Solar automatic heat collecting and equalizing tube, automatic heat equalizing trough-type module, solar-thermal complementary power generation system comprising the same, and power generation method using the same

A solar-thermal complementary power generation system, the system comprising:

• a solar concentration and heat supply module, a boiler heat supply module comprising a boiler steam drum and a superheater, and a turbogenerator unit, wherein
• the solar concentration and heat supply module comprises a preheating section, a steam-water two phase evaporation section, and a superheat section which are connected in series;
• the preheating section comprises an evacuated solar collector tube;
• the steam-water two phase evaporation section and the superheat section each comprise an automatic heat equalizing trough type module;
• the automatic heat equalizing trough type module comprises a solar automatic heat collecting and equalizing tube and a parabolic trough reflector;
• the solar automatic heat collecting and equalizing tube comprises a glass tube, an absorption tube, and a baffle;
• the glass tube is sleeved on the absorption tube;
• the absorption tube is coated with a heat absorption layer;
• a space between the glass tube and the absorption tube is vacuum;
• the baffle is disposed in an inner cavity of the absorption tube and is configured to drive a fluid in the absorption tube to tumble up and down alternately;
• the baffle is spiral in shape and fixed in the absorption tube;
• the solar automatic heat collecting and equalizing tube is disposed at a focal point of the parabolic trough reflector;
• at least one steam-water separator is connected in series to an output tube at one end of the steam-water two phase evaporation section;
• a steam output end of the steam-water separator is connected to the solar automatic heat collecting and equalizing tube of the superheat section, and the solar automatic heat collecting and equalizing tube of the superheat section is connected to an inlet of the turbogenerator unit;
• a separated water output end of the steam-water separator is connected to the solar automatic heat collecting and equalizing tube of the automatic heat equalizing trough type module via a backflow pipe;
• the output end of the boiler steam drum is connected to the inlet of the turbogenerator unit via the superheater;
• a condenser output end of the turbogenerator unit is connected to a water supply module;
• and
• the water supply module comprises one water inlet pipe, a first water outlet pipe, and a second water outlet pipe;
• the first water outlet pipe communicates with the evacuated solar collector tube, and the second water outlet pipe communicates with a boiler water supply pipe.