Low-temperature phase-change energy-storage electric heater

Abstract

The invention relates to a low-temperature phase-change energy-storage electric heater which comprises a phase-change material container, a heating plate, a heat preservation and insulation layer, anouter frame and a temperature controller. A phase-change material is filled in the phase-change material container; a melting point range of the phase-change material is 50 to 70 DEG C; the latent heat of fusion is larger than 200kJ / kg; the heating plate is located on the outer side of the phase-change material container and is externally connected with a power supply so as to be used for heatingthe phase-change material; the heat preservation and insulation layer is located on the outer side of the heating plate and is used for preserving heat and providing safety protection; the outer frameis located on the peripheries of the heat preservation and insulation layer, the heating plate and the phase-change material container and plays a role in supporting; and the temperature controller is located on the outer frame and is used for connecting the power supply and the heating plate so as to control the heating of the heating plate. According to the low-temperature phase-change energy-storage electric heater provided by the invention, an effect on storing energy at low temperature is achieved by utilizing phase change, and the energy storage temperature range is 50 to 70 DEG C, so that the potential safety hazard is low. The energy storage density is large, and energy is stored by utilizing the phase change and specific heat, so that more energy can be stored under the same volume and weight according to the low-temperature phase-change energy-storage electric heater provided by the invention compared with an existing electric heater for storing energy by simply specific heat.

Description

technical field [0001] The invention relates to the field of low-temperature phase change energy storage, in particular to a low-temperature phase change energy storage electric heater. Background technique [0002] In order to save energy and reduce emissions and change coal to electricity, energy storage electric heaters have begun to appear on the market. The basic principle of the energy storage electric heater is to use the difference in peak and valley electricity prices, heat the energy storage during the valley electricity price, and release heat energy during the peak electricity price, so as to achieve the purpose of energy saving. At present, the existing energy storage electric heaters on the market all use resistance wire heating as the heat source, and aluminum-magnesium refractory bricks as the energy storage material. These energy storage electric heaters have a high energy storage temperature, usually up to 600-800°C. These energy storage materials mainly ...

AI Technical Summary

Problems solved by technology

Organic phase change materials, such as paraffin wax, have a high phase transition enthalpy and a suitable phase transition temperature. According to its molecular weight, it can be 50-70 °C, and it is safe and non-toxic, so it can be used as an ideal heat storage material, but paraffin wax has low thermal conductivity.

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