Organisation of Municipal Climate Protection initiatives in Croatia

The project ‘Organisation of municipal climate protection initiatives in Croatia’, funded by the German Federal Ministry for the Environment (BMU), and implemented through the German Society for International Cooperation (GIZ), had the goal to set up and begin implementation of the climate protection programmes of selected Croatian cities and municipalities. The initiatives were embedded in, and coordinated by multi-level networks, so that the participants had the opportunity to learn from each other and from external specialists.

Services provided by igr

  • Strengthening of networking among municipal energy and climate protection representatives
  • Communications and public relations
  • Organising a study trip of Croatian partners to Germany (Rheinland-Pfalz)
  • Preparation and running of networking meetings
  • Preparation and running of final event
  • Establishment and management of a network
  • Climate protection consultancy in the fields of solar energy, biomass and energy efficiency
  • Consultancy services
  • Project management

Planning, management and supervision of the Enkenbach-Alsenborn biomass thermal power plant, district of Kaiserslautern

The Enkenbach-Alsenborn municipality has constructed a biomass thermal power plant, in which exclusively renewable raw materials are used to produce energy. The feed-in tariff is fixed according to the German renewable energy act (EEG) and the co-generation act (KWK-Gesetz). igr was commissioned to provide overall planning, construction supervision and project management.

Heat extraction is adjusted flexibly; so that it is possible to match the power production and heat production to actual demand. The heat produced supplies the Enkenbach-Alsenborn municipality local heating network. Using air-cooled condensers waste heat can be delivered at a lower temperature to operate greenhouses (optional service).

Residual wood from forests and green waste is exploited in this biomass thermal power plant. In total the biomass thermal power plant produces the following types of energy: electricity, heat for a local heating network at 134 °C and heat from waste heat at 50 °C for greenhouses (optional).

Services provided by igr

  • Project management
  • Overall planning in accordance with Federal pollution control legislation § 4 BimSchG
  • Construction supervision

Key figures

  • Turbine output: flexible up to 2.6 MW
  • Heat extraction: flexible up to 3.0 MW
  • Steam production 11.5 MW
  • 25,000 t/a renewable raw materials

Planning, management and supervision of the Kaiserslautern biomass thermal power plant, city of Kaiserslautern

The Kaiserslautern joint venture for waste management (ZAK) has decided to utilise biomass in a thermal power plant at the Kapiteltal depot. A biomass thermal power plant was built for this purpose. igr was commissioned with the planning and project management.

The economic efficiency of such a plant depends, amongst other things, on the power being on the power being fed into the public power network at subsidised rates (as required by German renewable energy legislation). In Germany, the network operator is required to accept renewably generated power and to pay a minimum tariff to the producer.

Old and new wood, landfill gas from the landfill waste, and biogas derived from methanation are used in the biomass thermal power plant.

The biomass thermal power plant provides the following types of energy: electrical energy, heat extracted for the internal company network, and process heat recovery.

Services provided by igr

  • Project management
  • Planning of engineering constructions
  • Structural planning
  • Specialist planning of technical equipment
  • Technical surveying services

Key figures

  • 25,000 MWh/a power output
  • 4,000 MWh/a heat output
  • 20,000 t/a combustible material – wood (class A I and A II)
  • 800 Nm³/h landfill/bio gas

Planning the photovoltaic system on the Treskavac waste reception hall, the island of Krk, Croatia

The first photovoltaic system on the island of Krk was built on the roof of the Treskavac waste reception hall. The system has an output of 136.8 kWp.

The island of Krk, with its municipal operator Ponikve d.o.o. is the front runner for environmental and climate protection in the region.

igr provided the entire authorisation and planning services for the construction project. The system will be subsidised through the Croatian environmental fund.

Services provided by igr

  • Project leadership/project management
  • Entire project planning
  • Authorisation processes
  • Tender processes
  • On-site construction supervision

Key figures

  • ca. 934 m² roof area
  • ca. 136.8 kWp
  • ca. 169,886 kWh solar power harvest

Investigation of various options for a heating system, the island of Krk, Croatia

The administrative buildings of the town of Krk are currently heated with an oil boiler that is more than 30 years old. Besides the equipment’s inefficiency, the increasing cost of oil mean that the plant no longer provides an adequate performance. An improvement in efficiency, together with a lowering of heating costs, became an important goal.

igr investigated heating options using a combined heat and power unit (powered either by oil or liquefied natural gas), as well as heating systems powered by wood chips and/or pellets. At the particular request of the town of Krk, a combination system using wood pellets and a solar-thermal plant was considered. The goal of the investigation was to compare the corresponding financial costs of the various options with the current system, in order to recommend a long-term economic option.

Services provided by igr

  • Data collection and assessment
  • Price trend scenarios for a variety of fuels
  • Needs assessment by means of consumption data and the existing building fabric
  • Efficiency scenarios
  • Analysis of the respective operation costs
  • Investment and financing plan
  • Comparison of respective annual financial cost to the public budget

Key figures

  • ca. 6,500 inhabitants