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

Outlet Celsius (°C)

Required number input.

Wet Bulb Celsius (°C)

Required number input.

Cooling-tower approach temperature as cooled-water outlet temperature minus ambient wet-bulb temperature. 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]

Approach Kelvin (K)

The resulting approach kelvin 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.

• Humid Air Enthalpy

  Moist-air enthalpy per kg dry air from dry-bulb Celsius temperature and humidity ratio; standard HVAC approximation at ordinary pressure.

• Cable Sizing Current Capacity

  Usable conductor current rating from a supplied base ampacity times installation and temperature derating factors; not a code sizing determination.

• Chiller Cop

  Chiller coefficient of performance as cooling output divided by electrical input power, in matching power units.