6. (10 points) A liquid (SG=1.75, u=1.08 cp) flows through the coils of the heat exchanger (8=0.000005 ft) shown below at a rate of 2.0 gal/min. Values for L and coil pipe diameter (D) are 36 and 0.75 inches, respectively. Determine the pressure drop (psi) between the inlet and outlet of the heat exchanger. Note that the loss coefficient (KL) for a threaded return bend is 1.5. L Threaded 180° return bend Coil Diameter, D
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