Design of any heat exchanger is manly depend upon the flow configuration.
As discussed before the configuration could be of three type (majourly)

  1. Parallel Flow
  2. Counter Flow
  3. Cross Flow

The compactness increases from Parallel flow to Counter Flow to Cross Flow

While complexity increases in reverse direction.

The superheater has flue gas on one side & Ideal gas on other. As steam has less capacity of carring the heat than water, we have to give more area.

The velocity of steam & flue gas plays a majour role in deciding the compact ness of heat exchanger.
More the velocity, more will be reynold’s number, higher will be nusselt number, higher will be heat transfer co-efficient which leads to higher over all heat transfer co-efficient & hence
lesser Area.

Leave a comment

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.