Consider a flow of water in a cylinder maintained at constant temperature of 1000 C, the diameter of the cylinder is 50 mm and the length of the tube is 6m. The inlet and the outlet temperature of the water is Ti = 150 C and T0 = 570 C . Find the average heat transfer coefficient associated with the flow of water . Mass flow rate is 0.25 Kg/ s and Cp = 4.178 KJ/Kg.K

A liquid food flows in the inner pipe (internal diameter-8 cm) of a double-pipe heat exchanger. The liquid food (p=1200 kg/m and C,-4 kJ/kgK) flows at 0.055 m/min and enters the heat exchanger at 6°C and exits at 38°C. In the annular section, water at 96°C enters the heat exchanger and flows countercurrently at an average flow rate of 1 kg/s (average Cp= 4.18 kJ/kgK). a) Sketch a graph showing the temperature profile of the heating water and quid food through the heat exchanger. Clearly label the two streams and draw arrows to indicate the flow directions of liquid food and water. i) ii) Calculate the mass flow rate (kg/s) of the liquid food. ii) Me sure the temperature (°C) of the exiting water stream. iv) Calculate the log-mean temperature difference for this system. Estimate the length (m) of this pipe heat exchanger that needs to be constructed in order to achieve an overall heat transfer coefficient of 2.5 W/m2K.

Knowing the density, and the volumetric flow rate, omdot P the mass flow rate, mdot can be calculate using the equation o mdot om dot d P² 2 & la 0² 2 PD²

Water at 90C is being pumped from a large storage tank at 1 atm abs at a rate of 0.189 m3/min by a pump. The motor that drives the pump supplies energy to the pump at a rate of 2 hp. The water pumped through a heat exchanger, where it gives up 700 kW of heat and is then delivered to a large open storage tank at an elevation of 20 m above the first tank. What is the final temperature of the water to the second tank? Neglect kinetic energy.