A large-capacity well-type solar heat collection-heat storage device

Abstract

The invention relates to the field of solar heat collection and storage technologies and discloses a high-temperature large-capacity well type solar heat collection-storage device. A primary reflector of the large-capacity well type solar heat collection-storage device is a concave mirror reflector, and a plurality of the primary reflectors are fixed on the ground to form a reflector array; a secondary reflector is mounted in the air and is a convex mirror reflector which is opposite to the primary reflectors, a conical solar well is arranged below the secondary reflector, and a heat absorbing body is arranged at the bottom of the solar well; a heat storage tank body is a hollow tank body, the middle of the heat storage tank body is the solar well, a part of the heat storage tank body is buried underground and is filled with a heat storage medium; a hot air pipe and a cold air pipe penetrate through the heat storage tank body, are immersed into the heat storage medium and are communicated with the air above the solar well and the heat storage tank body; pipe mouths, which are located on the sidewall of the solar well, of the hot air pipe and the cold air pipe are respectively located above and below the heat absorbing body. The large-capacity well type solar heat collection-storage device integrates advantages of point focus heat collection and fuse salt heat storage, does not need a specific heat transfer system, and has the advantages of simple structure, low maintenance cost, large heat storage capacity, small floor space and more artistic form.

Description

technical field [0001] The invention relates to the technical field of solar heat collection and heat storage, in particular to a high-temperature and large-capacity well-type solar heat collection-heat storage device. Background technique [0002] As a renewable energy with large reserves, clean and pollution-free, solar energy has a broad space for development. Photothermal utilization technology is one of the forms of solar energy utilization, such as solar water heating system, solar heating system, solar steam generator, solar thermal power generation and other technologies. However, solar energy has the characteristics of dispersion and intermittency: the direct radiation energy flux density projected on the unit ground area is low; moreover, the direct radiation is interrupted during the cloud cover period and after sunset, which limits the popularization and application of related technologies. [0003] At present, many researchers have provided a variety of heat co...

AI Technical Summary

Problems solved by technology

This heat transfer and heat storage mode has the following problems: (1) pumps, related pipelines, heat transfer oil or molten salt are required to transport heat transfer medium, which increases the initial investment cost of equipment; (2) the operation of heat transfer system requires Consuming extra energy, the solar energy focus point of the tower structure is located in the mid-air near up to 100m, and the equipment and heat transfer medium need to be regularly maintained or replaced, which undoubtedly increases the operation and maintenance cost; (3) For high-temperature heat collection and storage systems At present, molten salt is mainly used as the heat transfer medium. The most serious problem is that when the temperature is low at night, the molten salt solidifies and freezes in the heat transfer pipe.

But it cannot fundamentally solve the problem; at the same time, it will undoubtedly increase the operating cost

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