Throttling and Joule-Thomson Expansion: ConcepTest and Example Problem

Try to answer this ConcepTest and solve the example problem before using this module. Studies show that trying to answer the questions before studying material improves learning and retention. We suggest that you write down the reasons for your answers. By the end of this module, you should be able to answer these on your own. Answers will be given at the end of this module.

Image for a concepTest for the Throttling and Joule-Thomson Expansion Module
Example Problem 1

Water at 5 MPa and 200°C is feed to a throttle. The outlet pressure is 0.2 MPa.
a. What is the outlet temperature?
b. What phase or phases are present at the outlet? If more than one phase, determine how much of each phase.