Water at 15°C is supplied to a one-shell-pass, two-tube-pass heat to cool 10 kg/s of liquid ammonia from 120°C to 40°C. You anticipate a U on the order of 1500 W/m2K when the water flows in the tubes. If A is to be 90m2, choose the correct flow rate of water.  Question from A Heat Transfer Textbook, 5th Edition, Problem 3.17

Consider two heat exchanger configurations: parallel-flow and counter-flow. For both configurations cooling water at a flow rate of 1.5 kg/s enters the heat exchanger at 30°C and exits at 45.1°C. This water cools unused engine oil at a flow rate of 1 kg/s from 95°C to 50°C. Both configurations have the same overall heat transfer coefficient of 9,000 W/m2/K. Determine the following: 1. What is the required heat transfer area for each configuration? 2. Give that both configurations have the same inlet and outlet temperatures, what is the basis of the different areas calculated in part a?

Question #7 Steam at 320°C flows in a stainless steel pipe (k-15W/m K) whose inner and outer diameter are 5cm and 5.5cm respectively. The pipe is covered with 3cm thick glass wool insulation (-0.038W/mK). Heat is lost to the surroundings at 5°C by natural convection and radiation, with a combined natural convection and radiation heat transfer coefficient of h 15W/m² K. Taking the heat transfer coefficient inside the pipe to be happe = outside pipe = 80 W/m²K. (A) Draw the schematic diagram of this problem and label all quantities. (B) Draw the thermal network diagram of this problem and label all thermal resistors and the direction of heat flow. (C) Determine the (i) inner surface area (ii) outer surface area (iii) inner thermal resis- tance (iv) outer thermal resistance (v) thermal resistance across pipe and (vi) thermal resistance across insulation. (D) Determine the total thermal resistance for the unit length of pipe. (E) Determine the rate of heat loss from the steam per unit…

An incompressible fluid flows through a rectangular cross section duct, with width much larger than height of the cross section. The duct surface is heated at a uniform rate along its length. If the centreline of the flow is along the centre of the duct where y = 0, the distance from the centreline to the surface of the duct is b = 25 mm, and the thermal conductivity of the fluid is 0.6 W/mK, what is the local heat transfer coefficient in the developed region of the flow? Give your answer in W/m2K to 1 decimal place.  I AM POSTIING THIS AGAIN. PLEASE STOP ? COPY FROM INTERNET AND SEND RANDOM SOLUTION. HINT THE FINAL  ANSWER IS 38.4 But i need step by step solution.  if you don't get this value don't send it please, reject and add the credit