The Impact on Global Warming of the Substitution of Refrigerant Fluids in Vapour Compression Plants: An Experimental Study

Aprea, Ciro; Greco, Adriana; Maiorino, Angelo

doi:10.5772/48349

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…Each of the fluidic reservoirs is connected to a pressure controller (Elveflow OB1, see Note S2, Supporting Information, for technical details) at the inlet (x = 0 m) and at the outlet (x = 1 m). The tube contains capsules composed of n = 18 bistable elements, and the physical parameters of the capsules were measured experimentally, yielding: 2 , with standard deviation of ±0.3217 Pa m 2 (see Note S3, Supporting Information, for details). The capsule's velocity, length, and position were measured using a in-house video analysis code (see Software S2, Supporting Information, as well as measurement error analysis provided in Note S2, Supporting Information) allowing us to analyse the propagation of pressure throughout the metafluid, its effect on the individual capsules, and their interconnected behavior.…”

Section: Experimental Demonstrationmentioning

confidence: 99%

“…The emission associated with these cycles is a primary contributor to global warming, and the use of hazardous fluids, required for efficient cooling cycles, makes refrigeration the world's current most polluting technology. [1][2][3][4] This motivates the development of new fluids with enhanced thermodynamic properties that enable cleaner and more efficient energy cycles.…”

Section: Introductionmentioning

confidence: 99%

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Multistable Metafluid based Energy Harvesting and Storage

et al. 2023

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The thermodynamic properties of fluids play a crucial role in many engineering applications, particularly in the context of energy. Fluids with multistable thermodynamic properties may offer new paths for harvesting and storing energy via transitions between equilibria states. Such artificial multistable fluids can be created using the approach employed in metamaterials, which controls macro‐properties through micro‐structure composition. In this work, the dynamics of such “metafluids” is examined for a configuration of calorically‐perfect compressible gas contained within multistable elastic capsules flowing in a fluid‐filled tube. The velocity‐, pressure‐, and temperature‐fields of multistable compressible metafluids is studied by both analytically and experimentally, focusing on transitions between different equilibria. The dynamics of a single capsule is first examine, which may move or change equilibrium state, due to fluidic forces. The interaction and motion of multiple capsules within a fluid‐filled tube is then studied. It shows that such a system can be used to harvest energy from external temperature variations in either time or space. Thus, fluidic multistability allows specific quanta of energy to be captured and stored indefinitely as well as transported as a fluid, via tubes, at standard atmospheric conditions without the need for thermal isolation.

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Section: Experimental Demonstrationmentioning

confidence: 99%