Research Field
In response to the significant demand for heat and mass transfer and thermal management technologies in the fields of supercritical CO2 working fluid energy power cycle new systems, new refrigeration materials and systems, and specialized thermal equipment, research and development work are carried out on advanced cycles and equipment, advanced thermal materials, high-density lightweight thermal control technologies, etc.
Team Building
There are currently 21 employees (including 1 rehired), including 3 professors and 7 associate professors/senior engineers; 1 postdoctoral fellow and 47 graduate students.
Project and Major Achievement
In the direction of advanced thermal equipment and circulation, relying on the youth team of CAS and the National Large Science Facility Platform, we have broken through non-equilibrium design and established a key equipment design verification technology system for supercritical CO2, realized the testing capability of 12 MPa/120 kW mixed working fluid in ultra/supercritical cycle system, and established a verification method for flow heat transfer parameter correlation. In terms of micro mechanism research, the phenomenon of severe density fluctuations near the quasi-critical boundary was observed for the first time through molecular models combined with the National Spallation Neutron Source Experiment. The study of thermal property models confirms the mechanism and criteria for the effect of near-critical point thermoacoustic dynamics on heat transfer efficiency. The heat transfer behavior experiment reveals the competitive mechanism between the deterioration of top wall thermal stratification and the enhancement of bottom wall convection, capturing the dynamic evolution characteristics of the transcritical phase transition interface. The newly developed supercritical CO2 reheater has a permissible heating rate of 22°C/min, a maximum heat transfer capacity of 129.4 kW, and an efficiency of 95%. The relevant achievements have strongly supported the progress and breakthroughs of national scientific facilities, providing full-chain technical support from micro mechanisms to engineering applications for the design of low-carbon energy power systems.
In terms of advanced thermal control, a distributed jet array cooling structure has been developed, achieving a cooling capacity of 1338.7 W/cm² (pressure drop of 84.7 kPa). We completed the construction of a high-performance temperature control test platform for drilling fluid commissioned by the enterprise, as well as the performance testing of the cooling structure. We have fulfilled the construction of a lightweight thermal management pump driven phase change heat extraction system test platform for high-power density devices in space, and conducted tests on microstructure condensation heat transfer and high heat flux phase change heat extraction characteristics.We have finished the optimization and improvement of the temperature measurement system in the institute's instrument development and LJ special project, as well as the preliminary testing and verification of the component test bench. We have also designed, integrated, calibrated, and delivered two sets of fiber optic temperature measurement systems for the enterprise commissioned project.
In terms of advanced thermal materials, two types of thermal storage materials, adsorption and thermochemical, have been developed, and third-party testing of thermal storage density has been completed. We studied the heat and mass transfer enhancement technology of thermal storage unit components and proposed a scheme to improve the performance of thermal storage and release power, completed various heat exchange structure coating bed and particle bed adsorption refrigeration performance tests, and delivered multiple coating beds to the enterprise, assisting in manufacturing a 10-kW adsorption refrigeration unit. A precise numerical model of high filling thermal interface materials was constructed, and genetic algorithm was used to optimize the distribution of ternary thermal conductive fillers, significantly improving the thermal conductivity of thermal interface materials.
Patent and Paper
In 2024, 37 academic papers were published, among which 23 were indexed by SCI and 8 was included in EI, 10 invention patents were applied for and 11 patents were authorized (including 4 utility models), 3 software copyrights were obtained.
International Cooperation and Exchanges
The Heat and Mass Transfer Research Center, as the leading unit, hosted the 2024 International Conference on Supercritical CO2 Power Cycle and Comprehensive Energy Systems (ICSPC2024) in September 20-23, 2024, with approximately 400 participants.
Professor CHEN Lin participated in the 3rd Global Summit on Power and Energy Engineering (GSPEE2024) in March 18-20, the 2024 8th International Conference on Hydrodynamics, Energy and Electric Power System (HEEPS-2024) in June 24-26, the 2nd International Multiphase Flow Technology Forum (IMFTF2024) in July 2-5, the 5th International Symposium on Thermal-Fluid Dynamics (ISTFD-2024) in July 26-29, the 10th World Conference on Experimental Heat Transfer, and the 2nd International Workshop on Engineering Physics (IWEP 2024) in October 27-28, and gave Plenary Talks. Professor CHEN Lin participated in the Fluid Mechanics and Thermodynamics (ExHFT-10) in August 26-30, and has been elected as a General Member of the Assembly of World Conferences on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics. Associate Professor FENG Yongchang participated in the 5th International Symposium on ThermalFluid Dynamics (ISTFD-2024) in July 26-29 and gave an Invited Talk. Professor CHEN Lin, Associate Professor XU Min, Associate Professor FENG Yongchang, and Senior Engineer CHENG Keyong, PlFl Visiting Scientist Professor Pavel Skripov, Professor Daniel Beysens and Professor Youcef Bouaichaoui participated in the 2024 International Conference on Supercritical CO2 Power Cycle and Comprehensive Energy Systems (ICSPC2024) in September 20-23, 2024 and gave presentations.
Dean: CHEN Lin 86-10-82545735 chenlin2018@iet.cn
Vice Dean: LI Xunfeng 010-82543035 lixunfeng@iet.cn
Download the attachment
Laboratory