Logarithmic Mean Temperature Difference (LMTD)
Calculates the representative temperature driving force for heat exchange between two process streams, used in the design and rating of heat exchangers.
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1. Define Input Parameters
2. Engineering Output
Heat duty (Q)
- W
- W
Cold outlet temperature (T_c_out)
- °C
- °C
Delta T1 (Delta_T1)
- K
- K
Delta T2 (Delta_T2)
- K
- K
Logarithmic Mean Temperature Difference (Delta_T_lm)
- K
- K
Required heat-transfer area (A)
- m²
- m²
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LMTD is essential for sizing heat exchangers by providing a single, rigorously averaged temperature difference. It ensures the overall heat-transfer coefficient can be treated as constant, simplifying the design equation Q = U A ΔT_lm.
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