High-performance multimode elastocaloric cooling system

Science, Journal Year: 2023, Volume and Issue: 380(6646), P. 722 - 727

Published: May 18, 2023

Developing zero-global warming potential refrigerants has emerged as one area that helps address global climate change concerns. Various high-efficiency caloric cooling techniques meet this goal, but scaling them up to technologically meaningful performance remains challenging. We have developed an elastocaloric system with a maximum power of 260 watts and temperature span 22.5 kelvin. These values are among the highest reported for any system. Its key feature is compression fatigue-resistant nitinol (NiTi) tubes configured in versatile multimode heat exchange architecture, which allows harnessing both high delivered large spans. Our shows cooling, only 8 years ago, promising direction commercializing cooling.

Language: Английский

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Fluoropolymer ferroelectrics: Multifunctional platform for polar-structured energy conversion

Science, Journal Year: 2023, Volume and Issue: 380(6645)

Published: May 11, 2023

Ferroelectric materials are currently some of the most widely applied material systems and constantly generating improved functions with higher efficiencies. Advancements in poly(vinylidene fluoride) (PVDF)-based polymer ferroelectrics provide flexural, coupling-efficient, multifunctional platforms for applications that demand portable, lightweight, wearable, durable features. We highlight recent advances fluoropolymer ferroelectrics, their energetic cross-coupling effects, emerging technologies, including highly efficient electromechanical actuators sensors, electrocaloric refrigeration, dielectric devices. These developments reveal molecular nanostructure manipulations polarization-field interactions, through facile defect biasing, could introduce enhancements physical effects would enable realization multisensory wearables immersive virtual world smart a sustainable future.

Language: Английский

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Solid-state cooling: thermoelectrics

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 15(11), P. 4527 - 4541

Published: Jan. 1, 2022

This review systematically elucidates the thermoelectric cooling technology, and proposes a strategy for boosting power factor by improving carrier mobility through utilizing material-planification concept.

Language: Английский

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High-performance cooling and heat pumping based on fatigue-resistant elastocaloric effect in compression

Joule, Journal Year: 2022, Volume and Issue: 6(10), P. 2338 - 2357

Published: Sept. 20, 2022

In recent years, elastocaloric cooling has shown great potential as an alternative to vapor-compression refrigeration. However, there is still no existing device that offers fatigue-resistant operation and yet high cooling/heat-pumping performance. Here, we introduce a new design of regenerator based on compression-loaded Ni-Ti tubes, referred shell-and-tube-like regenerator. Our design, which can operate in both heat-pumping modes, enables durable record performance with maximum temperature span 31.3 K mode or heating/cooling powers more than 60 W, equivalent 4,400 W/kg the material (at 10 K). terms metrics, these results surpass all previously developed caloric (magnetocaloric, electrocaloric, elastocaloric) devices demonstrate enormous regenerators be used for wide range applications.

Language: Английский

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High cooling performance in a double-loop electrocaloric heat pump

Science, Journal Year: 2023, Volume and Issue: 382(6672), P. 801 - 805

Published: Nov. 16, 2023

Cooling through solid-state electrocaloric materials is an attractive replacement for vapor compression. Despite recent efforts, devices that are potentially commercially competitive have not been developed. We present cooler with a maximum temperature span of 20.9 kelvin and cooling power 4.2 watts under the moderate applied electric field 10 volts per micrometer without any observed breakdown. Moreover, coefficient performance, even taking into account energy expended on fluid pumping, reaches 64% Carnot's efficiency as long properly recovered. believe this demonstration shows to be very promising alternative compression cooling.

Language: Английский

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Perspectives and Energy Applications of Magnetocaloric, Pyromagnetic, Electrocaloric, and Pyroelectric Materials

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 30, 2024

Abstract This perspective provides an overview of the state research and innovation in areas magnetocaloric pyromagnetic materials, electrocaloric pyroelectric including overlapping sub‐areas multicaloric multipyro materials that can operate simultaneously under application magnetic electric fields. These are critically examined for their potential to revolutionize cooling, heating, energy‐harvesting applications. first summarizes state‐of‐the‐art advancements highlights recent significant developments. Then, it is identified discussed prevailing challenges hindering widespread adoption technologies based on these materials. In this context, after consulting with members caloric pyro communities, a technology roadmap outlined guide efforts overcoming current barriers applications, goal achieving impactful results by 2040. emphasizes importance focusing under‐researched novel devices, spaces, paving way interdisciplinary lead reductions carbon dioxide emissions.

Language: Английский

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Advanced Magnetocaloric Materials for Energy Conversion: Recent Progress, Opportunities, and Perspective

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(21)

Published: March 29, 2024

Abstract Solid‐state caloric effects as intrinsic thermal responses to different physical external stimuli (magnetic‐, uniaxial stress‐, pressure‐, and electric‐fields) can achieve a higher energy efficiency compared with traditional gas compression techniques. Among these effects, magnetocaloric conversion is regarded the best available alternative has been exploited extensively for promising application scenarios in last decades. This review systematically introduces effect its applications, summarizes corresponding representative materials, well important progress recent years. Specifically, focuses on some key understandings of by utilizing state‐of‐the‐art technical tools such synchrotron X ‐ray, neutron scattering, muon spin spectroscopy, positron annihilation high magnetic fields, etc., highlights their importance toward advanced materials design development. An overview basic principles applications techniques provided. Finally, challenges perspectives further developments this field are discussed. Further in‐depth understanding manufacturing technology advancement combined fast‐developed artificial intelligence machine learning expected advance closer real applications.

Language: Английский

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Self-oscillating polymeric refrigerator with high energy efficiency

Nature, Journal Year: 2024, Volume and Issue: 629(8014), P. 1041 - 1046

Published: May 8, 2024

Language: Английский

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Magnetic properties and magnetocaloric effect in Tb2CoCrO6 oxide

Journal of Magnetism and Magnetic Materials, Journal Year: 2025, Volume and Issue: unknown, P. 172897 - 172897

Published: Feb. 1, 2025

Language: Английский

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Roller-cam-driven compressive elastocaloric device with high cooling power density

Device, Journal Year: 2025, Volume and Issue: unknown, P. 100677 - 100677

Published: Jan. 1, 2025

Language: Английский

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