热力发电2023，Vol.52Issue(11)：29-36,8.DOI:10.19666/j.rlfd.202301011
亚临界压力下二氧化碳传热特性及临界热流密度预测模型研究
Study on heat transfer characteristics and critical heat flux prediction model of carbon dioxide under subcritical pressure
摘要
Abstract
The carbon dioxide(CO2)Brayton cycle system is compact,efficient and flexible,and has a good application prospect in the third generation photothermal system and the fourth generation nuclear power system.The deterioration of CO2 heat transfer affects the safe operation of the unit.In order to study the deterioration of CO2 heat transfer in the vertical riser,a CO2 heat transfer characteristic system is established for experimental research,and the CO2 heat transfer characteristics under subcritical and supercritical conditions are compared.The influence of thermal parameters on the deterioration of CO2 heat transfer is obtained,and the prediction correlation of CO2 critical heat flux is established.The predicted value is in good agreement with the experimental value(error ±30％).It is found that the peak value of wall temperature is higher when CO2 heat transfer deteriorates at subcritical pressure.Far away from the critical pressure and increasing the mass flow rate are conducive to restraining the occurrence of heat transfer deterioration.关键词
二氧化碳/传热恶化/临界热流密度/预测关联式Key words
carbon dioxide/heat transfer deterioration/critical heat flux/prediction correlation引用本文复制引用
刘清江,雷贤良,刘吉安..亚临界压力下二氧化碳传热特性及临界热流密度预测模型研究[J].热力发电,2023,52(11):29-36,8.基金项目
国家自然科学基金项目(U1867218) （U1867218）
中国华能集团有限公司能源安全技术专项(HNKJ20-H87-04)National Natural Science Foundation(U1867218) （HNKJ20-H87-04）
Energy Security Technology Project of China Huaneng Group Co.,Ltd.,(HNKJ20-H87-04) （HNKJ20-H87-04）
