Steel stack design as per ASME STS-1Full description
A complete design of Chimney structure.
material komponen
Steel stack design as per ASME STS-1Full description
chi
Solved
trans 6Full description
design
Excel sheet for Design of RCC and Steel chimney
Descripción: This spreadsheet sheet is developed for design pad and chimney foundation
Full description
This spreadsheet sheet is developed for design pad and chimney foundation
Types of expansion jointsFull description
hjhjhj
Full description
CHIMNEY 1. A boiler uses 2500 kg of coal per hour and air required for combustion is 16 kg per kg coal. If ash loss is 10%, determine the mass of gas entering the chimney? A. 42,250 kg/hr C. 85,452 kg/hr B. 78,300 kg/hr D. 33,800 kg/hr 2. The gas density of chimney is 0.75 kg/m³. If the driving pressure is 0.25 kpa, determine the height of chimney? A. 54.6 m C. 74.6 m B. 63.7 m D. 68.5 m 3. The actual velocity of gas entering in a chimney is 8 m/sec. The gas temperature is 25 °C and pressure of 98 kpa with a gas constant of 0.287 KJ/kg-°K. Determine the chimney diameter if mass of gas is 50,000 kg/hr? A. 1.57 m C. 3.56 m B. 1.81 m D. 1.39 m 4. A coal fired steam boiler uses 3000 kg of coal per hour. Air required for combustion is 15.5 kg per kg of coal at barometric pressure of 98.2 kpa. The flue gas has temperature of 285°C and an average molecular weight of 30. Assuming an ash loss of 11% and allowable gas velocity of 7.5 m/sec, find the diameter of chimney? A. 1.61 m C. 1.81 m B. 1.71 m D. 1.91 m 5. A steam generator with economizer and air heater has an overall draft loss of 21.78 cm of water. If the stack gases are at 177°C and if the atmosphere is at 101.3 kpa and 26°C, what theoretical height of stack in meters is needed when no draft fan are used? Assume that the gas constant for the flue gases is the same as that for air. A. 565 C. 545 B. 535 D. 550 6. If the actual draft required for a furnace is 6.239 cm of water and the frictional losses in the stack are 15% of the theoretical draft, calculate the required stack height in meters. Assume that the flue gas have an average temperature of 149°C and molecular weight of 30. Assume air temperature of 21°C. A. 215 C. 220 B. 230 D. 210 7. A steam boiler plant consumes 9000 kg of coal per hour and produces 20 kg of dry flue gases per kg of coal fired. Outside air temperature is 32°C, average temperature of the flue gas entering the chimney is 343°C and average temperature of dry flue gas in the chimney is 260°C. The gage fluid density is 994.78 kg per cubic meters and the theoretical draft of 2.286 cm of water at the chimney base is needed when the barometric pressure is 760 mmHg. Determine the height of the chimney. A. 46 C. 40 B. 50 D. 56
