Liquid water at 708F, 14.7 lbf/in.2 , and a velocity of 30

Chapter 6, Problem 6.180

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Liquid water at 70\(^{\circ}\)F, 14.7 lbf/in.\(^{2}\) , and a velocity of 30 ft/s enters a system at steady state consisting of a pump and attached piping and exits at a point 30 ft above the inlet at 250 lbf/in.\(^{2}\) , a velocity of 15 ft/s, and no significant change in temperature. (a) In the absence of internal irreversibilities, determine the power input required by the system, in Btu per lb of liquid water flowing. (b) For the same inlet and exit states, in the presence of friction would the power input be greater or less than determined in part (a)? Explain. Let g = 32.2 ft/s\(^{2}\).