District heating

Bad Rappenau

UNDER CONSTRUCTION

Bad Rappenau, Germany (largest flat plate collector plant in Germany)

Summa Energy has been selected as general contractor to build a +20 MW solar thermal system on behalf of Bauer Holzenergie GmbH for its district heating network, which supplies households and an industrial process for drying fruits with healthy heating. Only about 1,800 pieces of Savo 16S large scale high performance flat plate collectors are sufficient to getting combined with an 8,000 m³ heat storage tank and
provide 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.

Location

Germany

Construction status

Finished

Installation year

2024

Solution type

District heating

Number of collectors

1809

Collector Area

26827 m2
, gross

Collector Type

Savo 16 S

Power

20400 kW

Energy production

13000
MWh/a

Issoudun

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.

Fernwärme Ettenheim

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.

Suur-Savon Sähkö

Savosolar has been selected as general contractor to build the largest solar thermal system in Finland to date, on behalf of Suur-Savon Sähkö Oy for its district heating network in Puumala, which supplies households with healthy heating. In this hybrid installation the solar thermal system is producing both, high-temperature heat to district heating supply pipe and also low-temperature heat to improve heat pump plant COP.