Mahmoud Alzoubi - Effect of freeze pipe eccentricity in artificial

Conference proceedings

Ahmad Zueter, Minghan Xu, Mahmoud Alzoubi, Agus Sasmito
ASME International Mechanical Engineering Congress and Ex‐ position (IMECE2020), Virtual Conference, Online, 2020

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APA Click to copy
Zueter, A., Xu, M., Alzoubi, M., & Sasmito, A. (2020). Effect of freeze pipe eccentricity in artificial ground freezing applications. ASME International Mechanical Engineering Congress and Ex‐ position (IMECE2020), Virtual Conference, Online.

Chicago/Turabian Click to copy
Zueter, Ahmad, Minghan Xu, Mahmoud Alzoubi, and Agus Sasmito. Effect of Freeze Pipe Eccentricity in Artificial Ground Freezing Applications. ASME International Mechanical Engineering Congress and Ex‐ position (IMECE2020), Virtual Conference, Online, 2020.

MLA Click to copy
Zueter, Ahmad, et al. Effect of Freeze Pipe Eccentricity in Artificial Ground Freezing Applications. ASME International Mechanical Engineering Congress and Ex‐ position (IMECE2020), Virtual Conference, Online, 2020.

BibTeX Click to copy

@proceedings{ahmad2020a,
  title = {Effect of freeze pipe eccentricity in artificial ground freezing applications},
  year = {2020},
  organization = { ASME International Mechanical Engineering Congress and Ex‐ position (IMECE2020), Virtual Conference, Online},
  author = {Zueter, Ahmad and Xu, Minghan and Alzoubi, Mahmoud and Sasmito, Agus}
}

Abstract

Building concentric tubes is one of biggest practical challenges in the construction of freeze-pipes of artificial ground freezing (AGF) applications for deep underground mines. In this study, the influence of tubes eccentricity on phase-front expansion (i.e., expansion of the frozen body) and energy consumption of AGF systems is analyzed. A 1+1D semi-conjugate model that solves two-phase transient energy conservation equation is derived. The model is firstly validated against experimental data and then verified with a fully-conjugate model from the literature. After that, the model is extended to a field scale of typical deep underground mines to study freeze-pipe eccentricity. The results show that an eccentric freeze pipe can reduce the phase-front expansion by around 25%, as compared with a concentric one. Also, the geometrical profile of the phase-front is significantly influenced by the freeze-pipe eccentricity. Furthermore, in the passive zone, where AGF coolants are isolated from the ground to reduce energy consumption, freeze pipe eccentricity can increase the coolant heat gain by 10%. This percentage can increase up to 200% if radiation heat transfer is minimized.