Heat accumulating power station and heat supplying and power generating method thereof

Abstract

The invention relates to a heat accumulating power station and a heat supplying and power generating method thereof. The heat accumulating power station comprises a power supply, an electric heater, a heat supplying device, a power generating device, a phase change heat storage device and a fused salt heat storage device, wherein the phase change heat storage device is connected to the heat supplying device, the power generating device and the fused salt heat storage device, respectively, and a phase change material is heated by the electric heater so as to convert electric energy into heat energy which is stored in the phase change material; the fused salt heat storage device connected to the heat supplying device, the power generating device and the phase change heat storage device comprises a hot salt tank which stores high-temperature fused salt and a cold salt tank which stores low-temperature fused salt; the hot salt tank is heated through the electric heater by the power supply to convert electric energy into heat energy which is stored in the high-temperature fused salt in the hot salt tank; the power generating or heat supplying duration of the heat accumulating power station is prolonged by matched power generation or heat supply of the phase change heat storage device and the fused salt heat storage device, and meanwhile, by virtue of different heat charging and discharging characteristics of the fused salt and the heat storage device, an implementing means for flexibly supplying heat and power is provided according to different users and price structures.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a heat storage power station and a heat supply and power generation method thereof. Background technique [0002] With the development of society and the improvement of people's living standards, the structure of power consumption in China has undergone drastic changes. The peak power is seriously insufficient, the peak-to-valley difference continues to increase, and the low-efficiency operation of generator sets during the valley period. In order to solve this contradiction, in the power The industry has put forward the measures of "shaving peaks and filling valleys", implementing peak and valley electricity prices, encouraging electricity consumption during valley periods, and adopting electric heating molten salt system to realize central heating, which can convert excess electricity into heat energy and store it in high-temperature melting furnaces when electricity con...

AI Technical Summary

Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the existing independent molten salt thermal storage power station, which generally only uses valley electricity to heat the molten salt through an electric heater to become high-temperature molten salt and store it in a high-temperature molten salt tank for heating or power generation , it cannot be guaranteed that after the power supply is cut off during the peak period of electricity consumption, with the use of high-temperature molten salt, the temperature of high-temperature molten salt will drop, resulting in the defect of poor continuity of power generation or heating in thermal storage power stations

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