D 1 Polymer solution Density Pp Viscosity Hp Flow rate Qp 1.4 m Glycerin Flow rate lg In a polymer plant, a heat exchanger cools a polymer solution by approximately 25C from an inlet temperature of 70C as it flows through the heat exchanger shown in the figure. The engineer would like to be able to cool the polymer solution by as much as 40C as it passes through the heat exchanger. The heat exchanger is currently in use, so he would like to build a 1/6-scale model for testing purposes. In the model, water will be used instead of the polymer solution. What water flow rate is needed in the model? Your answer should be in m2/h. Pp=1089.4 kg/m3, Mp=0.0055 N.s/m2, Qp=12.5 m3/h Qg=55.9 m3/hr