Heat engines are thermodynamic physical systems that convert heat energy into mechanical work by exploiting a temperature difference between a high-temperature heat source and a low-temperature heat sink. They operate cyclically, undergoing a sequence of thermodynamic processes (e.g., isothermal, adiabatic, isobaric, or isochoric) that return the working substance to its initial state after each cycle. Their performance is characterized by thermal efficiency, defined as the ratio of net work output to heat input, and fundamentally limited by the Carnot efficiency, which depends solely on the reservoir temperatures and imposes an upper bound dictated by the second law of thermodynamics.
Understanding how wind changes in response to global warming is necessary for accurately modeling climate and weather, identifying risks to infrastructure, and assessing global wind power capacity.
Earth Sciences
Sep 17, 2026
0
12
What is heat, and what is useful work if a machine consists only of an atom and light particles? In modern quantum technologies, this kind of question connects thermodynamics with quantum physics. Researchers at the University ...
General Physics
Aug 17, 2026
0
125
The laws of thermodynamics state that heat naturally flows from hotter systems or regions to colder systems or regions until a state of thermal equilibrium is reached. This simple principle underpins the operation of numerous ...
Speeding in your car to work, to pick up your children from school, or go from one errand to the next not only wastes money in gas and sends harmful emissions into the air, it barely saves you time, new research says.
Environment
Jul 16, 2026
0
28
Recent improvements in our understanding of how the principles of thermodynamics apply in the quantum realm could give a boost to quantum technology, and a clearer picture of quantum thermodynamics could in turn enhance our ...
Quantum Physics
Jul 13, 2026
0
360
Gravity, the force that attracts objects toward each other, is currently framed by Albert Einstein's theory of general relativity. This framework describes gravity as the curvature of spacetime, the invisible four-dimensional ...
Quantum catalysts are specialized resources that enable quantum state transformations previously thought impossible, holding promise for advancements in quantum computing and thermodynamics. A recent international study has ...
Quantum Physics
Mar 17, 2026
0
23
Over the past decades, energy engineers have developed increasingly advanced battery technologies that can store more energy, charge faster and maintain their performance for longer. In recent years, some researchers have ...
New research from the Department of Energy's Oak Ridge National Laboratory, in collaboration with The Ohio State University and Amphenol Corporation, challenges conventional understanding about controlling heat flow in solid ...
Condensed Matter
Mar 5, 2026
1
70
Researchers from Skoltech have published a paper in the journal Physica D: Nonlinear Phenomena presenting an analysis of steady propagating combustion waves—from slow flames to supersonic detonation waves. The study relies ...
General Physics
Feb 26, 2026
0
12
