Thermoelectric decoupling system and operation method based on absorption heat pump and heat storage equipment

Abstract

The invention discloses a thermoelectric decoupling system based on absorption heat pumps and a heat storage device and an operation method thereof. The system comprises a boiler, a steam turbine high-pressure cylinder, a steam turbine medium-pressure cylinder, a steam turbine low-pressure cylinder, a condenser, a condensate pump and a heat recovery system, wherein the boiler, the steam turbine high-pressure cylinder, the steam turbine medium-pressure cylinder, the steam turbine low-pressure cylinder, the condenser, the condensate pump and the heat recovery system communicate with one anotherin sequence; the system further comprises the single-effect absorption heat pump driven by exhaust steam of the medium-pressure cylinder and the double-effect absorption heat pump driven by heat storage of the heat storage device, the single-effect absorption heat pump and the double-effect absorption heat pump can be switched, and a heat supply system is formed by the single-effect absorption heat pump and the double-effect absorption heat pump; when a unit participates in peak load regulation, the double-effect absorption heat pump is driven to supply heat by utilizing heat stored in the heat storage device by part of main steam; when the unit does not participate in peak load regulation, the exhaust steam of the medium-pressure cylinder drives the single-effect absorption heat pump to supply heat; the double-effect absorption heat pump can meet larger heat load, the performance coefficient is larger, the unit can realize thermoelectric decoupling, the cascade utilization of energy is realized, and the energy utilization efficiency is improved; and when the main steam is adopted for heat storage, because the grade is high, less heat can be stored enough to meet the heat supply requirement, and the heat storage device with a smaller size can be adopted.

Description

technical field [0001] The invention relates to the technical field of cogeneration of heat and power, in particular to a thermoelectric decoupling system and an operating method based on an absorption heat pump and heat storage equipment. Background technique [0002] In 2018, the country's new wind power and solar power installed capacity accounted for 52.84% of the total new installed capacity. One of the outstanding contradictions in my country's cogeneration industry is that the growth of electricity consumption is weak, while the demand for heat continues to increase, which limits the development of large-scale condensing cogeneration units. With the continuous expansion of wind power grid-connected scale, the phenomenon of wind curtailment during the low load period during the winter heating period is becoming more and more serious. During the low valley period, the forced output of the system is too high, and the space for wind power grid connection is insufficient....

AI Technical Summary

Problems solved by technology

With the continuous expansion of wind power grid-connected scale, the phenomenon of wind curtailment during the low load period during the winter heating period is becoming more and more serious. The forced output of the system is too high during the low valley period, and the space for wind power grid connection is insufficient

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