Power generating system

Abstract

The invention relates to a power generating system comprising a high-temperature heat storage medium storage tank, a low-temperature heat storage medium storage tank, a heat exchange device, a turbine, a generator and a steam exhausting condensation device. The heat exchange device comprises two superheaters, two evaporators in series connection and two preheaters. The high-temperature heat storage medium storage tank, the superheaters, the evaporators, the preheaters and the low-temperature heat storage medium storage tank are connected in sequence to form a passage for circulating of a heat storage medium. The steam exhausting condensation device, the preheaters, the evaporators, the superheaters and the turbine are connected in sequence to form a passage for circulating of a water working medium. After the water working medium and a high-temperature heat storage medium are subjected to heat exchange in the heat exchange device, steam is formed and allows for working of the turbine, so that the generator is driven to generate power. The steam exhausted from the turbine enters the steam exhausting condensation device to form condensed water serving as the water working medium, and the water working medium enters the heat exchange device to be subjected to heat exchange with the high-temperature heat storage medium. Compared with the prior art, the ability of failure coping of the whole power generating system is improved through the heat exchange device.

Description

Technical field [0001] The invention relates to the field of solar thermal power generation, in particular to a power generation system. Background technique [0002] With the continuous burning of traditional fossil fuels, there are fewer and fewer conventional energy sources available to mankind, and the massive consumption of fossil energy has destroyed the ecological environment for human existence, seriously threatening human safety and survival. In order to protect the earth's ecological environment on which mankind depends, measures must be taken to reduce the consumption of fossil energy, vigorously develop and utilize clean and clean new energy and renewable energy, and take the road of green energy in harmony with the ecological environment. [0003] Solar energy is the most abundant permanent energy in the world. The total amount of solar energy received by the earth every year is 1×1018kW·h, which is equivalent to 5×1014 barrels of crude oil, which is nearly a thousand ...

AI Technical Summary

Problems solved by technology

Using a single heat exchange device in the case of a certain system equipment failure will directly affect the operation of the heat exchange device, indirectly cause the entire power generation system to shut down, cause the power station to fail to generate electricity normally, and cause a series of losses

On the other hand, tower-type solar thermal power stations often require low-load operation of the system due to grid requirements or system operation requirements. At this time, the heat exchange device needs to cooperate with the steam turbine to achieve low-load operation and variable load operation. Under low load conditions, the heat exchange device will have problems such as low operating efficiency and poor heat exchange effect.

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