CENTRAL COOLING SYSTEM

•     TO PREVENT PROBLEMS ASSOCIATED WITH SALT WATER SYSTEM  FRESH WATER IS USED FOR COOLING ALL THE COMPONENTS WHICH FORMS A CLOSED SYSTEM.

• ·   SALT WATER PASSES THROUGH ONLY ONE SET OF PUMPS, VALVES, AND FILTER AND A SHORT LENGTH OF PIPING.

• ·    THE SEA WATER TAKES WATER FROM THE SUCTIONS ON EITHER SIDE OF THE MACHINERY SPACE AND AFTER PASSING THROUGH THE COOLER IT IS DISCHARGED STRAIGHT OVERBOARD.

•      THE FRESH WATER IN THE CLOSED SYSTEM IS TREATED WITH CHEMICALS TO PREVENT CORROSION OF THE PIPEWORK AND COOLERS. WITH CORRECT CHEMICAL TREATMENT, CORROSION IS ELIMINATED IN THE FRESH WATER SYSTEM, WITHOUT THE NEED FOR EXPENSIVE MATERIAL.

•       IT CAN BE DIVIDED INTO THREE SECTIONS:-                                                              

                                     1. SEA WATER CIRCUIT                       
                                      2. HIGH TEMPERATURE CIRCUIT         
                                       3. LOW TEMPERATURE CIRCUIT

            COMBINATION OF THESE IS KNOWN AS CENTRALISED COOLING SYSTEM.

• THE OUTLET OF JACKET COOLING WATER IS USED FOR THE EVAPORATION OF SEA WATER (FRESH WATER GENERATOR).
• HIGH TEMPERATURE SYSTEM(HT) IS USED FOR

               - MAIN ENGINE LINER COOLING

                  -CYLINDER HEAD COOLING

                    -EXHAUST VALVE COOLING

• ·        LOW TEMPERATURE(LT) USED FOR:-

§  FUEL VALVE COOLERS

§  AIR CONDITIONING CONDENSER

§  SHAFT BEARINGS

§  HYDRAULIC OIL COOLERS

§  MAIN AIR COMPRESSOR

. MAIN ENGINE AIR COOLER   

. LUBE OIL COOLER