"energy is neither created nor destroyed"
The boundary is the argument
Every claimed energy device has an implicit boundary. If the boundary excludes a battery, a charged capacitor, compressed gas, a chemical fuel, a thermal reservoir, a falling weight, a hidden wire, or environmental heat, the resulting energy balance can look better than reality.
A clear boundary converts a vague claim into a technical statement. The input side lists electricity, fuel, mass flow, stored charge, mechanical work, heat, radiation, and any environmental coupling. The output side lists electrical work, mechanical work, heat, chemical products, acoustic output, light, and stored energy remaining at the end of the test.
The first law protects the ledger
The first law does not say useful machines are impossible. It says energy changes form and location. A generator can convert mechanical work into electricity. A battery can convert chemical potential into electrical work. A heat pump can move environmental heat indoors. None of those examples creates energy from nothing.
That distinction matters for free-energy claims. If a device appears to produce excess output, the first question is not whether physics has failed. It is whether the boundary missed an input, whether the output was overmeasured, whether stored energy was depleted, or whether the measurement uncertainty is larger than the claimed surplus.
The second law limits quality, not just quantity
Energy quantity is conserved, but energy quality changes. Heat at room temperature is not as useful for work as the same energy in a charged battery or a falling mass. The second law captures why real conversions have direction and why waste heat appears.
That is why a claim can respect the first law and still fail. A device might conserve energy but promise impossible conversion efficiency, such as converting a single-temperature heat bath entirely into work in a closed cycle. Entropy accounting catches these claims.
A COP above 1 can be normal
Coefficient of performance is not the same as energy efficiency. A heat pump can deliver more heat energy to a building than the electrical energy it consumes because it moves heat from outside air, water, or ground into the conditioned space.
Calling that "over-unity" is misleading. The extra heat is an input crossing the boundary from the environment. The correct boundary includes both the electrical work and the environmental heat moved by the refrigerant cycle.
FAQ
Does a COP above 1 prove free energy?
No. It can simply mean the device moves energy from an environmental reservoir, as heat pumps do.
What would make an over-unity result interesting?
A long-duration, independently replicated test with calibrated instruments, a complete boundary, and an uncertainty budget smaller than the claimed excess.
Cite this page
Free Energy Research. "The Physics Boundary: Conservation, Entropy, and Useful Work." Updated 2026-07-06. Accessed from https://freeenergyresearch.org/physics.
https://freeenergyresearch.org/physicsPrimary sources
- First Law of Thermodynamics NASA Glenn Research Center
Plain-language statement of energy conservation and energy accounting for thermodynamic systems.
- Second Law of Thermodynamics NASA Glenn Research Center
Explains entropy and why real processes impose direction and losses.
- Heat Pump Systems U.S. Department of Energy
DOE Energy Saver guide showing why heat pumps can deliver more heat than their electrical input by moving heat.
- SI Units National Institute of Standards and Technology
Official U.S. reference for joule, watt, ampere, kelvin, and other measurement units used in test plans.