Analyzing Internally Reversible Flow ProcessesLiquid water
Chapter 6, Problem 180P(choose chapter or problem)
Liquid water at \(70^{\circ} \mathrm{F}, \ 14.7 \mathrm{\ lbf} / \mathrm{in}^{2}\) 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 \(250 \mathrm{\ lbf} / \mathrm{in} .^{2}\), 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 \(g=32.2 \mathrm{\ ft} / \mathrm{s}^{2}\).
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