High-efficiency tower solar power station heat collector system with diameter gradually varied heat absorbing tubes

Abstract

The invention provides a high-efficiency tower solar power station heat collector system with diameter gradually varied heat absorbing tubes. By adoption of the high-efficiency tower solar power station heat collector system with the diameter gradually varied heat absorbing tubes, the surface temperature of the heat absorbing tubes in a radiant heat flux concentration area can be decreased, the degree of superheat of partial surface of a heat collector can be reduced, and the service life of the heat absorbing tubes can be prolonged. Each heat absorber module is attached against and arranged on the surface of the heat collector in the horizontal direction; heat absorbing tubes in a same heat absorber module have the same tube diameter and specification; the diameter and the specification of heat absorbing tubes in different heat absorber modules are different; heat absorber modules composed of the heat absorbing tubes with the same tube diameter and the specification are symmetrically arranged on the heat collector, the symmetry axis is the straight line where the density maximum value of the radiant heat flux of the surface of the heat collector is located, and the straight line is in the same direction as the self central axis of each heat absorbing tube; and the heat absorber modules are sequentially arranged from small to large according to the tube diameter and the specification of the heat absorbing tubes, the heat absorbing tube in the heat absorber module, closest to the symmetry axis, has the smallest tube diameter, and the heat absorbing tube in the heat absorber module, furthest way from the symmetry axis, has the largest tube diameter.

Description

technical field [0001] The invention relates to a heat collector system of a high-efficiency tower solar power station with gradually changing diameters of heat-absorbing pipes. Background technique [0002] In recent years, with the dramatic increase in energy demand, solar thermal power generation technology is becoming a hot spot in the field of renewable energy worldwide. According to different focusing methods, there are three main forms of solar thermal power generation: trough system, tower system and butterfly system. Compared with the other two forms of power generation, the tower solar thermal power generation system has higher concentration ratio, higher working temperature and longer working life, and is suitable for large-scale power generation, so it has received the most research. [0003] The principle of tower-type solar thermal power generation is that a large number of large reflectors are arranged on an open field, and each reflector is matched with a co...

AI Technical Summary

Problems solved by technology

However, in the actual solar thermal power station, the control of the focal point is realized by the tracking and focusing technology of the heliostat field. The increase in the number of focal points will inevitably increase the difficulty of the tracking control system of the heliostat field, and the heliostat field control technology of the power station will be greatly affected. raised higher demands

And existing heat collector systems of other structures, such as the Chinese patent whose authorized announcement number is CN202947336U, discloses a kind of heat absorber of tower solar power station, this heat absorber adopts multi-module group to connect in parallel, and the heat absorption in the module group At the same time, the heat absorber modules of the same group are scattered and arranged on the surface of the heat absorber. After the working fluid flows through multiple heat absorber modules, the influence of uneven heating on the heat absorber surface on the thermal efficiency of the working fluid is eliminated. , although it can solve the thermal deviation of the working fluid at the outlet of the heat absorber, it cannot reduce the local superheat of the collector surface

Images