scholarly journals GEOTHERMAL ENERGY PILE-SOIL INTERACTION UNDER MECHANICAL LOADING AND THERMAL CYCLES

2020 ◽  
Vol 18 (70) ◽  
Author(s):  
Alitking Anongphouth
Keyword(s):  
Mechanical Loading ◽  
Geothermal Energy ◽  
Thermal Cycles ◽  
Energy Pile

Technological advances and applications of geothermal energy pile foundations and their feasibility in Australia

2010 ◽  
Vol 14 (9) ◽  
pp. 2683-2696 ◽  
Author(s):  
Monique de Moel ◽  
Peter M. Bach ◽  
Abdelmalek Bouazza ◽  
Rao M. Singh ◽  
JingLiang O. Sun
Keyword(s):  
Geothermal Energy ◽  
Pile Foundations ◽  
Energy Pile ◽  
Technological Advances

scholarly journals Improvement on the Calculation of Heat Transfer Rate for a New Type of Geothermal Energy Pile

IFCEE 2021 ◽  
2021 ◽  
Author(s):  
Yong Zou ◽  
Jie Huang ◽  
Fei Wang ◽  
John S. McCartney ◽  
Elahe Jafari
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Rate ◽  
Geothermal Energy ◽  
Transfer Rate ◽  
Energy Pile ◽  
New Type

On the influence of thermal cycles on the yearly performance of an energy pile

2018 ◽  
Vol 16 ◽  
pp. 32-44 ◽  
Author(s):  
Marianna Adinolfi ◽  
Rosa Maria Stefania Maiorano ◽  
Alessandro Mauro ◽  
Nicola Massarotti ◽  
Stefano Aversa
Keyword(s):  
Thermal Cycles ◽  
Energy Pile

scholarly journals Effect of pile and heat exchanger properties on total heat extraction of an energy pile - A numerical study

2020 ◽  
Vol 205 ◽  
pp. 05024
Author(s):  
Mithun Mandal ◽  
Ramakrishna Bag
Keyword(s):  
Heat Exchanger ◽  
Geothermal Energy ◽  
3D Model ◽  
Total Heat ◽  
Heat Extraction ◽  
Soil Layers ◽  
Energy Pile ◽  
Tube Heat Exchanger ◽  
Concrete Pile ◽  
Inner Diameter

Geothermal energy is one of the potential energy resources to meet future energy demand keeping environmental pollution under control. This paper presents the use of geothermal energy for space heating from energy pile. An energy pile with a single U tube heat exchanger of polyethylene (PE) pipe was modeled in this study. The effect of pile and heat exchanger properties on the total heat extraction was studied by the finite element analysis using COMSOL Multiphysics. The 3D model was developed and validated based on the literature reported results of an experimental thermal performance of a borehole equipped with a single and double U tube heat exchanger. Tetrahedral elements were considered for simulation of a 3D model. The model of a single energy pile of certain dimensions with different soil layers was considered, each soil layers were associated with different temperature. The effect of various parameters such as the length of concrete pile, the diameter of concrete pile, the thickness of U pipe, the inner diameter of U pipe and velocity of fluid inside the U pipe on amount of heat extraction was studied for an energy pile equipped with a single U tube heat exchanger. It was observed that the most influential parameters in increasing the outlet temperature of the heat exchanger loop are the diameter of the concrete pile, the inner diameter of U pipe and the velocity of fluid inside the U pipe.

scholarly journals Parameterization of a calibrated geothermal energy pile model

2016 ◽  
Vol 5 ◽  
pp. 1-15 ◽  
Author(s):  
Robert Caulk ◽  
Ehsan Ghazanfari ◽  
John S. McCartney
Keyword(s):  
Geothermal Energy ◽  
Energy Pile ◽  
Pile Model

scholarly journals Analysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6881
Author(s):  
Lichen Li ◽  
Longlong Dong ◽  
Chunhua Lu ◽  
Wenbing Wu ◽  
Minjie Wen ◽  
...  
Keyword(s):  
Analytical Model ◽  
Load Transfer ◽  
Mechanical Response ◽  
Field Tests ◽  
Pile Group ◽  
Exponential Model ◽  
Heating Process ◽  
Thermal Cycles ◽  
Energy Pile ◽  
The Cost

Energy piles are an emerging energy technology for both structural and thermal purposes. To support structure load, piles are always used in groups with raft; however, the cost and complexity of field tests and numerical modelling limits the research on the bearing characteristics of energy pile group. In this paper, exponential model was applied to simulate the thermo-mechanical soil-pile interaction of energy pile group. Axial load transfer (τ-z) analysis was first performed to calculate the shear stress distribution in the soil, then matrix displacement method was introduced to determine the thermo-mechanical response of energy pile group. The validity of the analytical model was tested against field tests and numerical results. A case study was further performed to analyze the influence of thermal cycles and arrangement of thermally active piles on the bearing response of the whole pile group. Test results show that with the thermally activated pile in pile group, (1) differential settlement increases with thermal cycle numbers; (2) the axial force of thermally active pile increases during heating process and decreases during cooling process, and this trend varies for the surrounding nonthermal piles; (3) induced load on thermal pile increases with thermal cycles, but decreases for nonthermal piles. The proposed analytical model is expected to serve as a simple and convenient alternative for the preliminary analysis on the bearing characteristics of energy group pile.

scholarly journals A review of shallow geothermal energy pile from numerical study

2018 ◽  
Author(s):  
M. M. Nujid ◽  
J. Idrus ◽  
K. A. Hashim ◽  
D. A. Tholibon ◽  
N. S. Azizan
Keyword(s):  
Geothermal Energy ◽  
Numerical Study ◽  
Energy Pile ◽  
Shallow Geothermal Energy
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