High Pressure Tower Solar Water/Molten Salt Composite Flat Tube Hot Plate Heat Absorber

Abstract

The invention discloses a high-pressure tower type solar water / fused salt composite type flat-tube hot plate heat absorber which is a cavity structure formed by a plurality of heat absorbing units in an enclosing mode. The heat absorbing units are connected with medium pipes to form the cavity with 6 / 5pi of radian, and the inner side of the arc-shaped cavity is a sunlight absorbing face. The heat absorbing units are formed by connecting and processing seal heads onto specific positions of heat absorbing plates through argon arc welding. Each heat absorbing unit consists of a heat absorbing plate and seal heads, wherein the heat absorbing plate is of a double-layer flat plate shaped structure, an outer layer is a heat absorbing temperature-equalizing heat plate, and an inner layer is a high-pressure flat-tube type water / steam channel. The seal heads are located at two ends of the high-pressure flat-tube type water / steam channel. The high-pressure tower type solar water / fused salt composite type flat-tube hot plate heat absorber is good in starting performance, high in heat transfer efficiency, even in overall temperature distribution under the work conditions, creep-deformation-resisting, strong in fatigue rupture, advanced in manufacture process, high in safety and long in service life, a flat tube can bear high pressure, the temperature difference of the heat plate is reduced effectively, warm start time is shortened, and the pressure bearing capacity of the heat absorber is improved.

Description

technical field [0001] The high-pressure tower type solar water / molten salt composite flat tube heat absorber of the present invention relates to a solar thermal power generation heat absorber, in particular to a water absorber used in a large-scale tower type solar thermal power generation system / Steam heat sink. Background technique [0002] In the 21st century, with the depletion of fossil fuels and the seriousness of environmental pollution, energy issues have become a bottleneck restricting the rapid development of my country's national economy. Solar energy is clean and non-polluting, and has a wide range of sources. The development of solar energy is of great significance to solving energy problems. [0003] Compared with the butterfly and trough thermal power generation technologies, the tower solar thermal power generation system has the advantages of high concentration multiple, high photothermal conversion efficiency and low power generation cost. A typical tow...

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Problems solved by technology

In the molten salt system, there are problems such as decomposition of molten salt at high temperature and chloride corrosion cracking caused by condensation, as well as problems such as venting, cold charging and heat preservation of the molten salt medium in the heat absorber and pipeline; in the air system, due to the existence of flow Uneven and local overheating and failure problems, related applications are also greatly limited; and the most mature water / steam heat absorber is also unevenly heated, the equipment has high pressure bearing capacity requirements, and there are burn points, as well as fatigue and creep. Lifespan problems such as variable damage

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