What does this research mean for the field?

A centrifugal gas cycle utilizing heavy working fluids generates radial temperature gradients that invalidate the Zeroth and Second Laws of thermodynamics, achieving thermal efficiencies that exceed the Carnot limit. Novelty: ClaimNovelty.CONTRADICTORY. Consensus alignment: ConsensusAlignment.CHALLENGES_CONSENSUS.

What question did this study set out to answer?

To determine whether a gas thermodynamic cycle operating inside a quasi-static centrifugal force field can surpass the theoretical Carnot efficiency limit.

September 2, 2026F1000ResearchOpen Access

A Work Cycle with Thermal Efficiency Exceeding the Carnot Limit in a Centrifugal Field

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To determine whether a gas thermodynamic cycle operating inside a quasi-static centrifugal force field can surpass the theoretical Carnot efficiency limit.
Derived isothermal and non-isothermal radial temperature and pressure relations using molecular dynamics and energy equipartition principles.
Modeled external work-driven radial gas transport and buoyancy-assisted heating circulation across varied rotational speeds, molar masses, and temperature increments.
Built a laboratory prototype utilizing octafluoropropane (C3F8) working gas to measure motor work and semiconductor heating input.
Direct heating cycles achieved thermal efficiencies of 1.55 to 1.75 at small temperature increments, with work output-to-input ratios exceeding 1000.
Laboratory testing achieved an average energy conversion ratio of 2.69 (P = 0.002), exceeding standard Carnot combined cycle limits at angular velocities between 180 and 310 rad/s.

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Implication

Experimental study demonstrates thermal efficiency exceeding Carnot limits in a centrifugal gas cycle, suggesting potential for low-grade waste heat harvesting.

Cite This Study

Zhu et al. (2026) studied this question.

synapsesocial.com/papers/6a97e28dc562ede874ec6c1b https://doi.org/10.12688/f1000research.188781.1

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Implication

Experimental study demonstrates thermal efficiency exceeding Carnot limits in a centrifugal gas cycle, suggesting potential for low-grade waste heat harvesting.

A Work Cycle with Thermal Efficiency Exceeding the Carnot Limit in a Centrifugal Field

Key Points

Discussion

Implication

Cite This Study

A Work Cycle with Thermal Efficiency Exceeding the Carnot Limit in a Centrifugal Field

Key Points

Discussion

Implication

Cite This Study

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