April 11, 2019 Name Problem # 1-55 points In the final stages of production, a supply fluid for a...
April 11, 2019 Name Problem # 1-55 points In the final stages of production, a supply fluid for a hospital is sterilized by heating it from 25°C to 80°C, as it moves at 0.2 m/s through a straight thin- walled stainless steel tube of 15-mm diameter, and 10 meter in length. The tube is surrounded by water at 100°C Treating this set-up as a heat exchanger, determine the log-mean temperature difference Assuming zero resistance to heat transfer through the stainless tube, and the h value obtained from an appropriate correlation for internal flow (Nu number inside the tube), write the expression for the overall U assuming same value for h, outside and inside the tube. Assume that the fluid has similar properties to water and use the following data for inside and outside the tube. Density-1000 kg/m3; cp-4000 J/kg.K, H-2x10 kg/s.m, k- 0.8 W/m.K, and Pr -8 Assume fully developed flow inside. Hint: Remember that you will need to find the mass flow rate to determine how much total heat is required to heat the fluid.
April 11, 2019 Name Problem # 1-55 points In the final stages of production, a supply fluid for a hospital is sterilized by heating it from 25°C to 80°C, as it moves at 0.2 m/s through a straight thin- walled stainless steel tube of 15-mm diameter, and 10 meter in length. The tube is surrounded by water at 100°C Treating this set-up as a heat exchanger, determine the log-mean temperature difference Assuming zero resistance to heat transfer through the stainless tube, and the h value obtained from an appropriate correlation for internal flow (Nu number inside the tube), write the expression for the overall U assuming same value for h, outside and inside the tube. Assume that the fluid has similar properties to water and use the following data for inside and outside the tube. Density-1000 kg/m3; cp-4000 J/kg.K, H-2x10 kg/s.m, k- 0.8 W/m.K, and Pr -8 Assume fully developed flow inside. Hint: Remember that you will need to find the mass flow rate to determine how much total heat is required to heat the fluid.