Dish type solar energy thermal power generation system and heat collector thereof

Abstract

The invention relates to the technical field of a solar energy thermal power generation system and discloses a heat collector used for a dish type solar energy thermal power generation system. The heat collector comprises a heat collecting cavity and at least one layer of heat-absorbing coil, wherein the heat collecting cavity is provided with an opening part, the heat-absorbing coil forms a cavity structure, the cavity structure is provided with an opening hole, the cavity structure is arranged in the heat collecting cavity, the opening hole is aligned to the opening part, and a low temperature inlet of the heat-absorbing coil is arranged on the position with the largest energy distribution density of the incident light of the cavity structure. The heat collector can prevent the heat-absorbing coil from being eroded because of the partial overtemperature and from being burnt due to sudden fall of a convection heat transfer coefficient resulted from working medium phase change. The invention also discloses a solar energy thermal power generation system with the heat collector.

Description

technical field [0001] The invention relates to the technical field of solar thermal power generation systems, in particular to a heat collector used in a dish-type solar thermal power generation system. The present invention also relates to a dish-type solar thermal power generation system with the above-mentioned heat collector. Background technique [0002] Energy is an important basis for economic and social development. Since the industrial revolution, the world's energy consumption has increased sharply, traditional fossil energy resources have been consumed rapidly, and the ecological environment has continued to deteriorate. In particular, greenhouse gas emissions have led to increasingly severe global climate change. The sustainable development of human society Development is seriously threatened. Solar energy is generally favored because of its unlimited reserves, universal distribution, clean utilization and economical characteristics. It is considered to be one ...

AI Technical Summary

Problems solved by technology

[0007] According to the principle of optics, the energy distribution density of the parallel light converged by the rotating paraboloid is not uniform, coupled with the influence of the manufacturing precision of the concentrating disc, the light energy directly irradiated on the heat-absorbing coil is also uneven, and it is easy to form a local high temperature zone. Once the local temperature exceeds the allowable temperature of the heat-absorbing coil material, it will cause the heat-absorbing coil to be ablated or even burned

[0008] In addition, due to manufacturing precision, wind load and other factors, the shape and size of the converging focal spot of the concentrating disc often deviate from the design value, which cannot guarantee that all the light reflected by the concentrating disc can enter the heat collecting cavity, and some light will always be projected on the The surface temperature of the collector increases due to the outside of the collector, or even burns out

Images