Novel submerged fixed-focus disk type solar heat and power combined supply system

Abstract

The invention relates to the technical field of solar photo-thermal energy utilization accessory devices, in particular to a novel submerged fixed-focus disk type solar heat and power combined supplysystem which is simple in structure, small in occupied area and low in cost. The novel submerged fixed-focus disk type solar heat and power combined supply system comprises a reflecting system, a driving system, a thermotechnical system, an electrical system and a control system. The reflecting system comprises a mirror frame, a reflecting mirror and a mirror bracket. The driving system further comprises a hydraulic driving assembly, a pitching wheel set, a horizontal wheel set, horizontal rails and a pitching rail. The thermotechnical system comprises a support and a heat absorber. The electrical system further comprises a power supply and distribution device and an electrical control device. The control system further comprises a sensor and a control computer.

Description

technical field [0001] The invention relates to the technical field of solar photothermal energy utilization accessory devices, in particular to a novel sunken fixed-focus disc solar heat and power cogeneration system. Background technique [0002] Dish-type solar thermal technology is one of the technologies in the field of solar thermal energy utilization. Together with trough solar thermal technology, tower solar thermal technology, and Fresnel solar thermal technology, it is called the four major technical routes of solar thermal energy. Its principle It mainly collects the energy of sunlight, converts it into thermal energy or electric energy, and transmits it to the user end to realize energy collection and utilization; among the four major technical routes, trough technology, tower technology and Fresnel technology are all Commercial application cases have been realized, but the dish technology is still in the experimental stage; the traditional dish solar system is g...

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Problems solved by technology

[0002] Dish-type solar thermal technology is one of the technologies in the field of solar thermal energy utilization. Together with trough solar thermal technology, tower solar thermal technology, and Fresnel solar thermal technology, it is called the four major technical routes of solar thermal energy. Its principle It mainly collects the energy of sunlight, converts it into thermal energy or electric energy, and transmits it to the user end to realize energy collection and utilization; among the four major technical routes, trough technology, tower technology and Fresnel technology are all Commercial application cases have been realized, but the dish technology is still in the experimental stage; the traditional dish solar system is generally a dish Stirling system, and the system uses a number of reflectors, which are combined into a parabolic or spherical reflector array. Reflect and focus the parallel sunlight to the surface of the thermal head of the Stirling generator located at the focal point of the reflective surface. Through energy exchange, the reflector transfers the solar energy to the thermal head of the Stirling generator to heat the circulating working fluid inside it. The method of heat expansion and work pushes the piston rod to reciprocate and drives the generator at the rear end to generate electricity. This type of dish solar system is a direct power generation system, which cannot be equipped with an energy storage system, and due to changes in solar radiation (such as cloudy , rainy, etc.), the energy focused by the mirror often fluctuates, and it is difficult for the Stirling generator to operate continuously and stably. Due to the limitations of the above problems, the system has not been able to carry out large-scale market applications.

[0003] Aiming at the needs of the market and the defects of dish technology, Juguang Solar Technology (Beijing) Co., Ltd. has disclosed a "single-tower multi-dish solar power generation system" with patent number ZL201010279188. Split operation solar dish concentrating power generation system", this system retains the unique point focus form of the dish system and the characteristics of two-axis day-to-day tracking, separates the reflection system from the heat absorber, and the heat absorber is placed in the center of the system At the top of the heat collection tower, the synchronous tracking of the control system ensures the synchronization of the movement of the heat absorber and the reflector. The heat storage system and heat exchange system are placed in the heat collection tower, which solves the technical problem that the dish system cannot store heat. And the process route of directly converting the dish system from solar energy to electric energy has been changed to the process route of converting solar energy into heat energy and then into electric energy. Higher wind resistance performance to ensure the quality of the reflective focusing spot of the mirror, so the wind resistance requirements for the main structure are higher, which makes the overall steel consumption of the system larger, the system cost is too high, and it does not have the economy of market promotion , and the shielding area is also larger when the system is running, which makes the system occupy a larger area, which also leads to certain economic problems

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