Andrea Rossi has been consistent in saying that his E-Cat systems have a Coefficient of Performance (COP) of 6 — meaning that the total energy output of an E-Cat is six times the amount of energy input. Many of us have wondered whether this number is based upon Rossi’s current design, and if it can be improved upon in the future. A question about this was raised on Rossi’s Journal of Nuclear Physics Blog: Q: Have you found some very fundamental physical reasons to this limitation (which you will publish some day) or is this just because of the current engineering choices

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Rossi Says E-Cat COP Fixed at 6