Free piston linear generator solar thermal power generation system and method with heat storage function

Abstract

The invention relates to a free piston linear generator solar thermal power generation system and method with a heat storage function. The free piston linear generator solar thermal power generation system comprises a solar thermal collector, a working medium side outlet of the solar thermal collector is divided into two paths, one path is connected with a valve c, the other path is connected witha valve d, the valve c is connected with an energy storage system, an outlet of the energy storage system is connected with an inlet of a valve e, the outlet of the valve e and the outlet of the valve d are converged and then connected with the free piston linear generator, an exhaust port of the free piston linear generator is connected with a condenser, the outlet of the energy storage system is connected with the inlet of the valve f, the outlet of the valve f and the outlet of the condenser are converged and then connected with the inlet of a liquid storage device, the outlet of the liquid storage device is divided into two paths, one path is connected with the inlet of the valve a, the outlet of the valve a is connected with the inlet of the solar thermal collector, the other path ofthe outlet of the liquid storage device is connected with the inlet of the valve b, and the outlet of the valve b is connected with the inlet of the low-temperature side of the energy storage system.The system and method have the advantages of high efficiency, low cost and wide working range.

Description

technical field [0001] The invention relates to the technical field of power generation systems, in particular to a solar thermal power generation system and method of a free-piston linear generator with heat storage. 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, nuclear power, etc. In occas...

AI Technical Summary

Problems solved by technology

The tracking type means that 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 adds a lot cost

The non-focusing type does not need to be rotated, relying on the shape design of the concentrating mirror to ensure that the sun can gather light on the heat absorber at different angles. The disadvantage is that the concentrating efficiency is low and the heat collection temperature is low.

Focusing collectors use lenses or reflectors to gather sunlight on a certain projected area to one point or a line. The advantage is that the heat collection temperature is high, and the disadvantage is that it is necessary to manufacture reflectors or lenses with geometrical requirements, which increases the cost. , the cost is related to the mirror requirements

Non-focused collectors, such as flat-plate collectors, rely solely on solar radiation to heat the working medium, which is simple to manufacture, but the heat collection temperature is relatively low

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