Design of Energy Saving Controllers for Central Cooling Water Systems

Since fuel prices account for approximately 40% of a ship’s operating costs, shipping companies worldwide have made significant efforts to save energy on board such as introducing new technologies or machine operation methods. Many ship operators adopted an advanced control system using variable-speed pump and/or optimizing three-way valve the outlet side central cooling system. It is often considered that best way integrate two systems. However, when applied in practice, there frequent uncontrollable phenomenon which opened its minimum and seawater operated at maximum, resulting large amount consumption. Therefore, this study, speed set minimum, feed-forward controller The input variable Main Engine load, it designed directly bypass openness with controller. Using design, was demonstrated saved.