Marine System

  FO Booster pump unit GENERAL Booster pumps are used to pump the oil through heaters and a viscosity regulator to the engine-driven fuel pumps. The fuel pumps will discharge high-pressure fuel to their respective injectors. To cool the engine mounted high pressure injection pumps, the capacity of the booster pump has to be at least 300 % of maximum fuel oil consumption at injection viscosity. F.O System Diagram Required delivery capacity of  HFO at 145° C as shown at below formula : QP2 = P1 x br ISO x f5 Where : QP2 (l/h) = Required booster pump delivery capacity with HFO at 145° C P1 (Kw)  = Engine output at 100 % MCR brISO (g/kWh) = Specific engine fuel consumption (ISO) at 100 % MCR f5 ( l/g) = 3.9 x 10^-3 Factor for pump dimensioning ▪ For diesel engines operating on main fuel HFO Note! The factor f5 includes the following parameters: ▪ 300 % fuel flow at 100 % MCR ▪ Main fuel: HFO 380 mm2/50 °C  ▪ Attached lube oil and co...

GENERAL The primary aspects of a properly designed engine room ventilation system are cooling air and combustion air. Cooling air refers to the flow of air that removes radiant heat from the engine, generator, other driven equipment and other engine room components.  Combustion air describes the air the engine requires to burn fuel. Cooling and combustion air directly impact engine and package unit performance and dependable service life; these must be considered in the design of an engine room ventilation system. It is also important to consider all engine room equipment in the design of a ventilation system and provide a comfortable environment for service personnel to perform maintenance. Some driven equipment, such as a generator in a large engine installation,may require a dedicated ventilation source. Sizing Considerations Cooling Air A portion of fuel consumed by an engine is lost to the environment in the form of heat radiated to the surrounding air. In addition...