Question 4 25 Marks a) Outline five advantages offered by steam as a process heating medium. (5 marks) b) Sketch the lay

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Question 4 25 Marks A Outline Five Advantages Offered By Steam As A Process Heating Medium 5 Marks B Sketch The Lay 1 (63.85 KiB) Viewed 36 times

Question 4 25 Marks a) Outline five advantages offered by steam as a process heating medium. (5 marks) b) Sketch the layout of a simplified process heating steam plant, labelling each of the key plant items and write a brief note on the function of each item shown. (8 Marks) c) In a test on a gas-fired steam boiler, the following observations were made: Gas bumed per hour 350 m per hr Water evaporated per hour 4175 kg per hr Boiler pressure 10 bar (absolute) Feedwater temperature 75 °C Dryness of steam leaving boiler 0.9 Net calorific value of gas 35 MJ/m Determine (0) the thermal efficiency of the boller (8 marks) the equivalent evaporation from and at 100 °C (4 marks) . .