Principles of naval engineering - Historic Naval Ships Association

, ,,PRINCIPLES OF NAVAL ENGINEERINGPRESSURE GAGERELIEF VALVEr BYPASS VALVEFROM-DESUPERHEATER.VAPORDRiPCOMPRESSORSEPARATORMANOMETER-VAPOR SEPARATOR DRAINCHECK VALVEDESUPERHEATER TANKFEED INLET-'VENT LINECONDENSATE3/64" ORIFICEOUTLET-STEAM CHEST VENT/^m^^^^^^^^^^^w\^^^^^^^^T"*!,BRINEOVERFLOW? li^m^mm^^'f^^^^^m^^^^^^^^^^"-TUBEHEAT VFNTEXCHANGER2^1^^OUTLETDRAINTRAPELECTRIC HEATER -J BRINE OVERFLOW OUTLET-FEED WATER 1CZD VAPOR AT ATMOSPHERIC PRESSURE 1M22 COMPRESSED VAPORFigureHEAT EXCHANGER. -The heatZl CONDENSATE^ CONCENTRATED BRINE-*- FLOW PATHS18-3.— Schematic view of vapor compression distilling plant.exchangerpreheats the Incoming sea water feed by two heatexchange processes. In one process, the seawater feed is heated by the distillate which isbeing discharged from the distilling unit to theship's tanks. In the other process, the sea waterfeed is heated by the brine overflow which isbeing discharged overboard or to the brine collectingtank.75.287The heat exchanger is a horizontal doubletubeunit. Either sea water or brine flowsthrough the inner tubes, while distillate flowsthrough the space between the inner and the outertubes.Figure 18-4 shows the construction of the heatexchanger and also illustrates the flow paths.454