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 cooling system with a maximum cooling power of 260 watts and a maximum temperature span of 22.5 kelvin. These values are among the highest reported for any caloric cooling system. Its key feature is the compression of fatigue-resistant elastocaloric nitinol (NiTi) tubes configured in a versatile multimode heat exchange architecture, which allows the harnessing of both high delivered cooling power and large temperature spans. Our system shows that elastocaloric cooling, which only emerged 8 years ago, is a promising direction for commercializing caloric cooling.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1126/science.adg7043 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Mechanocaloric Effects Characterization of Low-Crystalline Thermoplastic Polyurethanes Fiber.
Polymers (Basel)
November 2024
School of Microelectronics, Southern University of Science and Technology, Shenzhen 518055, China.
Mechanocaloric cooling/heat pumping with zero carbon emission and high efficiency shows great potential for replacing traditional refrigeration with vapor compression. Mechanocaloric prototypes that are developed using shape memory alloys (SMAs) face the problems of a large driving force and high cost. In this work, we report a low-crystalline thermoplastic polyetherurethane (TPU) elastomer fiber with a low actuation force and good mechanocaloric performance.
View Article and Find Full Text PDFEnhancement of the Elastocaloric Performance of Natural Rubber by Forced Air Convection.
Polymers (Basel)
October 2024
Departament de Física de la Matèria Condensada (FMC), Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Catalonia, Spain.
We study the enhancement of the elastocaloric effect in natural rubber by using forced air convection to favour heat extraction during the elongation stage of a stretching-unstretching cycle. Elastocaloric performance is quantified by means of the adiabatic undercooling that occurs after fast removal of the stress, measured by infrared thermography. To ensure accuracy, spatial averaging on thermal maps of the sample surface is performed since undercooled samples display heterogeneities caused by various factors.
View Article and Find Full Text PDFGiant Elastocaloric Effect and Improved Cyclic Stability in a Directionally Solidified (NiMnTi)B Alloy.
Materials (Basel)
September 2024
Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
Superelastic shape memory alloys with an integration of large elastocaloric response and good cyclability are crucially demanded for the advancement of solid-state elastocaloric cooling technology. In this study, we demonstrate a giant elastocaloric effect with improved cyclic stability in a <001> textured polycrystalline (NiMnTi)B alloy developed through directional solidification. It is shown that large adiabatic temperature variation (|Δ|) values more than 15 K are obtained across the temperature range from 283 K to 373 K.
View Article and Find Full Text PDFElastocaloric Heat Pump by Twist Induced Periodical Non-Linear Stress for Low Hysteresis and High Carnot Efficiency.
Adv Mater
November 2024
State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China.
Article Synopsis
- - Elastocaloric cooling is a solid-state technology aimed at enhancing cooling efficiency while reducing energy consumption, addressing global warming and energy shortages.
- - A new heat pump design using fiber twisting and periodic non-linear stress improves cooling performance, achieving a high coefficient of performance (COP of 30.8) and low hysteresis work.
- - This innovative design significantly extends the device's cycle life to 14,752 cycles and delivers effective cooling with a temperature span of 25.6 K and a specific cooling power of 1850 W/kg.
Tensile and Elastocaloric Properties of Natural/Devulcanized Waste Rubber Blends.
Macromol Rapid Commun
November 2024
Departament de Ciència i Enginyeria de Materials (CEM), Escola d'Enginyeria Barcelona-Est (EEBE), Universitat Politècnica de Catalunya BarcelonaTech (UPC), Av. Eduard Maristany 16, Barcelona, 08019, Spain.
The need for eco-friendly cooling materials and material recycling are two urgent challenges to address. In this paper, the role of the ground tyre rubber treatment (cryo-grinding and devulcanization) is investigated on the tensile and elastocaloric properties of Natural rubber (NR)/ ground tyre rubber (GTR). The GTR particles that are sieved (<63µm) and devulcanized by microwave irradiation (1 min at 800Watts) exhibit a low network chain density (0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!