Renewable energies

Renewable energies are key to the climate-friendly supply of power and heat. In Germany, they were used to generate more than 190 billion kilowatt hours of electricity in 2016 – five times more than in the year 2000. Energy transition is also gaining in significance internationally. In 2015, the investments in renewable energies were almost double the amount spent on all fossil and nuclear generation technologies combined. Our German engineering and experience with the energy transition is appreciated worldwide: as the technical project developer, general planner or operator, we implement a broad spectrum of national and international energy projects.

  • More than just moving air: wind

    The generation of energy from wind power is an important and growing component of the STEAG energy business. We are building large-scale generation plants, advancing the international development of onshore wind generation facilities, and investing in wind farms abroad. 

    The service portfolio of STEAG Energy Services covers the entire value chain of plants for power generation: from project planning and engineering via operation management and optimization right up to intelligent IT solutions. With the WINDcenter, these services and our broad expertise are made available for the wind energy sector.

  • We use the power of the sun: solar thermal energy and photovoltaics

    Solar power can be used in the form of solar thermal energy or photovoltaics. In concentrated solar power (CSP), solar radiation is concentrated to generate heat, which is then fed into a conventional water-steam cycle. Here, our activities relate to solar thermal plants installed at solar locations along the earth’s sun belt. We work in all three different technologies, namely parabolic troughs, linear fresnel reflectors and solar towers, along with hybrid systems combined with conventional power plants. Our engineers have demonstrated their competences in a number of solar thermal power plant projects.

    SES evaluates the feasibility of solar thermal projects worldwide and provides support in implementing them. In the process, SES contributes its many years of experience in conventional energy generation. To remain independent from the sun, we examine whether and to what extent hybrid technologies can be used. The Spanish 50 MW solar thermal power plant in Arenales near Seville is operated by our Spanish subsidiary SES Solar and builds on long-standing operational expertise.

    We own and operate photovoltaic plants in India, which, for instance, supply a hospital and school with affordable electricity. We optimise plant operation through the targeted use of battery systems and contribute our expertise from the evaluation of a number of PV projects for our customers’ benefit. We evaluate the feasibility of various projects worldwide and support potential investors in assessing them.

  • Going deeper underground: geothermal energy

    Going deeper underground: geothermal energy

    Geothermal heat offers enormous potential as a source of energy. Geothermal energy is stored in the outermost layers of the earth’s crust and can be used to generate heat or electricity. STEAG is a market leader in Germany in developing district heating using geothermal energy. To date, it has mainly completed geothermal projects in Upper Bavaria, including the geothermal combined heat and power plant for the town of Unterschleissheim.

    Ninety-nine per cent of our planet is hotter than 1,000°C. Geothermal heat offers countless advantages over other forms of energy. It can be used around the clock and is extremely climate friendly. The principle of geothermal energy is simple: the deeper the hole in the ground, the higher the temperature. According to geoscientific evaluations, a temperature of between 5,000°C and 7,000°C prevails at the earth’s core. In turn, the amount of energy that the power plant operator can obtain from the earth’s natural heat also increases.

    STEAG wishes to tap into this potential and is planning the construction of a geothermal power plant in Indonesia. A geothermal power plant to generate electricity with a power output of up to 220 MW is being developed in Baturraden, at the foot of Mount Slamet – this is far more than the output generated by conventional German geothermal plants. SES engineers are available here as technical service providers – when developing the site, for example.

  • Using renewable resources: biomass

    Of all the renewable energies, biomass (when used as a solid fuel) is most similar to conventional fuels. The recovery of energy from locally-available biomass is already making a remarkable contribution to supply security today. For SES, it is therefore a matter of course to also consider new approaches to the use of biomass.

    We plan, build and operate thermal power plants for the recycling of organic waste and sometimes go the extra mile in providing new solutions. As a result, we have developed a concept for the energetic use of biomass in the form of bush in Namibia, for example. The entire value chain was reviewed – beginning with the harvesting and processing through to storage and finally resulting in producing electricity. This is a good example of how a problem such as massive bush encroachment can be transformed into a significant economic opportunity and energy resource.