Long-life elastocaloric regenerative cooler/heat pump with a breakthrough performance [Elektronski vir]
DallʹOlio, Stefano ...
In recent years, elastocaloric cooling has been shown to be one of the most promising future alternatives to vapor compression cooling and heating systems. Many elastocaloric materials (eCM) have ...large latent heat and large adiabatic temperature changes associated with a martensitic phase transformation. Our group recently built a new active elastocaloric regenerator, resembling a shell-and-tube heat exchanger type made of Ni-Ti tubes loaded in compression. The regenerator showed durable operation and record performance with a maximum temperature span of more than 31 K and maximum heating/cooling power of more than 60 W, equivalent to 4,400 W per kg of the elastocaloric material using only 13.7 g of eCM. It can operate in both cooling and heat-pumping modes. Here, we will present the research behind the development of our elastocaloric regenerator that ranges from material science, thermodynamics, heat transfer, mechanics and design engineering.
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