Modular cascaded heat storage device based on phase change heat storage unit and method thereof

Abstract

The invention discloses a modular cascaded heat storage device based on a phase change heat storage unit and a method thereof. The device comprises a device body, a phase change heat storage unit stacking system and input and output systems. The phase change heat storage unit stacking system is arranged in the device body, and the input and output systems are arranged at the upper and lower ends of the device body. The phase change heat storage unit stacking system comprises a plurality of phase change heat storage units, a supporting rack is arranged in the bottom of each of the phase change heat storage units to form a horizontal flowing channel of a heat exchange work medium, the phase change heat storage units are distributed in a cascaded manner in the device body according to the smelting points of the inner phase change materials, the internal portion of the unit is made from a phase change material, and a solid heat storage material wraps outside the unit. The heat storage flow of the system is as follows: a high-temperature fluid flows from a high temperature phase change heat storage area to a low temperature phase change heat storage area successively and finally flows out from the bottom of the device; on the contrary, a heat releasing flow is performed. The modular cascaded heat storage device disclosed by the invention is strong in heat storage capacity (heat can be stored and utilized in a cascaded manner), easy to stack in unit and amplify systematically and wide in application range.

Description

technical field [0001] The invention belongs to the field of solar energy storage utilization, and in particular relates to a modular cascade heat storage device based on a phase change heat storage unit and a method thereof. Background technique [0002] Solar energy has become the focus of current research in the field of energy applications due to its advantages such as environmental protection, cleanliness, renewable, wide distribution, and easy access. As one of the low-cost energy utilization technologies, solar medium-high temperature heat storage utilization technology is an important means to effectively alleviate the problems of energy shortage, resource depletion, and environmental pollution caused by traditional thermal power generation in the future. The solar energy utilization system mainly includes the heat collection subsystem, the heat absorption and heat transfer subsystem, the energy storage subsystem, the steam generation system and the power generation ...

AI Technical Summary

Problems solved by technology

[0005]In the traditional energy structure dominated by fossil energy, the demand for energy, especially high-grade electric energy, is mainly achieved by supply-side real-time adjustment of output to achieve supply-demand balance, heat storage The application of devices, especially high-temperature heat storage devices, is still seldom

Moreover, there is no device that combines the application of medium and high temperature heat storage systems

At present, there is no relevant technology for cascaded heat storage in medium and high temperature heat storage systems

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