Combined cycle cogeneration system and method based on gas turbine waste heat recovery

CN117514389BActive Publication Date: 2026-10-16SHANGHAI UNIVERSITY OF ELECTRIC POWER +1
2 Cites 0 Cited by

Patent Information

Application Number
CN202311789998.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-25
Publication Date
2026-10-16
Estimated Expiration
2043-12-25

AI Technical Summary

Technical Problem

由于简单的燃气轮机能源利用效率不高，其排烟温度约为400℃～700℃，烟气直接排向大气将造成大量的热量浪费，因此目前多采用蒸汽朗肯循环进行余热回收，但蒸汽朗肯循环占地面积大，且由于耐高温材料的限制，其循环效率难以进一步提升

Benefits of technology

[0020]According to the present invention, a combined cycle cogeneration system based on gas turbine waste heat recovery and its operation method, the system includes a gas turbine cycle power generation system, a supercritical carbon dioxide cycle power generation system, a heating subsystem, a transcritical carbon dioxide cycle power generation system, and an LNG cold energy utilization system. The gas turbine cycle power generation system can simultaneously generate electricity and heat, producing high-temperature flue gas. The supercritical and transcritical carbon dioxide cycle power generation systems can respectively utilize the waste heat of supercritical and transcritical carbon dioxide in the high-temperature flue gas to generate electricity. The heating subsystem can supply the waste heat of supercritical carbon dioxide to the heating network on demand. Furthermore, the LNG cold energy utilization system can absorb and store the waste heat of supercritical and transcritical carbon dioxide, respectively. Therefore, this system enables deep utilization of the waste heat from the gas turbine, significantly improving energy efficiency.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application provides a combined cycle cogeneration system based on gas turbine waste heat recovery and an operation method thereof, and the system comprises a gas turbine cycle power generation system, a supercritical carbon dioxide cycle power generation system, a heat supply subsystem, a transcritical carbon dioxide cycle power generation system and an LNG cold energy utilization subsystem. On the basis of the simple gas turbine cycle power generation system, the waste heat of the gas turbine is deeply recovered and utilized by using multiple advanced cycle systems, so that the problems of large occupied area and difficult improvement of cycle efficiency of the existing gas-steam combined cycle power generation system are solved, and the energy utilization efficiency is improved. In addition, the turbine exhaust of the supercritical carbon dioxide is used for air extraction and heat supply, so that the flexible adjustment of the electric load and the heat load is realized.
Need to check novelty before this filing date? Find Prior Art