Consider sterilization of the pharmaceutical product of
Chapter 8, Problem 8.101(choose chapter or problem)
Consider sterilization of the pharmaceutical product of 8.27. To avoid any possibility of heating theproduct to an unacceptably high temperature, atmos-pheric steam is condensed on the exterior of the tubeinstead of using the resistance heater, providing a uni-form surface temperature, Ts?100C.(a) For the conditions of 8.27, determine therequired length of straight tube, Ls, that would be needed to increase the mean temperature of thepharmaceutical product from 25C to 75C.(b) Consider replacing the straight tube with a coiledtube characterized by a coil diameter C?100 mmand a coil pitch S?25 mm. Determine the overall length of the coiled tube, Lcl(i.e., the product ofthe tube pitch and the number of coils), necessaryto increase the mean temperature of the pharma- ceutical to the desired value.(c) Calculate the pressure drop through the straighttube and through the coiled tube.(d) Calculate the steam condensation rate.
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