Water A shell-and-tube heat exchanger will heat 2.1 kg/s of ethyl alcohol using hot water. The ethyl alcohol (C=2670 J/kg °C) must be heated in the tubes from 25°C to 70°C. Hot water (Cp = 4190 J/kg °C) at 95°C is available entering the shell side and must leave at 45°C. What is the water flowrate? 70°C Ethyl alcohol 25°C 2.1 kg/s 95°C 45°C (8-tube passes) The heat transfer coefficient for the shell side (the outside of the tubes) has been found to be hout 250 W/m2K. The inside tube diameter is 10 cm. What is the heat transfer coefficient inside the tubes? (for ethyl alcohol assume all properties are constant, p=760 kg/m³, v=5.2*10-7 m2/s, k = 0.196 W/mK, P-5.4, u doesn't change) And what is the heat exchanger's overall heat transfer coefficient (U) ignoring any thermal resistance through the tube walls and assuming the heat exchanger is new (un-fouled)? What size heat exchanger is needed to achieve these desired exit temperature conditions for the given ethyl alcohol and water flow rates and entry temperatures? The desired flow orientation (inlet and outlet locations for the two fluids) is shown in the previous figure. Area = m² After modifications to the facility, the hot water supply system is going to change. Now, 80°C hot water at a rate of 1.0 kg/sec is available. The ethyl alcohol conditions will also be revised to 2.0 kg/s at an inlet temperature of 30°C. What will the exit temperatures be for the water and ethyl alcohol?