基于FLUENT小型生物质锅炉换热器分析与研究  

Analysis and Research on Heat Exchange of Small Biomass Boiler Based on Fluent

作　　者：朱永隆 王海[1,2,3] ZHU Yonglong;WANG Hai(School of Mechanical Engineering,Anhui Polytechnic University,Wuhu 241000,China;Anhui Province Key Laboratory of Advanced Numerical Control&Servo Technology,Wuhu 241000,China;Anhui Province Technology Innovation Center of Special Display and Imaging Technology,Wuhu 241000,China)

机构地区：[1]安徽工程大学机械工程学院,安徽芜湖241000 [2]先进数控和伺服驱动安徽省重点实验室,安徽芜湖241000 [3]特种显示与成像技术安徽省技术创新中心,安徽芜湖241000

出　　处：《安徽科技学院学报》2022年第1期86-95,共10页Journal of Anhui Science and Technology University

基　　金：安徽省高校优秀青年骨干人才国外访学研修项目(gxgwfx2021035);安徽工程大学创新团队项目;特种显示与成像技术安徽省技术创新中心开放性课题(2020AJ06001)。

摘　　要：目的:探究小型生物质锅炉气相燃烧室燃烧过程中的换热特性,改善现阶段我国北方供暖存在的诸多问题,减少对于燃煤锅炉的使用,实现碳中和和碳达峰的目标。方法:建立小型生物质锅炉换热系统模型,针对于现有的生物质锅炉中的气相燃烧室的排气管出口温度较高、换热效率低下等问题,利用SolidWorks设计两种螺旋管换热器模型,利用传热学原理以及流体力学流动与传热方程,对于其气相燃烧室进行数值仿真。结果:通过对比分析表明,基于ANSYS-Fluent分析下沿锥度扩张的螺旋管换热器的综合换热性能比普通螺旋管换热器换热性能较好,排气管口的出口温度有明显降低。结论:相同参数情况下,沿锥度扩张的螺旋管换热器1 h换热量可达到25 392.97 kJ,相比于普通螺旋管换热器,综合换热量提高了近53.29%。Objective:To investigate the heat transfer characteristics of small biomass boilers during the combustion process in the gas phase combustion chamber,in order to improve the many problems that exist at this stage of China’s northern heating,to reduce the use of coal-fired boilers,and to achieve the goal of carbon neutrality and carbon peaking.Methods:A model of the heat transfer system of a small biomass boiler was established,and for the problems of high exit temperature and low heat transfer efficiency of the exhaust pipe of the gas phase combustion chamber in the existing biomass boiler,two spiral tube heat exchanger models were designed using SolidWorks,and numerical simulations of the gas phase combustion chamber were carried out using the principles of heat transfer and the flow and heat transfer equations of fluid mechanics.Results:The comparative analysis shows that the comprehensive heat transfer performance of the spiral tube heat exchanger expanding along the taper based on ANSYS fluent analysis is better than that of the ordinary spiral tube heat exchanger,and the outlet temperature of the exhaust pipe orifice is significantly reduced.Conclusion:Under the same parameters,the heat transfer performance of the spiral tube heat exchanger with expansion along the taper is better,and the 1 h heat transfer can reach 25 392.97 kJ,which is nearly 53.29% higher than that of the common spiral tube heat exchanger.

关 键 词：换热管 结构优化 数值模拟 参数优化 出口温度 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]