Heat has always been something we thought we understood. From baking bread to running engines, the idea seemed simple: heat spreads out smoothly, like water soaking through a sponge. That simple ...

A schematic illustration of the biochemical heat engine model that achieves maximum power while approaching Carnot efficiency. The left panel shows the two-state engine, where the higher energy state ...

We propose a recipe for demonstrating an autonomous quantum heat engine where the working fluid consists of a harmonic oscillator, the frequency of which is tuned by a driving mode. The working fluid ...

Scientists in Sweden experimentally evaluated a Stirling engine–based Carnot battery (SECB) prototype using low-cost sand as thermal energy storage, aiming to validate ...

Heat transfer in internal combustion engines governs both performance and durability by controlling temperatures within the combustion chamber, cylinder walls, piston crown and cylinder head.