Gas-to-gas tubular (aluminum tube) heat exchanger (square)
Thread Content
There is a gas-to-gas shell-and-tube (aluminum tube) heat exchanger of square shape. For the air on the cold side, the inlet temperature is 18 degrees Celsius and the outlet temperature is 50 degrees Celsius. On the hot side, the inlet temperature is 80 degrees Celsius and the outlet temperature is 60 degrees Celsius. Is this approach reasonable? What are appropriate flow rates for the air in the tube side and the shell side? What is a reasonable value for the heat transfer coefficient of this heat exchanger?
What is the pressure on each side? When only one side contains air, the heat exchange coefficient is very low; it is likely even lower when both sides contain air. It is recommended to use finned tubes with internal and external fins, as this can reduce the number of heat exchange tubes as well as their outer diameter.