Biomass heat- and solar-energy multistage cooling, heating and power combined supply system

Abstract

The invention provides a biomass heat- and solar-energy multistage cooling, heating and power combined supply system and belongs to the technical field of energy resource and environment. The biomass heat- and solar-energy multistage cooing, heating and power combined supply system comprises a heat transfer fluid circulation loop, a power generation loop, a cooling and power combined supply loop, a solar energy circulation loop, a biomass burning furnace smoke discharge pipeline, a heat and hot water supply loop and a cooling water loop, wherein the power generation loop is composed of a direct-contact type evaporator, a first turbine, a first heat regenerator, a condensation evaporator, a first liquid storage tank and a first working medium pressurizing pump, and the solar energy circulation loop comprises a heat storage and exchange device, a second heat transfer fluid circulation pump and a solar heat accumulation heater. The biomass heat- and solar-energy multistage cooling, heating and power combined supply system is high in heat exchange efficiency, gradient utilization of heat is realized, energy utilization efficiency is high, cooling, heat and power can be continuously and stably output, the direct-contact type evaporator is simple in structure and the like; output load of a biomass burning furnace and output load of the heat storage and exchange device can be adjusted according to needs of heat users for cooling load, heat supply load and power supply load.

Description

technical field [0001] The invention relates to a biomass thermal energy and solar energy multi-stage combined cooling, heating and power supply system, which belongs to the technical field of energy and environment. Background technique [0002] Power production is playing an increasingly important role in modern production and life. It can be said that power supply is the bottleneck of the development of the whole society. For a century, the power industry has relied heavily on fossil fuels. Although in recent years, with the application of supercritical Rankine cycle and other technologies, the efficiency of coal power has gradually increased (the latest technology in the world can now reach a thermal efficiency of nearly 50%), but The power industry is still the main emission source of serious environmental pollutants such as carbon dioxide and sulfur dioxide. At the same time, with the depletion of fossil fuels, the cost and difficulty of mining will increase. Therefore...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a biomass thermal energy and solar energy multi-stage cooling, heating and power cogeneration system, which uses a direct contact evaporator instead of an ordinary evaporator, simplifies the heat exchange equipment, and improves the heat exchange efficiency; As a solar collector heater, the heat pipe solar collector effectively improves the heat collection efficiency and makes the heating more uniform; the phase change heat storage device is used to improve the heat storage capacity and also strengthen the continuous energy supply capacity of the system; at the same time, it adopts The two-stage organic Rankine cycle realizes the cascade utilization of energy while improving the system efficiency, and solves the problem that the conventional power generation cycle cannot effectively utilize low-temperature heat energy

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