The present invention relates to a thermal device comprising at least one heat exchanger and at least one heat source and/or heat sink. The thermal device in the invention is designed as a combination of the first thermal device based on a vapor-compression principle contained the first heat transfer medium, and the second thermal device based on elastocaloric principle contained the second heat transfer medium. At least one deformable heat exchanger made of elastocaloric material is common to both thermal devices.
F.35 Other
COBISS.SI-ID: 15315739Speaker on our TEDx stage will be Jaka Tušek, postdoctoral researcher and assistant at the Laboratory for cooling and district energy at the Faculty of Mechanical Engineering in Ljubljana. He works on the development of alternative cooling technologies based on the caloric effects in ferrroic materials. In 2010, he finished his PhD in the field of magnetocaloric cooling. Later he worked as a postdoctoral researcher at the Technical University of Denmark. With a team they built and experimentally evaluated the world's first conceptual prototype of a regenerative elastocaloric device. The results were published in the prestigious journal Nature Energy. He is the author of numerous scientific articles in international journals and three patent applications in the field of alternative cooling technologies. On our TEDx stage he will be talking about global problems and challenges on the exponential growth of cooling demands and about the ideas for solutions to these challenges.
B.04 Guest lecture
COBISS.SI-ID: 15316763The name of the is Jaka Tušek, researcher in the Laboratory for refrigeration and district energy and the Faculty of mechanical engineering, where they developed the first efficient conceptual prototype of regenerative elastocaloric heat pump in the world, which could lead to a revolution in refrigeration systems. The results were published in reputable journal Nature Energy.
E.01 National awards
COBISS.SI-ID: 14935323A recently reported prototype utilizing an elastocaloric regenerator with thin Ni-Ti plates loaded in tension demonstrated high temperature span, high heating and cooling power, and potentially high efficiency, but also limited durability with a fatigue life only up to 6,000 cycles. In this work we report a comprehensive analysis of the elastocaloric effect at different mean strains and different strain amplitudes on commercial Ni-Ti plates loaded in tension. Advantages of applying pre-strain conditions for elastocaloric cooling are demonstrated and fatigue life at different strain amplitudes is evaluated. It was shown that properly polished samples can withstand above 100,000 cycles at a strain amplitude up to 0.5 % without failure, which corresponds to an adiabatic temperature change of 5 K. We further analysed different methods for improving fatigue life also at higher strain amplitudes.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 15715355