AIM: to investigate the optimal water-addition method regarding efficiency, emissions trade-off, reliability, design complexity and the safe operation on-board ships .

Objectives:

• To confirm the NOx-reducing potential observed in lab tests
• To model and simulate water injection processes
• To develop water injection systems
• To test the developed systems on-board

NOx reduction potential with different methods (courtesy of Wartsila Corporation).

Direct Water Injection system with centrally located double-needle injector (courtesy of Wartsila Corporation).

Side-mounted Direct Water Injection (courtesy of Wartsila Corporation).

NOx reduction and increase in fuel consumption as function of water/fuel ratio for Direct Water Injection (courtesy of Wartsila Corporation).

Sea-going vessels for service tests (courtesy of A/P Moller Maersk).

Sea-going vessels for service tests (courtesy of Wallenius Marine).