High-temperature compression supercritical carbon dioxide cycle combined cycle system and operation method

By designing a high-temperature compression supercritical carbon dioxide cycle cogeneration system, combined with a regenerator and a steam generator, the problem of existing technologies being unable to meet diversified energy demands has been solved, achieving efficient cogeneration of electricity and steam and energy utilization.

CN118959109BActive Publication Date: 2026-05-29XIAN THERMAL POWER RES INST CO LTD
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Patent Information

Application Number
CN202411007266.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-25
Publication Date
2026-05-29
Estimated Expiration
2044-07-25

AI Technical Summary

Technical Problem

Existing supercritical carbon dioxide cycle technologies mainly focus on improving power generation efficiency, lacking the capacity to produce energy products other than electricity, and thus failing to meet users' diversified energy needs, especially the demand for steam.

Method used

A high-temperature compression supercritical carbon dioxide cycle cogeneration system was designed. Through the combination of a main compressor, a regenerator unit, a turbine unit, a re-compressor, a boiler, and a steam supply unit, the system achieves the cogeneration of electricity and industrial steam. It utilizes low-temperature and high-temperature regenerators for multi-stage energy utilization and combines a high-temperature compressor and a steam generator to produce industrial steam.

Benefits of technology

It achieves efficient cogeneration of electricity and industrial steam, improves energy utilization efficiency, reduces energy loss, has good system stability, reduces investment costs, and is suitable for various user needs.

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Abstract

The application belongs to the technical field of power generation, and discloses a high-temperature compression supercritical carbon dioxide cycle cogeneration system and a running method thereof. The system comprises a main compressor, a regenerator unit, a turbine unit, a re-compressor, a boiler and a steam supply unit. The outlet of the main compressor is connected with the regenerator unit, the regenerator unit is connected to the boiler, and the boiler is connected with the turbine unit. The regenerator unit is further connected with the re-compressor and the steam supply unit. The re-compressor is connected with the inlet of the main compressor, and the steam supply unit is used for outputting stable steam supply. The system of the application realizes a large temperature rise by compressing high-temperature regenerator hot-side low-pressure medium-temperature carbon dioxide working medium, and heats water to steam meeting the industrial demand, so that the unit has an industrial steam supply function. Meanwhile, the cold water used for producing industrial steam is preheated by a precooler first, and part of the cold-end waste heat can be recovered, so as to reduce energy loss and improve the energy utilization efficiency of the system.
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