Consider a heat exchanger that has 1000, (2.5 mathrm{~cm}) diameter smooth tubes in parallel, each (6 mathrm{~m})
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Consider a heat exchanger that has 1000, \(2.5 \mathrm{~cm}\) diameter smooth tubes in parallel, each \(6 \mathrm{~m}\) long. The total water flow of \(1 \mathrm{~m}^{3} / \mathrm{s}\) at \(10^{\circ} \mathrm{C}\) flows through the tubes. Neglecting entrance and exit losses, determine:
a. The pressure drop (in \(\mathrm{kPa}\) ).
b. The pumping power required (in \(\mathrm{kW}\) ).
c. The pumping power for the same flow rate if solid deposits from the water build up on the inner surface of the pipe with a thickness of \(1 \mathrm{~mm}\) and an equivalent roughness of \(0.4 \mathrm{~mm}\).
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