High-efficiency hybrid cycle

Thermodynamics
The classical Carnot heat engine
Branches Classical Statistical Chemical Equilibrium / Non-equilibrium
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Material properties Specific heat capacity  $c=$ $T$ $\partial S$ $N$ $\partial T$ Compressibility  $\beta=-$ $1$ $\partial V$ $V$ $\partial p$ Thermal expansion  $\alpha=$ $1$ $\partial V$ $V$ $\partial T$ Property database
Equations Carnot's theorem Clausius theorem Fundamental relation Ideal gas law Maxwell relations Onsager reciprocal relations Bridgman's thermodynamic equations Table of thermodynamic equations
Potentials Free energy Free entropy Internal energy $U(S,V)$ Enthalpy $H(S,p)=U+pV$ Helmholtz free energy $A(T,V)=U-TS$ Gibbs free energy $G(T,p)=H-TS$
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Scientists Bernoulli Carnot Clapeyron Clausius Carathéodory Pierre Duhem Gibbs von Helmholtz Joule Maxwell von Mayer Onsager Rankine Smeaton Stahl Thompson Thomson (Baron Kelvin) Waterson

The high-efficiency hybrid cycle (HEHC) is a new 4-stroke thermodynamic cycle combining elements of the Otto cycle, Diesel cycle, Atkinson cycle and Rankine cycle.

HEHC engines

The 3rd generation design of the LiquidPiston Engine currently in development is the only engine currently designed around the HEHC. It is a rotary combustion engine.

External links

• LiquidPiston Inc. The company designing the first HEHC-based engine.