沼气工程余热回收设备流动换热特性分析  

Analysis on Flow and Heat Transfer Characteristics of Waste Heat Recovery Equipment in Biogas Project

作　　者：郭亚丽[1] 张媛媛 罗成 程远达 GUO Yali;ZHANG Yuanyuan;LUO Cheng;CHENG Yuanda(Municipal Engineering Department of Taiyuan City Vocational and Technical College,Taiyuan 030027,Shanxi,China;School of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China)

机构地区：[1]太原城市职业技术学院市政工程专业,山西太原030027 [2]太原理工大学土木工程学院,山西太原030024

出　　处：《能源与节能》2020年第10期70-73,共4页Energy and Energy Conservation

基　　金：山西省重点研发计划项目(201803D121105)。

摘　　要：针对沼气工程余热回收的需求,结合沼液的流动特性,提出了一种新型内嵌百叶管壳式换热器。采用数值模拟的方法,对换热器壳侧和管侧的流动与换热特性进行了模拟研究,并从换热性能提升的角度,对管侧的管径与入口流速进行了优化。结果表明,当壳程入口流速变化范围为0.5~1.5 m/s时,内嵌百叶板换热器壳程压降为421.6~3898.4 Pa,对应的传热系数则由915.5 W/(m^2·K)增加至2656.7 W/(m^2·K)。This paper proposed a new type of in-line louvered shell-and-tube heat exchanger to meet the needs of biogas project waste heat recovery combined with the flow characteristics of biogas slurry.Using the method of numerical simulation,the flow and heat transfer characteristics of the shell and tube sides of the heat exchanger was simulated.The tube diameter and inlet flow velocity were optimized from the perspective of improving heat transfer performance.The results showed that when the shell-side inlet flow velocity varied from 0.5 m/s to 1.5 m/s,the shell side pressure drop of the heat exchanger with embedded louver plate was 421.6-3898.4 Pa,and the corresponding heat transfer coefficient was increased from 915.5 W/(m^2·K)to 2656.7 W/(m^2·K).

关 键 词：沼气工程 余热回收 换热器 模拟优化 

分 类 号：TK63[动力工程及工程热物理—生物能]