Intelligent adjustment ventilation duct design and numerical simulation study on enhancement of subgrade thermal stability in cold regions

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2024-11-16 DOI:10.1016/j.csite.2024.105502

Zhijun Zhao, Yongtao Wang, Aiting Sang, Xiangtian Xu, Lingxiao Fan, Wenbin Huang, Yuhang Liu

{"title":"Intelligent adjustment ventilation duct design and numerical simulation study on enhancement of subgrade thermal stability in cold regions","authors":"Zhijun Zhao, Yongtao Wang, Aiting Sang, Xiangtian Xu, Lingxiao Fan, Wenbin Huang, Yuhang Liu","doi":"10.1016/j.csite.2024.105502","DOIUrl":null,"url":null,"abstract":"Traditional ventilation duct systems for embankments in cold regions are limited in their ability to regulate ventilation, which restricts their cooling effectiveness on the subgrade. This study introduces a design method for an Intelligent Adjustment Ventilation Embankment (IAVE) system that dynamically adjusts the ventilation status within the duct based on variations in ground and air temperatures. Numerical simulations were performed to compare the cooling performance and differential settlement control of the Normal Ventilation Embankment (NVE), Temperature-Controlled Ventilation Embankment (TCVE), and IAVE systems. The results demonstrated that, compared to NVE and TCVE, the IAVE system achieved more precise temperature regulation, optimized the use of environmental cooling energy, and exhibited superior long-term cooling and differential settlement control. Among the three main factors influencing IAVE performance—ventilation duct burial spacing, burial depth, and airflow velocity—the burial spacing has the most significant impact on the Artificial Permafrost Table (APT). It not only enhances cooling during cold seasons but also effectively mitigates the re-warming of the subgrade during warm seasons. This research offers an efficient, low-carbon energy utilization structure and provides calculation results to improve the thermal stability of engineering projects in cold regions.","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"179 1","pages":""},"PeriodicalIF":6.4000,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Case Studies in Thermal Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.csite.2024.105502","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"THERMODYNAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

Traditional ventilation duct systems for embankments in cold regions are limited in their ability to regulate ventilation, which restricts their cooling effectiveness on the subgrade. This study introduces a design method for an Intelligent Adjustment Ventilation Embankment (IAVE) system that dynamically adjusts the ventilation status within the duct based on variations in ground and air temperatures. Numerical simulations were performed to compare the cooling performance and differential settlement control of the Normal Ventilation Embankment (NVE), Temperature-Controlled Ventilation Embankment (TCVE), and IAVE systems. The results demonstrated that, compared to NVE and TCVE, the IAVE system achieved more precise temperature regulation, optimized the use of environmental cooling energy, and exhibited superior long-term cooling and differential settlement control. Among the three main factors influencing IAVE performance—ventilation duct burial spacing, burial depth, and airflow velocity—the burial spacing has the most significant impact on the Artificial Permafrost Table (APT). It not only enhances cooling during cold seasons but also effectively mitigates the re-warming of the subgrade during warm seasons. This research offers an efficient, low-carbon energy utilization structure and provides calculation results to improve the thermal stability of engineering projects in cold regions.

查看原文本刊更多论文

提高寒冷地区基层热稳定性的智能调节通风管道设计与数值模拟研究

传统的寒冷地区堤坝通风管道系统调节通风的能力有限，从而限制了其对基层的冷却效果。本研究介绍了一种智能调节通风堤坝（IAVE）系统的设计方法，该系统可根据地面和空气温度的变化动态调节管道内的通风状态。数值模拟比较了普通通风堤（NVE）、温控通风堤（TCVE）和 IAVE 系统的冷却性能和差异沉降控制。结果表明，与 NVE 和 TCVE 相比，IAVE 系统实现了更精确的温度调节，优化了环境冷能的使用，并表现出更优越的长期降温和差异沉降控制能力。在影响 IAVE 性能的三个主要因素（通风管道埋设间距、埋设深度和气流速度）中，埋设间距对人工冻土表（APT）的影响最为显著。它不仅能在寒冷季节提高降温效果，还能在温暖季节有效缓解地基回暖。这项研究提供了一种高效、低碳的能源利用结构，并为提高寒冷地区工程项目的热稳定性提供了计算结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.