Results 31 to 40 of about 186,999 (315)

Energy and exergy analysis of a flat plate collector using collector test equations [PDF]

open access: yesE3S Web of Conferences, 2020
This paper presents the energetic and exergetic analysis of a widely used flat plate collector based on the collector testing equations. The evaluation of the performances of the collector is done under the climatic conditions corresponding to a typical ...
Gheorghian Adina-Teodora   +2 more
doaj   +1 more source

Nonequilibrium Thermodynamics in Biochemical Systems and Its Application

open access: yes, 2021
Living systems are open systems, where the laws of nonequilibrium thermodynamics play the important role. Therefore, studying living systems from a nonequilibrium thermodynamic aspect is interesting and useful.
Dongliang Zhang, Qi Ouyang
core   +1 more source

Framework for Automated Data-Driven Model Adaption for the Application in Industrial Energy Systems

open access: yesIEEE Access, 2021
Increasing flexibility and efficiency of energy-intensive industrial processes is generally seen as a big lever towards a decarbonized energy system of the future.
Leopold Prendl   +3 more
doaj   +1 more source

Gravitational thermodynamics [PDF]

open access: yesComplexity, 1997
The gravitational N-body problem, for $N>2$, is the oldest unsolved problem in mathematical physics. Some of the most ideal examples that can be found in nature are globular star clusters, with $N \sim 10^6$. In this overview, I discuss six types of fundamental sources of unpredictability, each of which poses a different challenge to attempts to ...
openaire   +2 more sources

On phantom thermodynamics [PDF]

open access: yesPhysics Letters B, 2008
The thermodynamic properties of dark energy fluids described by an equation of state parameter $ω=p/ρ$ are rediscussed in the context of FRW type geometries. Contrarily to previous claims, it is argued here that the phantom regime $ω0$ and $S>0$ in the course of the Universe expansion.
Pereira, S. H., Lima, J. A. S.
openaire   +2 more sources

Functionalized Controlled Porous Glasses for Producing Radical-Free Hyperpolarized Liquids by Overhauser DNP

open access: yesMolecules, 2022
Overhauser dynamic nuclear polarization (ODNP) can be used as a tool for NMR signal enhancement and happens on very short time scales. Therefore, ODNP is well suited for the measurement of fast-flowing samples, even in compact magnets, which is ...
Raphael Kircher   +3 more
doaj   +1 more source

Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO2 charging process

open access: yesEnergy Science & Engineering, 2023
Pumped thermal energy storage (PTES) is a technology for intermediate storage of electrical energy in the form of thermal energy. In this work, PTES systems based on a transcritical CO2 charging process are investigated.
Jonas Bodner   +3 more
doaj   +1 more source

Physicochemical Mechanics and Nonequilibrium Chemical Thermodynamics

open access: yes, 2023
Equilibrium thermodynamics answers the question, “by how much?” Nonequilibrium thermodynamics answers the question “how fast?” The physicochemical mechanics approach presented in this article answers both of these questions.
Nikolai Meerovich Kocherginsky
core   +1 more source

Thermodynamic holography [PDF]

open access: yesScientific Reports, 2015
AbstractThe holographic principle states that the information about a volume of a system is encoded on the boundary surface of the volume. Holography appears in many branches of physics, such as optics, electromagnetism, many-body physics, quantum gravity and string theory. Here we show that holography is also an underlying principle in thermodynamics,
Bo-Bo Wei, Zhan-Feng Jiang, Ren-Bao Liu
openaire   +3 more sources

Entropy and the Second Law of Thermodynamics—The Nonequilibrium Perspective

open access: yes, 2020
An alternative to the Carnot-Clausius approach for introducing entropy and the second law of thermodynamics is outlined that establishes entropy as a nonequilibrium property from the onset.
Henning Struchtrup, Struchtrup, Henning
core   +1 more source

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