Heat Exchanger Design Tool
Heat exchanger sizing is essential for process design and thermal engineering.
This tool calculates the Log Mean Temperature Difference (LMTD) and the required heat transfer area based on inlet/outlet temperatures and heat load — useful for HVAC, refinery, power plant, and industrial applications.
LMTD & Heat Transfer Area Calculator
Enter hot inlet & outlet temperatures.
Enter cold inlet & outlet temperatures.
Enter heat load (Q) in kW.
Enter overall heat transfer coefficient (U).
Click Calculate to compute:
LMTD (°C)
Required heat transfer area (m²)
🧭 How to Use
FAQ
Q1. What is LMTD in heat exchangers?
LMTD (Log Mean Temperature Difference) quantifies the average driving force for heat transfer.
Q2. Can this calculate shell-and-tube area?
Yes — area formula applies to all basic heat exchangers.
Q3. Does this include correction factors (F)?
No — this calculator is for pure LMTD and area. F-factor must be applied manually for multi-pass exchangers.
Q4. What U value should I use?
Typical ranges: Gas–gas: 30–100, Liquid–liquid: 300–1000, Condenser: 1000–3000