Should LMTD be used in calculating heat load?

kwisatz_haderach · Mar 15, 2024

Sorry if this question is basic. I'm reading Pressure vessel design manual by dennis moss and in "chapter 6: related equipment" he used LMTD to calculate the heat load/heat required, but shouldn't actual temperature difference be used which gives the actual heat energy to be given to the process fluid. LMTD will be less than actual temperature difference isn't it? Is he wrong or am i missing something?
Thanks in advance.

IRstuff · Mar 15, 2024

LMTD is typically used where the temperature difference is not a constant value, where it varies across the breadth or length of the heat transfer interface.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

faq731-376 forum1529 Entire Forum list

http://www.eng-tips.com/forumlist.cfm

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Should LMTD be used in calculating heat load?

kwisatz_haderach

Mechanical

Recommended for you

IRstuff

Aerospace

Similar threads

Part and Inventory Search

Sponsor