流体机械2025，Vol.53Issue(3)：52-60,103,10.DOI:10.3969/j.issn.1005-0329.2025.03.007
空气源热泵翅片管换热器积灰特性研究
Investigation into ash deposition characteristics on finned tube heat exchangers used in air source heat pumps
摘要
Abstract
To address the issue of rising energy consumption and decreased efficiency in air source heat pumps caused by outdoor heat exchanger fouling,taking finned tube heat exchanger as the research object,this study utilized Fluent computational fluid dynamics software to investigate particulate matter deposition on a finned tube heat exchanger with six rows of tubes.SST k-ω model was adopted.The research deposition patterns of particulate matter with varying sizes on heat exchanger surfaces.At the same time,an experimental setup dedicated to ash deposition is constructed with the objective of validating numerical simulation outcomes.The CCD industrial camera is used to capture the image of the fin surface during the ash deposition process.Subsequently,the captured images and generated data underwent meticulous processing and analysis utilizing MATLAB software.Based on the conclusion drawn,the particle deposition distribution on the surface of the heat exchange tube primarily occurs within the±75°area,constituting 94%of the total deposition.On the back of the heat exchange tube,the deposition ratio is only 2%with the±(160～180)°area.At low wind speed,the mass of particle deposition on the heat exchanger surface decreases as wind speed increases.When the wind speed reaches 1.5 m/s,the deposition quality begins to rise.The findings reveales a distinct pattern in the ash deposition process:The mixed particles exhibit a synergistic effect on the fouling of the heat exchanger.The maximum deposition mass on the heat exchanger surface and the resulting pressure drop and fouling coefficient are higher than those of single particle size particles.The research results can provide reference for the maintenance and optimization of air source heat pump system in practical application.关键词
翅片管换热器/积灰/数值模拟/脏堵系数Key words
finned tube heat exchanger/ash accumulation/numerical simulation/fouling factor分类
能源与动力引用本文复制引用
赵勇,马广兴,常琛,何怡,苑文燕,霍思源..空气源热泵翅片管换热器积灰特性研究[J].流体机械,2025,53(3):52-60,103,10.基金项目
内蒙古自然科学基金项目(2021MS05032) （2021MS05032）
