Calorimetry check
Excess Heat and COP Calculator
Turn a cold-fusion or LENR heat claim into COP, input energy, output energy, excess energy, and an uncertainty range before deciding whether the number is meaningful.
Key facts
Key facts
Inputs
Power + time
Enter input watts, output thermal watts, duration, and a combined measurement uncertainty.
Outputs
COP + energy
The calculator reports coefficient of performance and net excess energy in Wh, kWh, and MJ.
Boundary
Browser only
All calculations happen locally in the page; no measurements or claims leave the browser.
Common measurement pitfalls
Calibration drift
Small heat-loss or sensor changes can mimic a persistent low-percent excess.
Gas recombination
Hydrogen and oxygen recombining inside or near the cell can return heat that was assumed lost.
Steam and phase change
Boiling, mist, and water inventory errors can make output heat look larger than it is.
Hidden input paths
Unmeasured electrical, RF, chemical, flow, or mechanical inputs can dominate a claimed anomaly.
Measurement standard
Numbers are a filter, not a verdict
These tools are designed for first-pass evaluation. A striking COP, timeline entry, or energy-density result should lead to better questions: Were blanks run? Were all energy paths measured? Was the protocol repeated independently? Does a nuclear signature scale with the claimed heat?
For the consensus baseline, read the scientific verdict. For the measurement pitfalls behind the calculator, read the replication crisis.
FAQ
Common questions
What does COP mean in an excess heat claim?
COP is output thermal power divided by input power. A COP above 1 is interesting only if all input paths, calibration errors, and chemical sources are bounded.
Does excess heat prove cold fusion?
No. Excess heat can be a clue, but a fusion interpretation also needs reproducible controls and nuclear signatures consistent with the claimed reaction.
Why include an uncertainty field?
Small calorimetry errors can create apparent anomalies. The uncertainty band shows whether the claimed excess remains large after measurement error is considered.