# A small steam superheater will be made of 0.75-in. schedule 80 stainless steel pipe which will be exposed to hot flue gas from a boiler. 50 lbm/h of saturated steam at 320F will enter the pipe and be heated to 380F. Assuming that the pipe wall temperature will vary from 375F at the steam inlet to 415F at the outlet, calculate the length of pipe required for the superheater.Ans. 6.1 ft.

Question
1. A small steam superheater will be made of 0.75-in. schedule 80 stainless steel pipe which will be exposed to hot flue gas from a boiler. 50 lbm/h of saturated steam at 320F will enter the pipe and be heated to 380F. Assuming that the pipe wall temperature will vary from 375F at the steam inlet to 415F at the outlet, calculate the length of pipe required for the superheater.

Ans. 6.1 ft.

Step 1

The following conditions are given in the question:

Step 2

The average bulk fluid temperature and wall temperature is calculated as below

Step 3

Properties of saturated steam can be obtaine...

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