Datum

    DATUM LEVEL IN REFRIGERATION ASSUMED DATUM LEVEL FOR VARIOUS VAPOR REFRIGERANTS FPS units(–400 F) mks units( 00 C) SI units (-400 C)    hl=0 sl=0   hl=100 k cal/kg sl=1.0 k cal/kg 0 C   hl=0 sl=0 Where hl is enthalpy of liquid and sl is entropy of liquid respectively. FOR WATER, ASSUMED DATUM LEVEL  IN SI…