Direct-expansion solar thermal power generation system based on cascade Rankine cycle

A solar thermal power generation and Rankine cycle technology, applied in solar thermal power generation, mechanical power generation with solar energy, machines/engines, etc., can solve the problems of complex design, difficult heat, frequent maintenance, etc., to achieve simple design and manufacturing, power generation efficiency High, high mechanical sealing effect

Inactive Publication Date: 2016-04-06
GUANGDONG FIVESTAR SOLAR ENERGY
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Problems solved by technology

[0003] Usually, the parabolic trough thermal power generation system (PTC-SEGS) adopts the steam Rankine cycle based on the turbo expander, which has the following defects: First, in order to avoid the condensation of water vapor during expansion, only superheated steam (close to or higher than 673K) can enter the turbo
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  • Direct-expansion solar thermal power generation system based on cascade Rankine cycle

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Embodiment Construction

[0036] In the following, the present invention and its beneficial effects will be further described in detail with reference to specific examples, but the specific embodiments of the present invention are not limited thereto.

[0037] Such as figure 1 As shown, the present invention provides a direct expansion solar thermal power generation system based on the cascade Rankine cycle, which includes a parabolic trough collector array 1 and a cascade Rankine cycle. The cascade Rankine cycle includes The steam Rankine cycle and the organic Rankine cycle at the bottom;

[0038] The steam Rankine cycle includes a heat storage tank with phase change materials 2, a gas-liquid separator 3, a steam screw expander 4 and an intermediate heat exchanger 5. The outlet of the parabolic trough collector array 1 is connected to the heat storage tank 2 through a pipeline The inlet of the heat storage tank 2 is connected with the inlet of the gas-liquid separator 3, the outlet of the gas-liquid separ...

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Abstract

The invention belongs to the technical field of thermal power generation and in particular relates to a direct-expansion solar thermal power generation system based on a cascade Rankine cycle. The direct-expansion solar thermal power generation system based on the cascade Rankine cycle comprises a parabolic trough collector array and the cascade Rankine cycle; the cascade Rankine cycle comprises a steam Rankine cycle located at the top and an organic Rankine cycle located at the bottom. Compared with the prior art, the direct-expansion solar thermal power generation system based on the cascade Rankine cycle has the following advantages at the same time: ability of well running at low environmental temperatures, higher power generation efficiency, suitability for small-scale distributed construction, extremely low technical requirements on heat collection and heat accumulation, and high stability and high reliability.

Description

Technical field [0001] The invention belongs to the technical field of thermal power generation, and in particular relates to a direct expansion solar thermal power generation system based on a cascade Rankine cycle. Background technique [0002] Thermal power generation technology is one of the important ways to use solar energy. According to the data of the Concentrated Solar Power Market Research Center, the installed capacity of the global solar power system (SEGS) increased by 32% in 2014 to 4533MW. Among all commercial solar power generation systems, the parabolic trough collector (PTC)-based system is the most mature and mainstream, accounting for approximately 90% of the installed capacity of all operating and under construction power stations. [0003] Usually the parabolic trough thermal power generation system (PTC-SEGS) uses a turboexpander-based steam Rankine cycle. It has the following drawbacks: First, in order to avoid condensation during expansion, only superheate...

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Application Information

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IPC IPC(8): F03G6/06F01K23/02
CPCY02E10/46F03G6/065F01K23/02
Inventor 季杰李晶李鹏程裴刚
Owner GUANGDONG FIVESTAR SOLAR ENERGY
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