Use this engineering calculation for a transparent preliminary estimate or independent arithmetic check when geometry, materials, loads, operating conditions, and units are defined consistently.

Overall Watts Per Square Meter Kelvin (W/(m²·K))

Required number input.

Area Square Meters (m²)

Required number input.

Corrected Lmtd Kelvin (K)

Required number input.

Steady heat-exchanger duty Q=U A ΔTlm for a supplied overall coefficient, reference area and already-corrected LMTD. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Duty Watts (W)

The resulting duty watts returned as a number.

• Heat-transfer estimates depend on geometry, contact resistances, radiation, convection regime, temperature-dependent properties, fouling, phase change, and boundary conditions. Tabulated coefficients and COP values are operating-condition specific.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check assumptions against drawings, measurements, current material data, and the applicable design code. Apply required load combinations and safety factors, then obtain qualified review and testing for consequential designs.

• Drag Force

  Steady aerodynamic or hydrodynamic drag ½ρv²CdA using supplied reference area and drag coefficient.

• Lift Force

  Steady lift ½ρv²ClA using supplied signed lift coefficient and reference area.

• Overall Heat Transfer Coefficient

  Area-based overall heat-transfer coefficient from three supplied thermal resistances per unit area in series.