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

Electric Kilowatt Hours (kWh)

Required number input.

Fuel Lhv Kilowatt Hours (kWh)

Required number input.

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

Efficiency Percent (%)

The resulting efficiency percent returned as a number.

• Fuel-cell efficiency depends on lower or higher heating-value convention, voltage, current density, fuel utilization, auxiliary loads, temperature, pressure, purity, water management, and degradation. Stack electrical efficiency is not total system efficiency.
• 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.

• Chiller Cop

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

• 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.