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

Cooling Watts (W)

Required number input.

Input Watts (W)

Required number input.

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

Coefficient Of Performance

The resulting coefficient of performance 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.

• Fuel Cell Efficiency

  Fuel-cell electrical efficiency from electric output energy divided by fuel lower-heating-value input energy.

• Pump Efficiency

  Pump hydraulic efficiency from hydraulic output power divided by shaft input power.

• Transformer Efficiency Simple

  Transformer efficiency as output real power divided by input real power.