Problem 2 10 points To generate saturated steam at 40 atm tw

Problem 2: (10 points) To generate saturated steam at 40 atm, two processes are proposed: Process A: vaporize water at 1 atm, and compress the low pressure steam to 40 atm, and heat the steam to the saturation temperature, if needed. Process B: pump water to 40 atm, apply heat to vaporize the water Which process would you prefer? Why?

Solution

Part B is preferred because the amount of work supplied to pump is low while compared to the parts process...

Explanation:

In part A the water is completely converted into vapour so the specific volume is increased so the work required is directly proportional to volume.. So the power required is more in partA

In part B the water is in liquid state so specific volume is low that means power required is less..

So partB is preferred