Heat and Mass Transfer Research Center

Jul 11, 2023 / Author by Text SizeDBS

Research Fields

New efficient and compact heat exchange technology and equipment, new system theory and application technology of super/trans-critical CO2 working medium energy power cycle, new efficient adsorption refrigeration/ thermochemical energy storage, advanced thermal functional materials and devices, etc.

Team Building

There are currently 17 employees, including 3 professors and 6 associate professors; 5 special research assistants and 35 graduate students currently studying.

Projects and Major Achievements

In terms of new efficient and compact heat exchange technology and equipment, we completed the prototype development and testing of the key technology research project for the efficient heat exchange equipment of the National Energy Group's 100 MW level SCO2 power generation system, and all tasks met the assessment indicators. A thermodynamic model for the recompression SCO2 cycle was established; the influence of different structural regenerator parameters on system performance was obtained, and the annual task of the youth team project of the institute was completed. A performance testing platform for the humidified gas turbine reheater was built; a performance prediction model and software was established, and the error between the prediction and test results is less than 5%. The milestone tasks for the two units were completed.
 
In terms of the theory and application technology of the new system of energy and power cycle for super/trans-critical CO2 working fluids, we established a basic theoretical framework for non-equilibrium energy and mass transfer in super/near-critical fluids, and discovered new mechanisms of critical distance and critical fluctuations; A phase shifting interference and fluorescence molecular probe coupling measurement platform was built to achieve precise measurement of supercritical thermal convection, jet and phase equilibrium processes; A critical transfer and cycle theoretical model was developed, and a new design was obtained for enhancing the efficiency of the Brayton cycle with supercritical CO2 compression energy storage cycle and thermal storage assistance.
 
In terms of new efficient adsorption refrigeration/thermochemical energy storage, we have developed the optimized preparation and amplification process of SFO type aluminum phosphate molecular sieve materials, completed the preparation and molding of 100 kg materials, and built a 10 kW class aluminum phosphate water Adsorption refrigeration prototype. Calcium based nanomaterials suitable for high-temperature thermal storage was developed, with a thermal storage temperature reduced by 56°C compared to unmodified materials; a 350 kWh open type valley electricity adsorption heat storage heating pilot system has been built and successfully operated, with a heat storage density of 120 kWh/m3 and a heat release power of 35 to 60 kW.
 
 In terms of advanced thermal functional materials and devices, we have mastered key technologies such as multidimensional and multi-scale thermal conductive powder filler dispersion and surface modification, and key processes such as polymer structure control and heat conduction path construction. We have developed a series of silicon free phase change materials with high thermal conductivity and low thermal resistance, liquid metal heat transfer paste, thermal conductive silicone grease, high resilience lightweight heat transfer gasket, and thermal conductive structural adhesive for different needs. 0.4 mmVC and 1.2 mmLHP technology was mastered, with an immersive cooling and heat dissipation capacity of 600 W; the design and construction of a high-power chip long-distance heat transmission and dissipation system was completed, and passed the test, with an equivalent thermal conductivity of 1200 kW/(m?K). Intellectual property rights were invested in industrialized companies and completed team equity incentives.
 
In terms of advanced non-contact temperature measurement, based on the research needs of the Institute's instrument development project and the two machine projects, the mechanism of the effect of operational and structural parameters on the protective performance of temperature probes was explored; the influence of various factors on the accuracy of multispectral temperature measurement was studied; multifunctional blade temperature measurement software was developed; a temperature measurement module has been built, and all testing indicators meet the annual node requirements.
 

Technology Transfer

Over 10 projects commissioned by the enterprises were being implemented and the total contract funds are over 20 million CNY.

Patents and Paper

In 2022, 30 papers were published, among which 25 were indexed by SCI, including 1 in Nature communications. 20 patents were applied for and 4 patents were authorized.

International Cooperation and Exchanges
The team member CHEN Lin participated in the "International Conference on Renewable and Sustainable Energy" and gave a special invited speech; attended the "Global Online Summit on Biofuels, Bioenergy and Renewable Energy" and made a special report; participated in the "First World Congress on Multiphase Transport, Energy Conversion and Utilization" and gave a special invited speech, and received excellent paper award; participated in the "Third International Symposium on Thermofluid Dynamics" and gave a special invited speech; participated in the 13th Asian Thermophysical Conference and gave a special invited speech; participated in the 23rd Pacific Nuclear Energy Conference and gave a special invited speech; participated in the 19th International Conference on Fluid Dynamics and gave a special invited speech, and won an excellent paper award.
 
Dean: HUAI Xiulan 86-10-82543108 hxl@iet.cn
Vice Dean: CHEN Lin 86-10-82545735 chenlin2018@iet.cn
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