w 2. A boiler with superheater generates 6000 kg/h of steam at a pressure of 15 bar, 0.98 dry at exit from the boiler an

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W 2 A Boiler With Superheater Generates 6000 Kg H Of Steam At A Pressure Of 15 Bar 0 98 Dry At Exit From The Boiler An 1 (109.66 KiB) Viewed 25 times

w 2. A boiler with superheater generates 6000 kg/h of steam at a pressure of 15 bar, 0.98 dry at exit from the boiler and at a temperature of 300°C on leaving the superheater. If the feedwater temperature is 80°C and the overall efficiency of the combined boiler and superheater is 85%, determine: a) The amount of coal of calorific value 30,000 kJ/kg used [5] b) The equivalent evaporation from and at 100°C for the combined unit. [1] c) The heating surface required in the superheater if the rate of heat transmission may be taken as 450000 kJ/m2 of heating surface per hour. [3] per hour.