Fuse salt phase-change heat storage electric boiler

Abstract

The invention discloses a fuse salt phase-change heat storage electric boiler. The fuse salt phase-change heat storage electric boiler comprises a boiler tank body, the interior of the boiler tank body is portioned into a heat transferring cavity and a heat storage cavity through a partition plate, and a heat storage medium is arranged in the heat storage cavity. A heat transferring medium is arranged in the heat transferring cavity, an immersed-type electric heater is arranged in the heat storage cavity, and the heat storage cavity is connected with a heat storage medium inlet and a heat storage medium outlet. The heat transferring cavity is connected with a heat transferring medium inlet and a heat transferring medium outlet, and a set of heat tubes penetrating through the partition plate are arranged in the boiler tank body. According to the fuse salt phase-change heat storage electric boiler, a heat tube exchanger is adopted, compared with an ordinary exchanger, the heat transferring performance is better, storage heat can be rapidly extracted, and efficient heat transferring is achieved; through the diode characteristic of the heat tubes, heat one-way transferring is ensured,and heat back flowing is prevented; and through the heat switch characteristic of the heat tubes, the work temperature range of the heat storage medium is controlled, it is ensured that solid-liquid phase-change circulation occurs near fused points, and the phase-change energy storage characteristic of fuse salt is maintained.

Description

Technical field: [0001] The invention relates to a molten salt phase change heat storage electric boiler, which belongs to the technical field of heat storage and heat storage. Background technique: [0002] In order to actively promote the prevention and control of air pollution, my country's clean and renewable energy power generation has grown rapidly, and the installed capacity of wind power and photovoltaic power generation has been greatly improved. However, wind power and photovoltaic power generation have intermittent, random, low dispatchability and obvious gaps. Problems such as the reverse peak-shaving characteristics make the grid-connection, peak-shaving and consumption of new energy become the bottleneck of its development, resulting in low utilization efficiency of wind power and photovoltaics, and the phenomenon of "abandoning wind and solar" is prominent. [0003] Heat storage technology utilizes unstable wind power, photovoltaics, and night-time trough elect...

AI Technical Summary

Problems solved by technology

The existing water thermal storage electric boiler has the following problems: The heat storage temperature is low (only 90°C), thus limiting the range of heat utilization, it can only be used for low-temperature heat exchange and heating, and cannot be used for power generation; The pressure of the equipment is high, high-pressure pressure-bearing equipment is required, and the safety performance requirements are high; It belongs to sensible heat storage, with small heat storage capacity and large equipment footprint

The existing molten salt heat storage equipment only uses the sensible heat of molten salt to store heat, and the heat storage is small. The heat exchanger is mostly of plate or shell and tube type, and its thermal conductivity is relatively poor. It does not have the functions of thermal diodes and thermal switches. heat exothermic heat release unstable

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