Pressure-bearing type solar collector based on groove-type parabolic mirror

Abstract

The invention relates to a pressure-bearing type solar collector based on a groove-type parabolic mirror. The parabolic mirror is characterized by comprising an elliptical reflecting canister, a housing, a groove-type parabolic condenser and a pressure resistant metallic heat collection pipe group, wherein the reflecting canister adopts an elliptical stainless steel mirror reflecting canister or a glass reflecting canister; a light inlet is formed in the elliptical reflecting canister; the housing is arranged outside the reflecting canister; a gap between the housing and the reflecting canister is filled with heat insulating materials; the pressure resistant metallic heat collection pipe penetrates the reflecting canister; and the light condensation focus of the groove-type parabolic condenser is positioned at one focus near or around one side of the light entrance port. According to the solar collector provided by the invention, the heat absorbing medium is positioned in the pressure resistant metallic heat collection pipe groups in the black body cavity, so as to enable the whole heat-collector to manufacture the pressure-bear structure smoothly, the requirement of the process and material is decreased greatly, the manufacturing cost of the pressure-bearing type solar collector based on the groove-type parabolic mirror is decreased, the performance of the heat collector is more steady and reliable, and the safety coefficient is high.

Description

technical field [0001] The invention relates to a solar heat collector, in particular to a pressurized solar heat collector based on a trough parabolic reflector. Background technique [0002] With the rapid development of global industrialization, the consumption of traditional energy such as oil, natural gas, and coal continues to increase, and the global energy crisis is becoming increasingly serious. New energy has become one of the five most decisive technological fields in the world economic development in the 21st century. Solar energy is a clean, efficient and inexhaustible new energy source. In the new reality, the governments of all countries regard the utilization of solar energy resources as an important content of the national sustainable development strategy. [0003] In the heat utilization of solar energy, the key is to convert the sun's radiant energy into heat energy. Because the solar energy is relatively scattered, it must be concentrated, so the hea...

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Problems solved by technology

[0007] The above-mentioned solar heat collector can make full use of the characteristics of the high absorptivity of the black body cavity to fully absorb the focused light to achieve heat collection, and has a high heat collection efficiency, but there are still certain defects: when using the black body cavity to absorb the heat of sunlight, the replacement The heat medium is arranged in the interlayer between the inner and outer layers of the heat collector. This structure makes the heat collector suitable for making a non-pressure-bearing solar heat collector. The cross-section of the interlayer is not a full circle, that is, a ring shape Therefore, its heat collection function is not good, and the heat collection temperature is between 100°C and 110°C; if the pressure-bearing structure is forced to be used, the materials on both sides of the black body cavity medium interlayer , The process requirements are very high, requiring high cost, and there are certain obstacles to the promotion of heat collectors

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