Publisher: Stadtwerke München GmbH • Emmy-Noether-Straße 2 • 80992 Munich• www.swm.de Responsible for content and editing: Bettina Hess Telephone: +49 89 2361-5042 • Fax: +49 89 2361-5149 • E-Mail: presse@swm.de

Renewable Energies Expansion Campaign: Green energy & heating & cooling

SWM – At the forefront of the energy

transition The City of Munich has recognized the need for action. With the help of its municipal energy and infrastructure company Stadtwerke München (SWM) it is leading the way on climate and environmental protection. SWM is cur-rently at the forefront of the energy transition. SWM is committed to implementing Germany’s energy transition across the board. As part of its Renewable Energies Expansion Campaign, the company is pushing the production of renewable energies in power gener-ation as well as in heating. SWM firmly believes that the energy transition can only succeed if both power and heating are generated using renewable sources. SWM’s aims: • By 2025, SWM is aiming to produce as much green electricity at its own

plants as required to power the entire city of Munich. This would make Mu-nich the first city worldwide with over a million residents to have achieved this target! SWM has been conducting its renewable energy offensive with a budget of nine billion euros since 2008. It now boasts a production capacity equivalent to more than half the energy requirements of the city of Munich.

• With a view to also realizing the energy transition in the heating market, SWM

developed a district heating vision in 2012. The aim is to make Munich the first German city to use district heating generated exclusively from renewable sources by 2040. Geothermal energy will be the primary source for providing green heating.

Status in June 2018

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• Another regional building block of the company’s climate commitment is

green cooling. Thanks to the eco-cooling of groundwater and municipal subter-ranean streams, energy consumption for cooling purposes drops by around 70 percent. Emphasis is placed on the growing district cooling network in the city centre.

Green electricity: already more than half of Munich’s demand Today, SWM has a generation capacity of about 3.9 billion kilowatt hours of green electricity – a figure that already corresponds with more than 50 percent of Munich’s electricity requirements. Wind power plays a central role in the SWM strategy in addition to regional systems that harness the power of water, geo-thermal energy and sunlight. Regional and Europe-wide commitment Projects in Munich and its surrounding region have been prioritized by SWM. The company currently operates 24 photovoltaic plants, 13 hydroelectric power plants, a biogas processing plant, five geothermal plants (two of which are used purely for generating heat) and a wind turbine. Further power plants are planned. Nevertheless, SWM is unable to generate as much renewable power in the re-gion around Munich as is required for the metropolis, as the regional potential is limited. That is why the company participates in projects in the rest of Germany and Europe. Across the continent, the company selects and uses the most suita-ble locations for constructing renewable power plants after taking energy and economic viability factors into consideration. SWM is harnessing this potential with a view to safeguarding Munich’s energy future. The power is fed into the grid where it is produced in an effort to avoid losses involved in transporting power over long distances with power lines. The inte-grated European power network is comparable to a huge lake. Everyone who generates power feeds into this “lake of energy”, while everyone who consumes power draws from the lake. Every kilowatt hour of renewably-generated power helps to make this European lake a little cleaner. Being involved in climate-friendly energy generation plants away from Munich is therefore just as significant as doing so in Munich itself. After all, the positive ef-fects on the environment also benefit the residents of Munich. The renewable energy plants already operated by SWM alone save around 2 million tons of carbon dioxide emissions every year as well as more than 1.1 tons of radioactive waste.

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Green heating: a vision becomes reality

Munich has one of the most extensive district heating networks in Europe with a total length of around 800 kilometres. SWM currently produces the majority of its district heating in highly efficient combined heat and power plants. Fossil fuels are to be gradually replaced by renewable heat sources by 2040. To this end, geothermal power is to make up the primary source of Munich’s district heating supply. For the transition time, the cogeneration plants Nord and Süd with their environmentally-sound combined heat and power plants are indispensable for the security of Munich’s heating supply and for bridging the gap into the new era. In Germany, most energy is consumed for heating. It makes up around 40 per-cent of overall energy consumption, while the heating and warm water supply even account for some 90 percent of energy consumption in private households. The energy transition can only succeed overall if renewable energy sources can also be used to replace conventional power in this area. SWM is therefore taking an integrated approach: Its Renewable Energies Expansion Campaign encom-passes this key area of energy generation – one which has been long neglected both politically and economically up to this point. Green heating: Geothermal power under Munich By switching district heating to renewable energy sources in the long term, SWM will therefore once again significantly im-prove the already excellent carbon foot-print of district heating. Due to the unique characteristics of the Munich region, geo-thermal energy will make a substantial contribution to these efforts. In fact, hard-ly any other region in Germany can com-pete with the excellent geological poten-tial for the use of geothermal energy held by Munich and its surroundings. The geothermal energy comes from hot thermal water drawn out of permeable limestone layers (malm rock). Munich is located right on top of a huge reservoir of this natural energy source. At a depth of 2,000 to 3,000 meters, the water has a temperature of between 80 and over 100 °C. The heat from this thermal water is ideal for use in heating. To this end, the water is pumped to the surface and fed through a heat exchanger, extracting its energy. Once cooled, the water is then fed back deep underground. As a result, the geothermal power cycle doesn’t impact on the ecosystem.

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In the Riem district as well as in the municipality of Sauerlach to the south of Munich, SWM has already been using geothermal power successfully for some time. A geothermal power plant in the Freiham district has been in operation since 2016. Another plant will to be built from 2018 on the site of the combined power and heating plant “HKW Süd”. SWM is aiming to build four further geo-thermal plants in the period up to 2025. One aspect supporting SWM in realizing its vision is the likelihood that energy requirements for heating purposes will gradually sink in the long term due to en-ergy-saving and energy-efficiency measures like building renovations.

Green cooling: Munich’s climate-friendly cooling supply In Munich, power consumption during the summer months is approaching that during the winter. The main reason for this is the increasing use of air condition-ing systems. Computer centres, for example, require energy-intensive cooling systems. But thanks to the added comfort they afford, air conditioning systems are now also part of the basic equipment in high-quality office and residential buildings as well as retail shops. This trend has been compounded by extreme climate phenomena, as evidenced by the "once-in-a-century” summers of 2003, 2006 and 2015. M-Fernkälte benefits the climate, customers and the city The principle of district cooling is analogous to that of district heating: Centrally cooled water is delivered to customers through a network of pipes. At the sites of use, the chilled water absorbs waste heat from building air conditioning systems. It is then fed through a second, parallel line back to the central cooling plant, where it is cooled again and recirculated back to the customer. SWM also utilizes groundwater and subterranean municipal streams for cooling purposes. These are used either for direct on-site cooling or to recool centralized systems. Since district cooling is a closed system, there is no interference with the water ecology. Thanks to such natural methods, significantly less electricity is needed for cool-ing. It is possible to achieve a total electricity saving of around 70 percent com-pared to the use of discrete cooling towers. M District Cooling is a key element of SWM’s strategy to protect the climate and reduce dependence on fossil fuels. In total, SWM has invested over 30 million euros in expanding the district cooling network in Munich alone.

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Filières wind park (photo: Nordex)

Renewable Energies Expansion Campaign –

green power projects in detail:

SWM owns more than 100 onshore wind plants in Germany, e.g. a 75 per-cent stake in the Havelland project; yield: 236 million kWh/year (corresponds with the requirements of 95,000 households in Munich); SWM onshore wind parks (North Rhine Westphalia, Rhineland Palatinate, Saxony-Anhalt, Branden-burg); yield: approx. 100 million kWh/year (corresponds with the requirements of 40,000 households in Munich) SWM owns three onshore wind parks in France. Yield: 64 million kWh/year (corresponds with the requirements of 26,000 households in Munich)

Since 2015, SWM has owned one onshore wind park in Sweden. Yield: 400 million kWh per year (corresponds with the re-quirements of 160,000 households in Munich)

Together with municipal partners SWM is building an onshore wind park in Norway. It will go online in the beginning of 2019. SWM participation: 60 percent (corresponds with the requirements of 84,000 households in Munich)

Dehlingen wind park (photo: VSB)

Havelland (photo: SWM)

Photos: SWM

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Photo: Global Tech I/Derek Henthorn

Planning, construction and operation of onshore wind parks in Europe: SWM holds a 33 percent participation in wpd europe – a company currently ac-tive in 11 European countries. To date, wind parks in Poland, Croatia, Belgium, France and Finland have been realized, among other projects. Together with Vattenfall, SWM holds a participation in two offshore wind parks off the coast of the island of Sylt: The DanTysk wind park has been in operation since 2015. SWM participation: 49 percent (corresponds with the requirements of 250,000 households in Munich) The Sandbank wind park has been in operation since 2017. SWM participation: 49 percent (corresponds with the requirements of 250,000 households in Munich)

The offshore wind park Global Tech I is located in the North Sea, around 180 kilometres off Bremerhaven. It has been in operation since 2015. SWM participation: 25 percent (corresponds with the requirements of 140,000 households in Munich)

RWE Innogy, SWM and Siemens have been operating the offshore wind park Gwynt y Môr in the Irish Sea since 2015. Yield: 1.95 billion kWh/year. SWM participation: 30 percent (corresponds with the requirements of 240,000 households in Munich)

Since 2012, SWM has been running the parabolic trough power plant Andasol 3 in Spain together with partners. SWM’s participation corresponds with the requirements of 30,000 households in Munich

Solar park in Rothenburg/Oberlausitz – SWM par-ticipation: 40 percent (corresponds with the require-ments of 3,200 households in Munich)

Photo: SWM

Photos: Paul Langrock

Photo: SWM

Photo: SWM

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Thin-film solar plant Lauingen/Donau – SWM participation: 49.9 percent (corresponds with the requirements of 2,000 households in Munich)

The SWM geothermal heating and power plant in Sauerlach produces electricity for 16,000 households in Mu-nich as well as heating for Sauerlach’s households.

The two SWM geothermal power plants in Dürrnhaar and in Kirchstockach (both to the south of Munich) produce electricity for 32,000 households.

The Prater plant is located in the heart of Munich below the Isar. SWM’s participation cor-responds with the require-ments of 2,800 households SWM is planning additional hydroelectric projects in the region, e.g. a partic-ularly environmentally and fish-friendly “moveable hydroelectric power plant” at the confluence of the Amper and the Isar near Wang. In addition, the company is investigating whether an innovative small-scale hydroelectric power plant can be realized on the grounds of Hellabrunn Zoo.

Invisible power plant under the river (photo: SWM/Green City Energy)

Prater plant turbines (Photo: SWM)

Photo: SWM

Photo: SWM

Photo: BayWa r.e.

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SWM is modernizing existing hydroelectric power plants on the Isar, which therefore produce more green power and save more carbon dioxide.

Do your bit for the climate with M-Ökostrom If you would like to support SWM in its expansion campaign, you can opt for one of the M-Ökostrom products.

Moreover, if you choose M-Ökostrom aktiv you can make a voluntary contribu-tion to expanding the use of renewable energies in and around Munich. SWM has already invested around 9 million euros in renewable energy plants from the voluntary environmental surcharge.

Notes: • All calculations are based on an average consumption of 2,500 kWh/year per household in Munich.

• The production figures stated are average and planned figures, as the yield from solar, wind and hydroe-

lectric power can fluctuate.

Photovoltaic system on the Tram main workshop (Photo: SWM)

Small hydroelectric power plant ‘Stadtbachstufe’ before containment (Photo: SWM)

Hydroelectric plant Isar 1 (Photo: SWM)

Hydroelectric plant Isar 2 (Photo: SWM)

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Renewable Energies Expansion Campaign –

green heating projects in detail: SWM launched its first geothermal plant in Riem in 2004. Thermal water with a temperature of over 90°C is extracted from 3,000 meters below the surface to cover a significant part of the heat-ing requirements for the residential buildings in the Messestadt, the local businesses and Messe Munich.

Since autumn 2016 the Freiham geothermal plant co-vers the base load of heating required in the new city dis-trict Freiham and neighbouring areas in Munich West.

In April 2018 drilling started for a geothermal plant at the power and heating plant Süd. After com-pleting the construction by the end of 2019, the district heat station will be built. Subsequently, SWM will start long-term pumping tests and fine-tuning of the system. By 2020 the plant will com-pletely go online. The plant is located at the inter-section of three networks, meaning that up to 50 megawatts can be fed into the Innenstadt, Sendling and Perlach networks from here. This amount will cover the heating requirements of up to 80.000 citizens By 2025, SWM is aiming to construct three further geothermal plants. In an effort to find suitable locations, the company carried out wide-ranging 3D seismic surveys across large parts of the city between November 2015 and March 2016. The next locations will gradually be determined after evaluations have been completed.

(Photo: SWM)

(Photo: SWM)

(Photo: SWM)

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M- Fernkälte (district cooling) – projects in detail

District cooling network in the city centre SWM has been operating a district cooling network in Munich’s city centre since 2011. Two cooling plants are located in the basement levels of the Stachus building. The third cooling centre at Odeonsplatz will go into operation in mid-2018.In addition, nine large ice storage tanks at Stachus help save cooling ener-gy that is not used at night for use in peak periods during the day – an approach that is both cost-effective and environmentally friendly. SWM also uses the natural cool-ness of the subterranean munici-pal stream (Westlicher Stadtgra-benbach). As a result, an annual average EER (energy efficiency ratio, i.e. the ratio of cooling out-put to electricity consumption) of 5.3 is achieved, including all aux-iliary energy input. The EER is only around half that in conven-tional cooling plants and much lower still in smaller systems. M-Fernkälte has also been used for many years outside the city centre:

SWM has been supplying the BMW Group’s Research and Innovation Cen-tre with chilled water from subway culverts since 2004. In recognition of this in-novative, environmentally friendly project, SWM and the BMW Group received the Bavarian Energy Award in 2006.

The SWM Headquarters in Moosach has been using groundwater for cool-ing purposes since 2005 along with Munich’s adjacent IT-Rathaus (central IT service provider for the City of Munich) since 2014. An extension of the cooling network will also include the future construction project on Georg-Brauchle-Ring.

SWM has supplied ecological cooling to a large printing company on Dessau-erstraße since 2017. Other commercial enterprises in the neighbouring Moosa-cher Straße will also be connected to the M-Fernkälte network in the near future.

In 2018, it is planned to supply a new office and retail building on Heime-ranplatz with groundwater cooling from subway culverts. An innovative feature is that the system will also generate heat. Simultaneous cooling and heating helps maintain the thermal balance of the water supply.