Evaporator Pinch
Evaporator Pinch
(OP)
What does evaporator pinch, or approach temperature mean and how it affects HRSG Design ?
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: Evaporator Pinch
Typically values are 8 to 10 degrees C, although I have seen values as low as 7 degrees C. In very simple terms, the lower the pinch point the higher the steam generation but the larger the required surface area of the evaporator and hence cost.
The relationship between pinh point and required area is not linear since it depends on the Log Mean Temperature Difference.
Regards,
athomas236