FIELD: engines and pumps.
SUBSTANCE: working medium with the use of the magnetocaloric effect in solid-state heat pumps contains a coolant made of a material with a giant magnetocaloric effect, and at least one piezoelectric transducer for applying external mechanical stresses. The refrigerant is made in the form of a heat exchanger consisting of a set of plane-parallel plates or rods. The piezoelectric transducer is made in the form of at least one actuator, the refrigerant and the piezoelectric actuator are clamped in a steel frame.
EFFECT: ability to customize the Curie temperature of magnetocaloric material, the completion of the phase transition observed at a given temperature and decrease or disappearance of temperature and field hysteresis of the material with the first native of the phase transition.
2 dwg
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