Renewable Energy

Photovoltaics

Solar energy is available in virtually unlimited quantities. The solar energy can be used for power generation for example by using thermal processes in form of solar panels (hot water supply) or photovoltaic processes (solar cells).

Photovoltaic systems convert sun light in electricity by using solar cells. Usually, the generated energy is fed into the public power grid. Solar cells are either amorphous silicon layers or polycrystalline or monocrystalline silicon cells. These solar cells are wired among each other as standard moduls by the manufacturer. Due to the different wiring options standard moduls can have various sizes and shapes. Due to these variations it is possible to attach solar cells to different girder constructions, e.g. to roofs, facades and carports. Furthermore, it is possible to erect solar modules on open space when attached to an alluminium girder construction. These open space systems can not only be erected on undeveloped ground but also on brownfields and landfill sites. Hence, photovoltaic systems offer a possibility to use anthropogenic sites for the renewable energy generation.

Our services:

  • Identification of potentially suitable locations or a assessment of photovoltaic options on defined sites
  • Preliminary design and preparation of feasibility and economical studies
  • Compilation of approval documentation (building application, building permit)
  • In the context of complex approval procedures we cooperate with specialized engineering offices in order to prepare environmental assessments, fauna-flora-studies, EIAs, etc.
  • Preparation of tender documents and support during contract award process
  • Supervision and coordination of construction measures, intermediate and final inspections of the photovoltaic system

It is our goal to design a photovoltaic system with the highest possible capacity under the given site conditions.

Solart thermal energy

Solar thermal energy is used in the private sector mostly for heating and air-conditing in buildings. In combination with a good thermal insulation and the passive use of the solar radiation the additional demand for heating can be significantly reduced. A well-planned passive use of solar energy can substitute an active heating system completely, even in Central Europe.

Geothermal Energy

Below the earth’s surface the temperature remains constant in the first hundred meters and the constantly rises the deeper we go. This heat can be utilized directly for the heat supply or indirectly for power generation. Both situations require the development of the hot thermal waters and the transport to the the surface. Respectively, when no thermal water exists it is possible to use the thermal energy of the deeper rock strata by pumping water through these rock strata  and back to the surface (heat carrier).

In order to generate heat, especially for district heating, thermal water with 40° to 100°C is pumped up from deep layers of the earth and the heat energy is transferd into the heating circuit of  a thermal power station via a heat exchanger. The cooled water is pumped down deep again. For the generation of power the water temperature has to be 80°C and higher so that the resulting water vapor can drive a turbine of the power generator.

Our services:

  • Identification of suitable locations and methods for the geothermal energy generation
  • Coordination with expert companies in regard to system design, operation and usage
  • Exploration and assessment of geological and hydrogeological site locations
  • Coordination of licensing-related aspects with the responsible authorities
  • Identification of subsidies
  • Pre-dimensioning of the geothermal field
  • Preparation of reports and construction preliminary inquiries
  • Preparation of tender documents, contractor support during the awarding process and the professional supervision of test drillings and other test (thermal response tests up to temperature stability, duration approx. 50h), incl. evaluation
  • Licence planning (preparation of licensing documentation) incl. dimensioning of the geothermal probe system
  • Development of a probe field incl. preparation of tender documents, contractor support during the awarding process and the professional supervision of the construction process

Thermal energy is independent from weather conditions and available 24/7. If the subsoil has suitable geological properties the commercial use of the geothermal energy is possible.

Deponiegas, Biogas, Biomasse

Aus dem in Deponien abgelagerten organischen Abfall entsteht durch mikrobielle Umsetzung Deponiegas. Die Umsetzungsraten werden durch die Milieubedingungen, wie Feuchtegehalt oder Temperatur bestimmt.

Im Durchschnitt geht man davon aus, dass über einen Zeitraum von ca. 50 Jahren aus einer Tonne Hausmüll ca. 190 bis 250m³ Deponiegas gebildet werden können. Der Methangehalt des nativen Gases beträgt 55 Vol. %. Damit ergibt sich ein Energieinhalt von ca. 5,5 kWh pro Kubikmeter Deponiegas. Das entspricht einem halben Kubikmeter Erdgas oder aber 0,5 l Heizöl. Deponiegas ist in Konzentrationen zwischen ca. 4,5 bis 15 Vol. % in der Luft zündfähig. Da Methan zusätzlich ein klimaschädliches Gas ist (CO2 – Faktor: 21) muss das Deponiegas aktiv aus der Deponie über Gasbrunnen oder Gasrigolen abgesaugt werden. Über Hochtemperaturfackeln, über 1000°C oder aber z.B. in Gasmotor/Generatoranlagen kann das Deponiegas in Strom und Wärme umgewandelt werden. Pro Kubikmeter Deponiegas lassen sich somit ca. 2kWh elektrische Arbeit erzeugen.

Schadstoffgehalte im Deponiegas können durch angepasste Gasreinigungssysteme soweit reduziert werden, dass ein weitgehend störungsfreier Anlagenbetrieb möglich ist. Wir planen standortspezifische Gaserfassungssysteme zur aktiven Deponieentgasung sowie die dazugehörigen Gasverwertungsanlagen, in Abhängigkeit der abgelagerten Abfallmengen, zur Strom- und Wärmeproduktion. Darüber hinaus bieten wir auch die laufende Betriebsberatung zur Optimierung der Gaserfassung bzw. Gasverwertung an. Unser interdisziplinäres Projektteam bestehend aus Bauingenieuren, Verfahrens- und Elektroingenieuren und  Geologen, berät Sie umfassend bei der aktiven Deponiegaserfassung und -verwertung .