Tower bottom reflecting type solar focusing heat-collecting device

Abstract

Disclosed is a tower bottom reflecting type solar focusing heat-collecting device. The device consists of heliostats, a rotary paraboloidal mirror, tapered mirrors, a cylindrical mirror, a compound paraboloidal mirror, a sunlight receiver and a heat storage heat exchanger, wherein the rotary paraboloidal mirror, the tapered mirror, the cylindrical mirror, the tapered mirror, the compound paraboloidal mirror, the sunlight receiver and the heat storage heat exchanger are arranged sequentially from tower top to tower bottom, a plurality of heliostats are used for focusing and reflecting sunlight to the tower top, the rotary paraboloidal mirror, the tapered mirrors, the cylindrical mirror and the compound paraboloidal mirror are used for re-reflecting the sunlight to the sunlight receiver at the tower bottom from the tower top, the sunlight receiver is located in the heat storage heat exchanger, the heat storage and external heat exchanging are achieved on the heat storage heat exchanger, the focusing heat collection, heat storage and external heat exchanging are conducted at the bottom of the tower, the tower bottom load is reduced, the power consumption is reduced, the heat loss is reduced, the process is simplified, the high-temperature heat storage is facilitated, and the device is suitable to solar generating and high-temperature heating application occasions.

Description

technical field [0001] The invention belongs to the technical field of solar energy utilization, and in particular relates to a reflection tower bottom type solar energy focusing and heat collecting device. Background technique [0002] With the intensification of the energy crisis, solar energy is a non-polluting renewable energy, so the development and utilization of solar energy has gradually attracted people's attention; focusing sunlight to generate high temperature, and using the high temperature generated by focusing sunlight It has very broad application prospects, such as solar thermal power generation, solar thermal treatment, and solar heating. Therefore, it is of great significance to study new solar heat collectors to improve the level of solar energy utilization. [0003] In the existing solar energy concentrating heat collection device, it is difficult to simultaneously take into account the three aspects of concentrated heat collection, high temperature heat ...

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Problems solved by technology

[0003] In the existing solar energy concentrating heat collection device, it is difficult to simultaneously take into account the three aspects of concentrated heat collection, high temperature heat storage and external heat exchange; the sunlight receiver in the existing tower solar heat collection device must be placed on the top of the tower , while the heat storage and heat utilization devices are placed at the bottom of the tower, so that heat collection is carried out at the top of the tower, heat storage and heat utilization are carried out at the bottom of the tower, and the heated medium needs to be pumped to the top of the tower to absorb heat, so the tower body Large load, high power consumption, high temperature heat storage is difficult

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