Complementary type supercritical carbon dioxide and organic Rankin union power generation system and method

Abstract

The invention discloses a complementary type supercritical carbon dioxide and organic Rankin union power generation system and a complementary type supercritical carbon dioxide and organic Rankin union power generation method. Outlets of a solar heat collector and a boiler communicate with a supercritical carbon dioxide working medium inlet of a supercritical carbon dioxide Brayton cycle system; a supercritical carbon dioxide working medium outlet of the supercritical carbon dioxide Brayton cycle system communicates with inlets of the solar heat collector and the boiler; a heat conduction oil outlet of the supercritical carbon dioxide Brayton cycle system communicates with the high temperature end of a low- and medium-temperature heat accumulation system and a heat conduction oil inlet of a low- and medium-temperature organic Rankin cycle system; the low temperature end of the low- and medium-temperature heat accumulation system and a heat conduction oil outlet of the low- and medium-temperature organic Rankin cycle system communicate with a heat conduction oil inlet of the supercritical carbon dioxide Brayton cycle system. The complementary type supercritical carbon dioxide and organic Rankin union power generation system can realize seasonal and continuously shady and rainy high-capacity heat energy adjustment.

Description

technical field [0001] The invention relates to a combined power generation system and method, in particular to a complementary supercritical carbon dioxide and organic Rankine combined power generation system and method. Background technique [0002] Solar energy is an inexhaustible clean energy, but solar energy not only has periodic changes in daily radiation, but also seasonal changes in radiation, and will be affected by weather factors such as rain at any time. At present, it is theoretically possible to use relatively cheap heat storage energy storage to solve the problem of uneven distribution of solar energy day and night, which is also one of the important advantages of solar thermal power generation, but the thermal cycle hopes to improve thermal efficiency by increasing the maximum temperature of the cycle, and as As the maximum temperature increases, the heat storage temperature also continues to increase, which brings greater difficulties to heat storage materi...

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Problems solved by technology

[0006] However, a system that only uses energy storage methods such as heat storage to achieve energy regulation cannot realize the regulation of large-capacity thermal energy such as seasonal and continuous rainy days, but can only realize the regulation of day and night energy in a small range, and only uses solar energy as the low-temperature preheating part The power generation system of the auxiliary heat source has not fully realized the value of high-grade solar energy, and consumes a relatively large proportion of fossil energy. The solar power generation system that does not use heat storage but only uses fossil energy to supplement it also has the problem of excessive consumption of fossil energy. shortcoming

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