Heat Transfer Analysis in Thermal Engineering

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Energy Systems".

Deadline for manuscript submissions: closed (25 June 2023) | Viewed by 1866

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Department of Mechanical and Electro-Mechanical Engineering, Tamkang University, Tamsui Dist., New Taipei City 251301, Taiwan
Interests: heat pipes; heat exchangers; thermo-fluids; thermal management; additive manufacturing
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Special Issue Information

Thermal engineering is a specialized discipline that deals with the movement and transfer of heat energy. Industrial thermal systems include automotive engines, jet engines, rockets, power plants, refrigeration and air-conditioning plants, refineries, chemical processing plants, food processing and preservation units, and manufacturing industries. Heat transfer plays a critical role in improving the efficiency of these thermal systems, and its analysis through various novel approaches helps in identifying losses so as to mitigate them with appropriate thermal enhancement techniques. This Special Issue on “Heat Transfer Analysis in Thermal Engineering” is open for original research articles that use experimental, theoretical, or computational approaches to analyze and solve thermal engineering problems. Review articles about the latest developments and research efforts in this field are also welcome. The topics of interest will include, but are not limited to:

  • Heat transfer and thermal power;
  • Thermal science and energy systems;
  • Thermal system design;
  • Thermodynamics and combustion engineering;
  • Refrigeration and air conditioning;
  • Thermal turbomachines;
  • Heat exchangers and heat pipes;
  • Space vehicle heat transfer;
  • Combustion chamber heat transfer;
  • Multi-phase heat transfer systems;
  • Battery cooling systems;
  • Electronic cooling systems;
  • Heat energy conversion and recovery;
  • Solar thermal systems;
  • Thermal enhancement techniques.

Prof. Shung-Wen Kang
Guest Editor

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Keywords

  • heat transfer analysis
  • thermal engineering
  • heat energy system
  • thermo-fluids
  • heat energy conversion
  • electronic cooling
  • HVAC systems
  • space vehicles
  • heat exchangers
  • heat pipes
  • computational, experimental, and theoretical analysis

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Published Papers (1 paper)

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Research

17 pages, 3407 KiB  
Article
Temporal and Spatial Evolution Law of the Freezing Temperature Field of Water-Rich Sandy Soil under Groundwater Seepage: A Case Study
by Wei Long, Chuanxin Rong, Hao Shi, Shiqing Huang, Bin Wang, Yin Duan, Zhi Wang, Xin Shi and Haochen Ma
Processes 2022, 10(11), 2307; https://doi.org/10.3390/pr10112307 - 6 Nov 2022
Cited by 3 | Viewed by 1408
Abstract
We aimed to assess the temporal and spatial evolution law of the freezing temperature field of water-rich sandy soil in underground freezing engineering, taking the newly built west ventilating shaft freezing engineering in the Yuandian No. 2 Mine of Huaibei Coalfield as the [...] Read more.
We aimed to assess the temporal and spatial evolution law of the freezing temperature field of water-rich sandy soil in underground freezing engineering, taking the newly built west ventilating shaft freezing engineering in the Yuandian No. 2 Mine of Huaibei Coalfield as the engineering background. The influence of groundwater seepage on the freezing temperature field was qualitatively analyzed using field measured data. Based on the mixture medium theory, a hydrothermal coupling numerical calculation model of the freezing temperature field was established. The temporal and spatial evolution law of the freezing temperature field of water-rich sandy soil was obtained via the analysis of field measured data and numerical calculation results. It was found that the proportion of water that froze into ice in the soil mass within the freezing pipe circle is more than that outside of the freezing pipe circle; thus, the phase change in the soil mass within the freezing pipe circle is highly obvious. Groundwater seepage has an “erosion” effect on the upstream and side frozen walls and a “cooling superposition” effect on the downstream frozen wall. Under the effect of groundwater seepage of 2.81 m/d, the average temperature of the effective frozen wall during excavation is below −15 °C, while the thickness is above 5 m for the selected sandy layer at the site, meeting the construction and design requirements. When the groundwater flow rate increases from 0 to 10 m/d, the closure time of the frozen wall increases from 27 to 49 days, an 81.48% increase; the upstream thickness of the effective frozen wall decreases from 5.635 to 4.65 m, which represents a 17.48% decrease, while the downstream thickness increases from 5.664 to 7.393 m, an increase of 30.60%. The numerical calculation model in this paper can be used to predict the development law of the freezing temperature field of the water-rich sandy layers in the Yuandian No. 2 mine and to adjust the on-site cooling plan in real time according to the construction progress. This study provides some theoretical basis and reference for the construction and designs of the freezing temperature fields of water-rich sandy soil layers. Full article
(This article belongs to the Special Issue Heat Transfer Analysis in Thermal Engineering)
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