built in 2013, is a so-called near zero energy building. To achieve this classification, the building needs to be well insulated and some of the consumed energy needs to be produced locally. A hybrid heating system for DHW and space heating was realized with the combination of solar thermal collectors and district heating.
Savosolar delivered 240 m² of collector area, which is used to cover 20–30% of the total thermal energy need of the building.
With a size over 13,000 m2, this system is the second largest solar heating system in France and the second largest solar thermal system for industrial process heating in Europe. Savosolar has delivered the largest part of the whole solar thermal plant including the solar collector field, civil work, piping and design and delivery of heat exchange station.
Kyotherm and its affiliate Kyotherm Solar are investment companies which specialize in the third-party financing of renewable heat and energy efficiency projects. Kyotherm Solar is selling heat from this system to a malt drying factory, which is operated by Malteries Franco-Suisses.
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.
Savosolar’s first commercial solar cooling system was delivered to a school in Ukraine. The entire school was pre-fabricated in Finland and delivered to Ukraine by Elemenco Oy.
Outside of the cooling period, the solar thermal system produces energy for domestic hot water and space heating needs. During the hot summer time, three adsorption chillers cool the building via the air handling unit. The adsorption chillers, which were delivered by Savosolar, are driven by the solar thermal system.
