Thermal Energy Harvester Based on Magnetic Phase Change Alloy-Pyroelectric Material

Abstract

The invention belongs to the field of hot energy collection, and particularly relates to a magnetic-phase change alloy-pyroelectric material-based hot energy collector. The magnetic-phase change alloy-pyroelectric material-based hot energy collector comprises a fixed table, a pyroelectric piece, a magnetic-phase change alloy piece, a permanent magnet, a suspension arm and a heating table, whereinthe fixed table is arranged below one end of the suspension arm, one end of the suspension arm is fixedly arranged on the fixed table, the pyroelectric piece is pasted onto a lower surface of the other end of the suspension arm, the magnetic-phase change alloy piece is pasted to a part below the pyroelectric piece, the heating table is placed below the magnetic-phase change alloy piece, and the permanent magnet is suspended above the pyroelectric piece. The temperature of the pyroelectric material can be instantaneously and substantially changed, and reciprocating motion is achieved by the suspension arm and antiferromagnetic-ferromagnetic phase changing alloy pasted at the tail end of the suspension arm; and meanwhile, the pyroelectric material is pasted onto the alloy piece, the temperature of the pyroelectric material is rapidly changed by the favorable heat conductivity of the alloy, so that conversion from hot energy and electric energy is achieved.

Description

technical field [0001] The invention belongs to the field of heat energy collection, in particular to a heat energy collector based on a magnetic phase change alloy-pyroelectric material. Background technique [0002] Thermal energy collectors can replace some traditional batteries to continuously power sensors, and have high application value in waste heat, natural heat collection and other fields. At present, the commonly used thermal energy collectors use the thermoelectricity, pyroelectricity, thermoelasticity and thermomagnetism of the material, and these types of thermal energy collectors have a series of problems such as complex process, high cost, and limited application conditions. To overcome these problems, linking magnetic materials and thermal energy harvesters has begun to attract people's attention. [0003] At present, the existing technology of using magnetic materials to make thermal energy collectors is constantly improving. In 2011, R.D.James et al. heat...

AI Technical Summary

Problems solved by technology

However, the energy collection efficiency of small devices is limited by the moving speed of the cutting magnetic induction line, the number of coil turns, and the size of the magnetic flux, and the conversion efficiency is low.

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