Molten salt heat storage solar thermal power generation system

Abstract

The invention discloses a molten salt heat storage solar thermal power generation system. The system comprises a heat collecting subsystem, a heat storage subsystem, a steam generation subsystem and a power generation subsystem connected in sequence; the heat collecting subsystem is connected with the heat storage subsystem; the heat storage subsystem is connected with the steam generation subsystem; and the steam generation subsystem is connected with the power generation subsystem. As the connecting relation of the steam generation subsystem to the heat collecting subsystem and the heat storage subsystem is improved, the power load output stability of the power generation subsystem is improved; and the power load output by the system is not changed along with the change of solar radiation, so that the load fluctuation is largely reduced, and the whole control operability of a power station is promoted.

Description

technical field [0001] The invention relates to a trough-type molten salt heat storage solar thermal power generation system, in particular to a trough-type molten salt heat storage solar thermal power generation system capable of stably outputting electric load. Background technique [0002] The full name of the trough solar thermal power generation is "trough parabolic concentrating solar thermal power generation". The heat transfer fluid heats the water into water vapor through the heat exchange system, and drives the clean energy utilization device of the turbo generator set to generate electricity. [0003] The trough solar thermal power generation technology is currently the most mature in the world, and it is also the solar thermal power generation technology with the most commercially operated projects. The advantages of trough solar thermal power generation technology are: the system is compact in structure, and its solar thermal radiation collection device occupie...

AI Technical Summary

Problems solved by technology

To a certain extent, the temperature and flow of the heat transfer oil change with the change of solar radiation, resulting in the change of the steam parameters in the steam generation subsystem, which in turn easily causes the load fluctuation of the steam turbine output in the power generation subsystem

Although the system is equipped with an energy storage subsystem, the energy storage device can be used to eliminate load fluctuations when the turbine output fluctuates, but the heat output pipe of the heat storage It takes a certain amount of time to enter the heat release stage, resulting in a time difference. During this period, the load change of the steam turbine cannot be eliminated, which adds great difficulty to the control of the power station.

Images