Worked example

Inputs

Hot absolute temperature: 500 K
Cold absolute temperature: 300 K
Hot emissivity: 0.8
Cold emissivity: 0.6
Facing area: 1 m²

Expected results

Effective emissivity: 0.5217391304
Net heat transfer: 1609.400183 W

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

Enter every input in the labeled units; use measured or independently specified properties.
Check the stated model assumptions before calculating.
Interpret the output as a model estimate and verify it independently for the intended application.

Try this example

{
  "hot": 500,
  "cold": 300,
  "e1": 0.8,
  "e2": 0.6,
  "area": 1
}

Accuracy and scope

Very large parallel diffuse-gray plates, view factor one and nonparticipating gap. Educational engineering estimate only; not structural or safety certification, equipment selection, or operating recommendations.

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Radiation between Large Parallel Plates