WP5 Energy Transformers

The purpose of this WP is to identify, evaluate technologies and demonstrate the heat recovery methods described in WP4.

Alternative use of recovered energy (el-generation, propulsion, auxiliary etc) to be investigated and the potential estimated.

An Organic Rankine Cycle (ORC) based demonstration power plant will be built at the Högsbo CHP plant in Göteborg. The existing plant generates 13 MWe and 16 MWheat to the grids. By utilizing some of the heat further electricity can be produced. The proposed ORC-unit will generate 1 MWe more. The ORC will be built as a module and installed in an area inside the existing CHP plant. The trials aim for finding the best turbine design, selected fluid and heat transfer components.

The Högsbo plant is owned by Göteborg Energi AB and operated by Wärtsilä Sweden AB.

The chosen technology can be applied for ships as wells as for land based plants. The plant will demonstrate that ships will be self sufficient with respect to electric power without running auxiliary gensets or generators only using waste heat.

Energy transformers include functions such as electrical power generation, mechanical power generation, water making, heating and chilling.

Second order sub-functions such as heat transfer, power generation, power quality control, drive trains and thermal processes will be specified for the design case and used in the trade-off.

Topics of particular interest to the study:

  • Optimisation of ORC-process for use in the design case
  • Improvements in EGB gas cooling systems
  • Trade-off between thermal oil and steam as collector and carrier of combustion gas cooling, considering integrated ORC and improved EGB-process
  • Trade-off between water making and power generation from waste heat
  • Component compatibility to marine standards and certifications requirements
  • The purpose of WP5 is to provide a recommendation for best practise in the design case, based on a trade-off defined above and how these systems can be applied in WP8.