Saturated steam feeds from a large pressurised tank to a condenser with a fixed mass flow...
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Saturated steam feeds from a large pressurised tank to a condenser with a fixed mass flow rate of 0.07 kg/s. The length of the inlet pipe is 20 m, its diameter is 25 mm, and it is made from forged steel. The density of the steam is 864 kg/m and its dynamic viscosity is 1.57 105 kg/m s. From the outlet of the condenser, saturated water passes through another pipe. The length of the outlet pipe is 50 m, its diameter is 50 mm, and it is made from forged steel. The density of the water is 1000 kg/m and its dynamic viscosity is 1.14 10-3 kg/m s. a. Calculate the total pressure drop through both pipes (ignore the con- denser). b. After some time, it is expected that the pipes will rust. Calculate the pres- sure drop once this takes place. Assume that the diameter of the pipes does not change significantly. c. Suggest at least two alternative designs that might avoid corrosion and min- imise the pressure drop, and what may be their advantages and disadvant- ages. Saturated steam feeds from a large pressurised tank to a condenser with a fixed mass flow rate of 0.07 kg/s. The length of the inlet pipe is 20 m, its diameter is 25 mm, and it is made from forged steel. The density of the steam is 864 kg/m and its dynamic viscosity is 1.57 105 kg/m s. From the outlet of the condenser, saturated water passes through another pipe. The length of the outlet pipe is 50 m, its diameter is 50 mm, and it is made from forged steel. The density of the water is 1000 kg/m and its dynamic viscosity is 1.14 10-3 kg/m s. a. Calculate the total pressure drop through both pipes (ignore the con- denser). b. After some time, it is expected that the pipes will rust. Calculate the pres- sure drop once this takes place. Assume that the diameter of the pipes does not change significantly. c. Suggest at least two alternative designs that might avoid corrosion and min- imise the pressure drop, and what may be their advantages and disadvant- ages.
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