Question 4 25 Marks (a) A sectional schematic of a typical process steam boiler is shown in Fig.4. Identify any five of

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Question 4 25 Marks A A Sectional Schematic Of A Typical Process Steam Boiler Is Shown In Fig 4 Identify Any Five Of 1 (68.72 KiB) Viewed 41 times

Question 4 25 Marks (a) A sectional schematic of a typical process steam boiler is shown in Fig.4. Identify any five of the labelled items A to l and write a brief note explaining the function of the fittings selected (15 marks) (b) in a test on a gas-fired steam boiler, the following observations were made: Gas bumed per hour 35 m per hr Water evaporated per hour 417 kg per hr Boiler pressure 8 bar (absolute) Feed water temperature 90 °C Dryness of steam leaving boiler 0.90 • Net calorific value of gas 35 MJ/m? . Determine 0) The thermal efficiency of the boiler The equivalent evaporation from and at 100 °C (6 marks) (4 marks) Steam Baier C E F OOOOOOOOOOO OOOOOOOOOOO DOO H ple B G Fig. 4