Calculatorsโ€บHeat Transfer
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Heat Transfer Calculator

GPSA / API Correlations

Heat Duty Calculator (GPSA/API)
Calculates sensible and latent heat duties per GPSA and API Technical Data Book correlations. Use for sizing heaters, coolers, reboilers, and condensers. Heat loss factor accounts for ambient losses (ASTM C680 basis).

Process Parameters

lb/hr

Temperature Conditions

ยฐF
ยฐF

Design Factors

๐Ÿ“š Learn the Theory

Understand conduction/convection/radiation, LMTD, and heat exchanger design

Read Engineering Guide โ†’

Engineering Notes

Calculation Methods:

  • Sensible: Q = แน ร— Cp ร— ฮ”T
  • Latent: Q = แน ร— ฮป (Watson correlation)
  • Combined: Qโ‚ + Qโ‚‚ + Qโ‚ƒ

Design Guidelines:

  • Add 10-15% margin for exchanger fouling
  • Heat loss factor: 2-5% typical for insulated equipment
  • For fired heaters, add 15-20% for radiant/convection losses

References:

  • GPSA, Sec 23-24
  • API Technical Data Book - Petroleum Refining
  • Perry's Chemical Engineers' Handbook

Frequently Asked Questions

What heat transfer modes does this calculator cover?

It calculates heat transfer rates using conduction, convection, and radiation equations.

Does this calculator compute overall heat transfer coefficients?

Yes, it includes overall heat transfer coefficient and thermal resistance calculations.

Is the heat transfer calculator free to use?

Yes, it is a free online engineering calculator with no signup required.

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