Solar thermal and thermal power plant coupled power generation and thermal energy storage combined system and implementation method

Abstract

The invention discloses a solar heat and thermal power plant coupling power generation and heat storage energy combination system and a realization method. The combination system comprises a thermoelectric production module, a thermoelectric heating module, a solar heat module and a heat energy storage module. The solar heat module heats condensated water of the thermoelectric production module to participate in power generation in non heating seasons, so that the coal consumption of the thermoelectric production module is reduced, and the emission is reduced; and in heating seasons, the heat energy storage module and the thermoelectric heating module are coupled to directly supply heat to a heat user pipe network, so that the energy form conversion link is reduced, and the utilization rate of solar energy is increased. The heat energy storage device needed by the solar heat module is shared with the heat energy storage device needed by low-trough electric peak adjustment of the thermoelectric production module, and is lower in unit investment compared with single thermoelectric production module using the low-trough electric peak heat energy storage device; the heat utilization stability of solar energy is enhanced; and meanwhile, the flexibility of the thermoelectric heating module and the peak adjusting capacity of the thermoelectric production module are greatly improved.

Description

technical field [0001] The invention relates to the field of solar heat, the field of cogeneration of heat and power and the field of thermal energy storage, in particular the combination technology of solar heat and thermal power plant coupled power generation and thermal energy storage. Background technique [0002] At present, solar thermal power generation is in the demonstration application stage in our country. Its technical route is: the water is heated into high-temperature and high-pressure steam through the solar heat collection system, and then the steam turbine unit is driven to generate electricity. Due to the instability of solar energy, solar thermal power generation systems are usually equipped with heat storage tanks to ensure the stability of power generation. [0003] Combined heat and power generation is a production method that supplies electric energy and heat energy to users at the same time, or an advanced energy utilization form that simultaneously ...

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Problems solved by technology

[0005] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a solar thermal and thermal power plant coupled power generation and thermal energy storage combination system and its implementation method, which can solve the problems of high investment cost and low heat conversion efficiency of solar thermal power generation projects ; It can also solve the problems of insufficient heating potential of cogeneration units in the heating season and high cost of heat storage projects in low valleys

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