China's First Supercritical Carbon Dioxide Solar Thermal Power Generation Unit Project Passes Acceptance Check
TapTechNews August 22nd news, today (August 22nd), the Institute of Electrical Engineering of the Chinese Academy of Sciences released a blog post announcing that China's first supercritical carbon dioxide solar thermal power generation unit project has passed the acceptance check.
Project Background
Supercritical carbon dioxide working fluid power generation technology, as a new energy technology with high efficiency, strong flexibility, environmental protection and low cost, has broad application prospects and development space.
Project Introduction
The project is fully named Research on Key Basic Problems of Supercritical Carbon Dioxide Solar Thermal Power Generation, and the project implementation site is located in Yanqing, Beijing. It is led by the Institute of Electrical Engineering of the Chinese Academy of Sciences and is a key special project of the national key R & D plan Renewable Energy and Hydrogen Technology Plan.
TapTechNews learned from the report that after 5 years of technical research by the research team, three key scientific issues have been focused on solving:
In terms of the design theory and method of high-temperature heat absorbers
The team established the temporal and spatial coordinated absorption, conversion and heat transfer mechanism of concentrated solar radiation in the flexible discontinuous particle flow, developed 3 types of concentrators and 4 types of heat absorbers including a 700°C/1MWth particle heat absorber, and proposed 2 types of high-density energy measurement methods.
In terms of the key scientific issue of the influence mechanism of the heat storage and heat release mode on the system performance
The team explored the mechanism of molten salt inhibiting metal corrosion, broke through the heat transfer characteristics matching between high-temperature solid heat-absorbing particles and supercritical CO2 under variable heat flux, variable temperature and strong variable physical properties conditions, and developed 3 types of heat storage and heat exchange devices including a 550°C/1MWth fluidized bed particle/supercritical CO2 heat exchanger.
In terms of the interaction mechanism of the energy conversion process
The team constructed the constitutive matching relationship of the main parameters of the high-efficiency solar thermal power generation system with high solar flux, high temperature, high expansion ratio and high specific power, developed the whole system model of light-heat-electric energy conversion with supercritical CO2 flow as the core, developed a 550°C/200kW supercritical CO2 turbine generator set, established an empirical system of light-heat-electric based on supercritical CO2 working fluid, and achieved operation.
Project Acceptance
The 10 experts of the project performance evaluation expert group, researcher Li Zixin, deputy director of the Institute of Electrical Engineering, Zhang Shiyue, the project supervisor of the High Technology Research and Development Center of the National Natural Science Foundation of China, as well as the research backbones of a total of 18 project participating units such as the Institute of Electrical Engineering, Xi'an Jiaotong University, Zhejiang University, Tsinghua University, and Huaneng Xi'an Thermal Power Research Institute attended the meeting.
The project leader, researcher Wang Zhifeng of the Institute of Electrical Engineering, detailedly reported the implementation and completion of the project, and demonstrated the operation of the 200kW supercri tical CO₂ solar thermal power generation system on site.