Heat Exchanger Area Calculator: worked example
This example is generated from PROFENG's own default input set and the implemented relationship. It is not copied from a cited publication.
Relationship
A = Q̇/(U LMTD)
This calculator determines required area from heat duty, overall u-value, lmtd. Use it to screen energy, temperature and heat-transfer relationships with explicitly stated properties and boundary conditions.
Inputs
- Heat duty (duty) = 300 kW
- Overall U-value (u) = 500 W/(m²·K)
- LMTD (lmtd) = 30 K
Working
(300)*1000/((500)*(30)) = 20 m²
Required area: 20 m²
Assumptions and limits
- Properties entered by the user are treated as constant over the calculation unless the formula explicitly varies them.
- Temperatures and temperature differences must use the unit convention shown by the calculator.
- The model is lumped or one-dimensional where implied by the displayed relationship.
- A formula-level published source has not yet been confirmed for this exact implementation.
- Until the source is confirmed, use the displayed relationship only as a transparent screening implementation and independently check the method before engineering decisions.
Formula source and acknowledgement
Source being confirmed. No candidate title is displayed until the exact relationship is confirmed against an approved published source.
Automated verification passed – 30 September 2026 – six numerical cases checked, with dimensional checks and an independent implementation where applicable.
This worked example is for engineering screening and education. Replace defaults with traceable project data and confirm the method, assumptions, standards and equipment information before design, procurement or operation.