沼气工程余热回收设备流动换热特性分析
郭亚丽¹，张媛媛²，罗成²，程远达²
（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）
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421.6～3 898.4 Pa，对
应的传热系数则由915.5 W/(m²·K)增加至2 656.7 W/(m²·K)。
关键词： 沼气工程；余热回收；换热器；模拟优化
中图分类号： TK63     文献标志码： A     文章编号： 2095-0802-(2020)10-0070-04
Analysis on Flow and Heat Transfer Characteristics of Waste Heat Recovery Equipment in
Biogas Project
GUO Yali¹，ZHANG Yuanyuan²，LUO Cheng², CHENG Yuanda²
(1. Municipal Engineering Department of Taiyuan City Vocational and Technical College, Taiyuan 030027, Shanxi, China;
2. School of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China)
Abstract: 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 421.6-3 898.4 Pa, and the corresponding heat transfer coefficient was increased from 915.5 W/(m²·K) to 2 656.7 W/(m²·K).

Key words: biogas project; waste heat recovery; heat exchanger; simulation optimization