Solar power generation system and method adopting non-tracking heat collector and linear power generator

Abstract

The invention relates to a low-temperature waste heat recycling power generation system and method, in particular to a solar power generation system and method adopting a non-tracking heat collector and a linear power generator. The solar power generation system adopting the non-tracking heat collector and the linear power generator comprises the non-tracking heat collector, a piston expansion-linear power generator system, a condenser and a liquid storage device which communicate in sequence, a working medium side inlet of the solar heat collector communicates with an outlet of the liquid storage device, a working medium side outlet communicates with a working medium side inlet of the piston expansion-linear power generator system, a working medium side outlet of the piston expansion-linear power generator system communicates with a working medium side inlet of the condenser, a working medium side outlet of the condenser communicates with an inlet of the liquid storage device, the non-tracking solar heat collector is adopted for absorbing solar heat, the piston expansion-linear power generator system is used for power generation, low-temperature heat collection is achieved, the structure is simple, and cost is low.

Description

technical field [0001] The invention relates to a low-temperature waste heat recovery power generation system and method, in particular to a solar power generation system and method using a non-tracking heat collector and a linear generator. Background technique [0002] Solar energy is an inexhaustible clean energy. Because solar thermal power generation has high theoretical thermal efficiency when collecting heat at high temperature, and it is theoretically possible to use relatively cheap heat storage energy storage to solve the problem of uneven time distribution of solar energy. problems, making solar thermal power generation more and more attention. [0003] However, solar thermal power generation has always been difficult to promote due to its high cost. The energy density of solar energy itself is relatively scattered. At present, traditional power generation devices are suitable for applications with high energy density, such as fossil energy power generation, nucle...

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Problems solved by technology

Among them, the tracking collector, that is, the collector needs to rotate with the light according to the position angle of the sun relative to the ground at different times of the day. This type of collector has high efficiency, but it needs to be equipped with a tracking system, including geared motors, traditional mechanisms, etc. , which increases a lot of cost; the non-focusing collector does not need to rotate, relying on the shape design of its own concentrating mirror to ensure that the sun can gather light to the heat absorber at different angles, the disadvantage is that the concentrating efficiency is low and the heat collecting temperature is low. Low; the focus type collector uses a lens or reflector to gather sunlight on a certain projected area to a point or a line. The cost is related to the requirements of the mirror surface; non-focused collectors, such as flat-plate collectors, rely solely on solar radiation to heat the working fluid, which is simple to manufacture, but the heat collection temperature is low

[0004] To sum up, solar thermal power generation is to compare and choose among a variety of different equipment based on factors such as cost and efficiency, and equip the most reasonable power generation system. At present, most of the power generation equipment used in the field of low-temperature waste heat power generation has relatively high High, complex system; at the same time, in the development and utilization of new energy, the rotary generator is obviously more suitable for high-speed motion, and because the rotary generator cannot maintain high efficiency under relatively low-frequency motion conditions, ordinary The turbines and ordinary generators cannot generate power in the airflow with very low pressure difference and very low temperature difference, and there is a problem that it is not applicable to the field of low temperature waste heat power generation

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