300MW超临界二氧化碳锅炉气动力特性及壁温分布  

Thermal Fluid Dynamic Characteristics and Wall Temperature Distribution of a 300MW Supercritical CO_2 Boiler

作　　者：张一帆[1] 王安 白文刚[1] 杨玉[1] 李红智[1] 姚明宇[1] 王月明[1] ZHANG Yifan;WANG An;BAI Wengang;YANG Yu;LI Hongzhi;YAO Mingyu;WANG Yueming(Xi’an Thermal Power Research Institute Co.Ltd.,Xi’an 710054,Shaanxi Province,China;Guodian Taizhou Power Generation Co.,Ltd,Taizhou 225321,Jiangsu Province,China)

机构地区：[1]西安热工研究院有限公司,陕西省西安市710054 [2]国电泰州发电有限公司,江苏省泰州市225321

出　　处：《中国电机工程学报》2019年第6期1700-1706,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51706181;51406166);华能集团重点科技项目(HNKJ15-H07);中国电机工程学会青年人才托举工程项目(JCB-2016-70)~~

摘　　要：超临界二氧化碳布雷顿循环有着全流量回热、回热量大的特点,使得其进入热源的工质温度远高于同参数的蒸汽朗肯循环。与以水为工质的传统超临界锅炉相比,超临界二氧化碳锅炉具备入口工质温度高,再热气吸热比例较高,锅侧流体远离大比热区等特点。因此,深入研究超临界二氧化碳锅炉气动力特性(对应水工质锅炉的水动力特性)对煤基超临界二氧化碳发电技术的发展意义重大。以300MW,600℃等级的超临界二氧化碳锅炉为例,通过数值模拟和气动力建模计算相结合的方法,对垂直管圈气冷壁和再热气冷壁的气动力特性进行了详细计算和分析,获得了相应的流量分配规律以及气温和壁温分布特点。One of notable features of supercritical CO2 Brayton cycle is that it needs recover a large amount of exhausted heat for achieving higher cycle efficiency,which makes the inlet temperature of primary heat exchanger(boiler)much higher than that of the conventional steam Rankine cycle.Compared with the supercritical steam boiler,the supercritical CO2 boiler owns remarkable features:higher inlet temperature,higher proportion of the reheat quantity,working far from the large specific heat region.Hence,it is necessary to study the thermal fluid dynamic characteristics and wall temperature distribution of supercritical CO2 boiler in depth.Using a300 MW,600℃once reheat supercritical CO2 boiler as an illustration,the thermal fluid dynamic characteristics were analyzed in detail in the present paper,according to the numerical simulation and hydrodynamic calculation.Then,the distributions of mass flow rate,working fluid temperature and gas wall temperature were obtained.

关 键 词：超临界二氧化碳 布雷顿循环 锅炉 水动力 壁温分布 

分 类 号：TK122[动力工程及工程热物理—工程热物理]