Multi-working fluid thermoelectric peak shaving system and operation method thereof

By using a multi-medium heat and power peak-shaving system, which utilizes CO2 and steam circulation, the problem of determining heat based on electricity consumption in cogeneration peak-shaving units is solved, achieving efficient heat and power decoupling and flexible peak-shaving, thereby improving boiler utilization and power generation.

CN116136184BActive Publication Date: 2026-06-05CHINA ENERGY INVESTMENT CORP LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA ENERGY INVESTMENT CORP LTD
Filing Date
2021-11-18
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing combined heat and power (CHP) peak-shaving units suffer from the defect of determining heat output based on electricity demand, resulting in a strong correlation between heat load and power supply load, making it difficult to achieve flexible peak shaving.

Method used

A multi-medium heat and power peak-shaving system is adopted, including a CO2 storage tank, a compressor, a coal-based high-temperature solid heat storage and release device, and a phase change heat storage and release device. Through the recycling of CO2 and steam, high-quality storage and utilization of high-temperature steam is achieved, thereby improving boiler utilization and power generation.

Benefits of technology

It improves the operational flexibility of cogeneration peak-shaving units, achieves heat and power decoupling, increases power generation and heat supply, expands the peak-shaving range, and improves the utilization rate of CO2 resources.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to the technical field of thermoelectric peak regulation, and particularly relates to a multi-working medium thermoelectric peak regulation system and a running method thereof, which comprises a CO2 storage tank, a compressor, a coal-based high-temperature solid heat storage device, a coal-based phase change heat storage device, a steam input port, a steam turbine, and a generator connected with a main shaft of the steam turbine; the CO2 storage tank stores CO2 discharged from the coal-based phase change heat storage device, and can deliver the stored CO2 to the coal-based high-temperature solid heat storage device through the compressor; the coal-based high-temperature solid heat storage device stores heat energy through CO2, and can deliver the heated CO2 to the steam turbine for power generation; the steam input port delivers high-temperature steam to the steam turbine for power generation; and the coal-based phase change heat storage device is used for recovering heat carried in exhaust gas of the steam turbine. Not only the excess steam in the valley section is fully utilized, but also the utilization rate of the boiler thermal system is greatly improved, CO2 is reduced, the operation flexibility of the thermal power plant is improved, and thermal and electric decoupling is realized.
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