Question

Propane gas enters a continuous adiabatic heat exchanger 240°C. Superheated steam at 300 C and 5 bar enters the exchanger flowing countercurrently to the propane and exits as a saturated liquid at the same pressure at 40 C and 250 kPa and exits at Taking flow chart. Include both mass and volumes on your inlet and outlet streams. b. Calculate the specific enthalpy values for the inlet and outlet streams. c. Use an energy balance to calculate the required mass feed rate of the steam. Then calculate the volumetric feed ratio of the two streams (m2 steam/ m2 propane). Ideal gas behavior can be assumed for the propane d. Calculate the heat transferred from the water to the propane (kJ/m2 propane) Over a period of time, scale builds up on the heat transfer surface, resulting rate of heat transfer between the propane and steam. What changes in the outlet stream would you expect to see as a result of the decreases heat transfer? a basis of 100 mol propane fed to the exchanger, draw and label a process a. in a lower e.

Answer 1

So loo mal GHeltoc, 250kfa

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