Consider the pharmaceutical product of .27.Prior to

Chapter 8, Problem 8.106

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Consider the pharmaceutical product of 8.27.Prior to finalizing the manufacturing process, test trialsare performed to experimentally determine the depen-dence of the shelf life of the drug as a function of thesterilization temperature. Hence, the sterilization tem-perature must be carefully controlled in the trials. Topromote good mixing of the pharmaceutical and, inturn, relatively uniform outlet temperatures across theexit tube area, experiments are performed using adevice that is constructed of two interwoven coiledtubes, each of 10-mm diameter. The thin-walled tubingis welded to a solid high thermal conductivity rod ofdiameter Dr?40 mm. One tube carries the pharma-ceutical product at a mean velocity of up?0.1 m/s andinlet temperature of 25C, while the second tube carriespressurized liquid water at uw?0.12 m/s with an inlettemperature of 127C. The tubes do not contact eachother but are each welded to the solid metal rod, witheach tube making 20 turns around the rod. The exteriorof the apparatus is well insulated a) Determine the outlet temperature of the pharmaceu-tical product. Evaluate the liquid water properties at 380 K.(b) Investigate the sensitivity of the pharmaceuticalsoutlet temperature to the velocity of the pressurizedwater over the range 0.10uw0.25 m/s.