An international research team led by the University of Maryland has developed a novel elastocaloric cooling material that is highly efficient, eco-friendly and easily scaled-up for commercial use.
The researchers new cooling material is a nickel-titanium alloy that was sculpted using additive technology (3-D printing). Their work is published in the November 29 issue of Science.
Cooling technology, used in refrigeration and HVAC systems around the globe, is a multi-billion dollar business. Vapor compression cooling, which has dominated the market for over 150 years, has plateaued in efficiency, and uses chemical refrigerants with high global-warming potential. Solid-state elastocaloric cooling, in which stress is applied to materials to release and absorb (latent) heat, has been under development for the last decade and is a front-runner for alternative cooling technologies. Shape-memory alloys are found to display a significant elastocaloric cooling effect; however, hysteresis – work lost in each cycle, which causes fatigue and eventual failure of such materials – remains a challenge.
The international team of collaborators led by UMD Materials Science and Engineering (MSE) Professor, Ichiro Takeuchi, has developed an improved elastocaloric cooling material using a blend of nickel (Ni)-titanium (Ti) metals, forged using a 3D printer, that is not only potentially more efficient than current technology, but is completely ‘green.’ Moreover, it can be quickly scaled up for use in larger devices.
“In this field of alternative cooling technologies, it’s very important to work on both the materials end, as well as the systems end – we are fortunate to have a highly-qualified team of experts at the University of Maryland, College Park to work on both ends,” said Professor Takeuchi. “It’s only when these two efforts closely align that you make rapid progress, which our team was able to do.”
Comparatively speaking, there are three classes of caloric cooling technology – magnetocaloric, electrocaloric and elastocaloric – all of which are ‘green’ and vapor-less. Magnetocaloric, the oldest of the three, has been under development for 40 years and is just now on the verge of being commercialized.
“The need for additive technology, otherwise known as 3D printing, in this field is particularly acute because these materials also act as heat exchangers, delivering cooling to a medium such as water,” said Takeuchi.
Takeuchi has been developing this technology for almost a decade – he received the UMD Outstanding Invention of the Year for this research in 2010, and the DOE ranked elastocaloric cooling, also known as thermoelastic cooling, #1 as the ‘most promising’ of alternative cooling technology in 2014 – and it is one step closer to commercialization.
“The key to this innovation that is fundamental, but not often discussed, is that materials fatigue – they wear out,” said Takeuchi. “This is a problem when people expect their refrigerators to last for a decade, or longer. So, we addressed the problem in our study.”
The team tested their creation heavily over a four-month period and still maintained its integrity. “Some known elastocaloric materials start showing degradation in cooling behavior after just hundreds of cycles. To our surprise, the new material we synthesized showed no change after one million cycles,” said, UMD’s Huilong Hou, who is the first author of the work and a post-doctoral researcher in the Department of Materials Science and Engineering.
The metal additive manufacturing uses a laser to melt, and then mix, metals in powder form. By controlling the powder feed, the team was able to produce nanocomposites which gave rise to the robust mechanical integrity in the material.
The research team also included scientists at the U.S. Department of Energy Ames Laboratory in Ames, Iowa, where the 3D printing was carried out, and researchers from the Colorado School of Mines in Golden, Colorado, who helped investigate the internal structure of the printed materials.
Go deeper with Google Headlines on:
Cooling technology
[google_news title=”” keyword=”cooling technology” num_posts=”5″ blurb_length=”0″ show_thumb=”left”]
Go deeper with Bing News on:
Cooling technology
- Global Ductless Heating & Cooling Systems Market Projected to Drive Past USD 228 Billion Revenue Share by 2032, Driving 8% CAGR Growth
The global ductless heating & cooling systems market has experienced remarkable growth, surging to an estimated worth of USD 98 billion in 2021, with a promising outlook for the future. Driven by a ...
- Cabinet Technology is Bridging the Efficiency of Air Cooling with the Performance of Liquid Cooling for HPC and AI Workloads
SPONSORED GUEST ARTICLE] Data center operators need to modernize and future-proof their facilities, so they don't get left behind as AI and HPC deployments expand. While the industry is exploring ...
- Midea India Pioneers the Cooling Solutions ProShop Concept in Gurugram
This initiative is a testament to our commitment to providing exceptional customer experiences, offering expert advice, seamless installations, and comprehensive after-sales support. Through ...
- Modified pulse tube refrigerator cuts cryogenic cooling times in half
Ryan Snodgrass and colleagues in the US have designed a new way to operate pulse tube refrigerators (PTRs), which compress and expand helium gas in cooling cycle that is similar to that used in a ...
- 'Better than my Beautyrest': This cooling memory foam pillow is just $20 at Wayfair's Way Day sale — that's 80% off
A restful, comfortable night's sleep is worth its weight in gold — but we think $20 is a pretty good deal instead! Originally $100 for the standard size, this supportive snuggler is now 80% off for ...
Go deeper with Google Headlines on:
Thermoelastic cooling
[google_news title=”” keyword=”thermoelastic cooling” num_posts=”5″ blurb_length=”0″ show_thumb=”left”]
Go deeper with Bing News on:
Thermoelastic cooling
- Best CPU Cooler 2024
If you’re looking for powerful cooling, the Noctua NH-D15S delivers and is ready to keep the beefiest Intel and Ryzen processors frosty. This cooler features two massive sets of aluminum ...
- Best Cooling Mattress Toppers of 2024
When you sleep at night, getting too hot can destroy the quality of rest you get. Thankfully, there are cooling options at just about every level of sleep products, including cooling blankets ...
- What to Do if Your Air Conditioner Is Not Cooling Your Space
The appliance circulates air, but nothing refreshingly chill. My air conditioner is not cooling at all. How do I fix it? A: It’s the last thing you want on a sweltering summer’s day ...
- The 12 Best Cooling Pillows of 2024
Hot sleepers, don't worry, there are solutions. In addition to cooling sheets to put on your bed, you can also get cooling pillows. Updating to a cooling pillow will give you a much different ...
- What’s a cooling-off period and how do I use it to cancel an order?
What is a cooling-off period? If you're buying goods or services from a company online, over the phone or via mail order, you should be given a 'cooling-off period'. This is the period of time you ...