A thermoacoustic-stirling cooler is built and performance measurements are performed. The cooler uses the acoustic power produced by a linear motor to pump heat through a regenerator from a cold heat exchanger to an ambient one. The cooler incorporates a compact acoustic network to create the traveling-wave phasing necessary to operate in a Stirling cycle. The network has a coaxial topology ins...

If the work per cycle of a quantum heat engine is averaged over an appropriate prior distribution for an external parameter a , the work becomes optimal at Curzon-Ahlborn (CA) efficiency. More general priors of the form Π(a) ∝ 1/a(γ) yield optimal work at an efficiency which stays close to CA value, in particular near equilibrium the efficiency scales as one-half of the Carnot value. This featu...

Abstract The efficiency at the maximum power (EMP) for finite-time Carnot engines established with low-dissipation model, relies significantly on assumption of inverse proportion scaling irreversible entropy generation Δ S (ir) operation time τ , i.e. ∝ 1/ . optimal isothermal process EMP has to be within valid regime scaling. Yet, such consistency was not tested due unknown coefficient -scalin...

Abstract In the present work, a power law dissipative Carnot-like heat engine cycle of two irreversible isothermal and adiabatic processes with finite time non-adiabatic dissipation is considered efficiency under optimization criteria <mml...

A heat engine operating in the one-shot finite-size regime, where systems composed of a small number quantum particles interact with hot and cold baths are restricted to measurements, delivers fluctuating work. Further, engines lesser fluctuation produce amount deterministic Hence, heat-to-work conversion efficiency stays well below Carnot efficiency. Here we overcome this limitation attain all...

Using a recent theoretical approach, we study how global warming impacts the thermodynamics of the climate system by performing experiments with a simplified yet Earth-like climate model. The intensity of the Lorenz energy cycle, the Carnot efficiency, the material entropy production, and the degree of irreversibility of the system change monotonically with the CO2 concentration. Moreover, thes...

We first review the general class of accelerating, rotating and charged Plebanski-Demianski (PD) black holes in presence cosmological constant, which includes Kerr-Newman hole Taub-NUT spacetime. assume that thermodynamical pressure may be described by negative so represents anti-de Sitter (AdS) PD hole. The thermodynamic quantities like surface area, entropy, volume, temperature, Gibb's Helmho...

In this paper, we study thermodynamic features of the charged rotating accelerating black holes in anti-de Sitter spacetime. First, consider these as systems and analyze thermal stability/instability through use heat capacity canonical ensemble. We also investigate effects angular momentum, electric charge string tension on quantities stability system. Considering known relation between pressur...