Linear Fresnel reflective solar thermal collector combined with conservatory

Abstract

The invention discloses a linear Fresnel reflection type solar heat collecting device combined with a sun room. The linear Fresnel reflection type solar heat collecting device combined with the sun room comprises the double-slope-top sun room, a linear Fresnel reflection device, a secondary reflection device, a straight-through type vacuum heat collecting pipe and a fixing hanging bracket; the linear Fresnel reflection device, the secondary reflection device, the straight-through type vacuum heat collecting pipe and the fixing hanging bracket are located in the double-slope-top sun room; the roofs of the double-slope-top sun room are correspondingly inclined towards the south and the north; the secondary reflection device and the straight-through type vacuum heat collecting pipe are fixed to the double-slope-top sun room through the fixing hanging bracket; the secondary reflection device is located above the straight-through type vacuum heat collecting pipe; and the linear Fresnel reflection device is located on the ground of the double-slope-top sun room. The solar heat collecting device is long in service life and low in maintaining cost; and the solar utilizing rate is high, cost is low, the structure is simple, the appearance is attractive, and the popularization potential is high.

Description

technical field [0001] The invention relates to a solar heat collecting device, in particular to a linear Fresnel reflective solar heat collecting device combined with a sun room, and belongs to the technical field of solar energy utilization. Background technique [0002] The commercial development and utilization of solar energy is an important development trend in the field of renewable energy. The International Energy Agency (IEA) predicts that by 2040, solar power will account for more than 20% of the world's electricity supply. Concentrating solar thermal power generation technology, as an important way of solar energy utilization, has become one of the important directions of international solar technology development. China's "Eleventh Five-Year Plan for Renewable Energy Development" also clearly stated that it is necessary to select suitable areas to develop solar thermal energy in the Ordos Highlands of Inner Mongolia along the Yellow River flat desert, Gansu Hexi ...

AI Technical Summary

Problems solved by technology

[0005] However, the development and application of linear Fresnel reflective solar systems are not ideal at present. There are many reasons for this situation. One of the important reasons is that the maintenance cost of linear Fresnel reflective solar energy is too high, mainly because the mirror surface is long-term. Exposure to the air, the mirror surface will affect the reflectivity due to dust coverage, resulting in a significant decrease in the optical efficiency of the solar thermal collection system, and the cleaning of the reflective mirror requires a lot of manpower and material resources; in addition, the solar thermal collection system (including rotating brackets, reflective Mirrors, heat collectors, etc.) have been exposed to wind, sun, and rain for a long time, which seriously affects the life of the system, especially the rotating mechanism and mirror surface, resulting in high post-maintenance costs of the system; linear Fresnel reflective systems Placed on the north-south axis, the rotation angle is large, and there are shadows and occlusion problems in the adjacent mirrors, resulting in low optical efficiency of the system. Although the shadows and occlusions can be reduced by increasing the height of the receiver and the distance between adjacent mirrors, it will cause site utilization. Problems such as low and increased end loss

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