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In a steam condenser, saturated steam enters the shell at 10 kPa and condenses into saturated liquid at the same pressure. Water enters the tubes at 25^∘ C and flows at the rate of 200 kg / s. The mass of steam condensed is 6 kg / s. Determine (a) the outlet temperature of the water, (b) the hot-side heat transfer area if the condenser is in a one shell-two tube pass arrangement with an overall hot-side heat transfer coefficient of UH=2500 W / m^2-K. | Numerade
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Oil at 10^∘ C is to be heated by saturated steam at 1 atm in a double-pipe heat exchanger to a temperature of 30^∘ C. The inner and outer diameters of the annular space are 3 cm and 5 cm , respectively, and oil enters at with a mean velocity of 0.8 m / s. The inner tube may be assumed to be isothermal at 100^∘ C, and the outer tube is well insulated. Assuming fully developed flow for oil, determine the tube length required to heat the oil to the indicated temperature. In reality, will you need a
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SOLVED:Consider a Rankine cycle with saturated steam leaving the boiler at a pressure of 2 MPa and a condenser pressure of 10 kPa. (a) Calculate the thermal efficiency of the ideal Rankine cycle for these operating conditions. (b) If the net reversible work for the cycle is 0.5 MW, calculate the required flow rate of cooling water supplied to the condenser at 15^∘ C with an allowable temperature rise of 10^∘ C. (c) Design a shell-and-tube heat exchanger (one-shell, multiple-tube passes) that wil
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A manufacturing facility requires saturated steam at 120^∘ C at a rate of 1.2 kg / min. Design an electric steam boiler for this purpose under these constraints: ● The boiler will be in cylindrical shape with a height-todiameter ratio of 1.5. The boiler can be horizontal or vertical. FIGURE P10–91 can't copy ● The boiler will operate in the nucleate boiling regime, and the design heat flux will not exceed 60 percent of the critical heat flux to provide an adequate safety margin. ● A commerciall
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