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Saturated steam at 0.14 bar is condensed in a shell-and- tube heat exchanger with one shell pass and two tube passes consisting of 130 brass tubes, each with a length per pass of 2 m. The tubes have inner and outer diame- ters of 13.4 and 15.9 mm, respectively. Cooling water enters the tubes at 20°C with a mean velocity of 1.25 m/s. The heat transfer coefficient for condensation on the outer surfaces of the tubes is 13,500 W/m2 · K.
(a) Determine the overall heat transfer coefficient, the cooling water outlet temperature, and the steam condensation rate.
(b) With all other conditions remaining the same, but accounting for changes in the overall coefficient, plot the cooling water outlet temperature and the steam condensation rate as a function of the water flow rate for 10 mc 30 kg/s.
A rigid sealed 50 liter tank contains Argo at a pressure of 5 MPa and 400K. What is the mass of argon inside?
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