A few day ago, the 5MWe supercritical CO2 cycle power generation test unit with the highest parameters and the largest capacity in the world, with HBC as one of the manufacturers, successfully completed a 72-hour test run at Huaneng Xi''an Thermal Engineering Institute and was officially put into operation. The smooth operation of the project attracted the attention of China Central Broadcasting and  Television Station and was reported in the “Morning News Show” in the morning news program in news channel.

Supercritical CO2 power generation is a new and efficient power generation technology with multiple advanced features. Moreover, the supercritical CO2 power generation system is simple and compact in structure, more flexible, and can achieve complete thermo-electricity decoupling of (It is possible to achieve relatively independent scheduling and distribution of thermal energy and electric energy, and especially during the heating period in winter, it is possible to effectively reduce the power abandonment rate and greatly improve the peak shaving performance of power generation unit). It can provide strong support for deep peak shaving for intermittent or unstable renewable energy such as solar energy and wind energy. Such performance can meet the major needs of future energy system construction. Compared with the traditional steam Rankine cycle, the 5MWe supercritical CO2 cycle power generation test unit, with HBC as one of the manufacturers, adopts Brayton cycle. Under the same parameters, the power generation efficiency can be increased by 3%-5%. As one of the core equipment for supporting the test platform, the input thermal power of the supercritical CO2 boiler independently developed and manufactured by HBC is close to 20MW, with supercritical CO2 as the work medium within the heating surface. Compared with thermal transfer characteristics of the boilers with H2O as the work medium, in terms of the parameters, it has the characteristics of large flow rate and small enthalpy rise. The supercritical CO2 boiler adopts a general layout structures, including an L-shaped layout, which is more convenient for on-site test, single intermediate reheat and low NOX burners, which are arranged on top position. Such arrangement can well fit the construction goal of the test platform, which is mainly used for cycle test, equipment test and verification.  

Relying on the 5MWe supercritical CO2 cycle power generation test unit project of Huaneng Xi''an Thermal Engineering Institute, HBC developed a gas-fired supercritical CO2 boiler fully independently. Included in its core technologies were furnace type selection, in-furnace combustion and work medium heat transfer coupling calculation method, work medium cycle dynamic calculation, etc., which represented the world leading level in R&D of supercritical CO2 boilers. Many of its design technologies and manufacturing processes were used for the first time in China. Taking such case as an opportunity, the project in the title of the “Study on the Key Technologies of the CO2 Boiler Quality Evaluation System and Demonstration of Its Application” was successfully prepared by HBC, as the leading party, to apply for the project of the national key R&D plan. HBC also was awarded one project funded by Heilongjiang Youth Elite Funds. A contract was signed with Shenhua Guohua Electric Power Research Institute in the title of the “Study on the Key Technologies of Supercritical CO2 Cycle Coal-fired Boiler and Its Preliminary Design”. The supercritical CO2 boiler research and development system focusing on material inspection, design, manufacturing, quality control and operation monitoring was basically formed within HBC. Such work provided a full cover on the whole process of the first domestic supercritical CO2 boiler from design, manufacture up to its utilization, and filled in the gap in design and manufacture of supercritical CO2 boiler in China.

At present, taking technical R&D of higher capacity supercritical CO2 power generation boiler as the breakthrough direction, HBC is gradually increasing the size of supercritical CO2 power generation equipment and commercialize such equipment, improving the efficiency and deep peak shaving capacity of our country''s thermal power plants, promoting transformation and upgrading of China''s energy structure and devoting HBC’s wisdom and strength to the goal of “carbon dioxide emission and carbon neutrality”.