3 replies to this topic

[panoskagiou]

Dear all,

 

What are the cases in which the LMTD cannot be used?

What is the zone analysis used in the exchangers?

 

Thank you in advance!

[srfish]

The standard LMTD can should not be use if there is not a straight line heat release.

[panoskagiou]

I did understand you!

[sgkim]

LMTD can not be calculated if one of end point differential temperatures is the same as the other,    (LMTD =   (Δt1 - Δt2)/ln (Δt1 / Δt2),  ln 1 = Error)

 

Zone analysis should be used if significant difference or heat-duty is involved in the particular zone of a exchanger.

 

Stefano, Kim