Silkem: Turn-key cogeneration system (CHP)

Silkem is recognized European manufacturer of raw materials for detergents and chemical industry, refractory materials, ceramic and foundry industry. For production purposes they require the heat, produced by the gas boilers and two existing cogeneration systems.

Business challenge

Both existing cogeneration are 10 years old and are no longer eligible to receive support for electricity produced. It was therefore essential to prepare a renewed feasibility study on the basis of which they will determine the size of the new CHP systems. This way the continuity in the production of electricity and heat with high efficiency, which is also more economical than the production of heat from gas-fired boilers, would be ensured.


  • Termination of government subsidies for electricity produced.
  • Good experience with the system of CHP in the past.
  • The contract with ELES to provide peak power.

Capabilities and solution

Mr. Jože Furman, head of energy, said they want a CHP system:

  • which will include motor assemblies from the same manufacturer as the earlier engines (Caterpillar)
  • which would have the same kind of monitoring and management of the plant as existing,
  • which will be implemented within a time limit, so that supply of heat during the winter will not be interrupted.

Inea supplied two Caterpillar engines with an average electrical efficiency of 42% and thermal efficiency of more than 43% and integrated them into heat and electricity production system.


  • Supply and integration of two CHP systems in an integrated system of heat supply and power generation. Engines rated electrical power of 1,000 kW and 1,600 kW thermal power and 1,055 kW and 1,680 kW.
  • Implemented a system for control and management of the overall CHP plant.


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