锅炉排烟热损失的精确计算方法研究  

Research on Accurate Calculation Method of Boiler Exhaust Heat Loss

作　　者：杨忠灿[1] 李仁义[1] 李炎[1] 薛朝囡 刘明[2] 严俊杰[2] YANG Zhongcan;LI Renyi;LI Yan;XUE Zhaonan;LIU Ming;YAN Junjie(Xi'an Thermal Power Research Institute Co., Ltd., Xi'an 710032, China;State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049,China)

机构地区：[1]西安热工研究院有限公司,陕西西安710032 [2]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《锅炉技术》2019年第2期6-10,共5页Boiler Technology

基　　金：国家重点研发计划项目(2018YFB0604405)

摘　　要：锅炉排烟热损失是衡量锅炉热经济性的重要指标,其准确计算对锅炉的能效评价具有重要意义。对比了锅炉排烟热损失2种常用算法计算结果,发现计算结果最大相差达0.552 4个百分点,分析获得了计算结果存在差异的原因:2种计算方法的基准温度不同,并且与燃料低位发热量测试的基准温度不统一。为此,通过对燃料的低位发热量进行修正,提出了排烟热损失的精确计算方法。The boiler exhaust heat loss is an important indicator to measure the boiler’s thermal economy, therefore the accurate calculation of its value has important significance to the evaluation of the boiler energy efficiency. Two common calculation methods of boiler exhaust heat loss were compared in this paper. Results show that the maximum difference of boiler exhaust heat loss can be 0.552 4 percent. Reasons are: different reference temperatures are used in these two methods, and the reference temperature for the testing of lower heating value(LHV) is another value. Based on these, a modified method of boiler exhaust heat loss is proposed based on the correction of LHV.

关 键 词：锅炉排烟热损失 低位发热量 基准温度 修正计算方法 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程]