Numerical Analysis of the Long-Term Performance of Energy Piles in Sand

2018 ◽  
pp. 57-72
Author(s):  
Kang Fei ◽  
Wei Hong ◽  
Jian Qian
Keyword(s):  
Numerical Analysis ◽  
Energy Piles ◽  
Long Term Performance ◽  
Term Performance

Feasibility study of collective heating and cooling based on foundation pile heat exchangers in Vejle (Denmark)

2020 ◽  
pp. qjegh2020-114
Author(s):  
D. Cerra ◽  
M. Alberdi-Pagola ◽  
T.R. Andersen ◽  
K.W. Tordrup ◽  
S.E. Poulsen
Keyword(s):  
Energy Demand ◽  
District Heating ◽  
Demand Model ◽  
Heating And Cooling ◽  
Energy Piles ◽  
Geophysical Investigations ◽  
Foundation Pile ◽  
Long Term Performance ◽  
Term Performance

We assess the feasibility of a collective district heating and cooling network based on a foundation pile heat exchanger in a new urban area in Vejle, Denmark. A thermogeological model for the area is developed based on geophysical investigations and borehole information. In tandem with a building energy demand model, the subsurface thermal properties serve as the input for a newly developed computational temperature model for collective heating and cooling with energy piles. The purpose of the model is to estimate the long-term performance and maximum liveable area that the energy piles are able to support. We consider two case studies where residential and office buildings dominate the building mass. We find that three to four floors can be supplied with heating and cooling from the energy piles, depending on the use and design of the buildings.

Long-Term Performance and Sustainable Operation of Energy Piles

ICSDEC 2012 ◽  
2012 ◽  
Author(s):  
C. Guney Olgun ◽  
Sherif L. Abdelaziz ◽  
James R. Martin
Keyword(s):  
Sustainable Operation ◽  
Energy Piles ◽  
Long Term Performance ◽  
Term Performance

scholarly journals Long-term performance and life cycle assessment of energy piles in three different climatic conditions

2020 ◽  
Vol 146 ◽  
pp. 1177-1191 ◽  
Author(s):  
Melis Sutman ◽  
Gianluca Speranza ◽  
Alessio Ferrari ◽  
Pyrène Larrey-Lassalle ◽  
Lyesse Laloui
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Climatic Conditions ◽  
Energy Piles ◽  
Long Term Performance ◽  
Term Performance

scholarly journals A Methodology to Evaluate Long Term Durability of Dam Concrete Due to Calcium Leaching through Microscopic Tests and Numerical Analysis

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7819
Author(s):  
Ding Nie ◽  
Haoyu Wang ◽  
Pengfei Li ◽  
Xun Han ◽  
Jingbin Zhang ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Scale Model ◽  
Seepage Water ◽  
Concrete Dams ◽  
Calcium Leaching ◽  
Durability Analysis ◽  
Dam Concrete ◽  
Long Term Performance ◽  
Term Performance

Hydropower dams are subjected to soft water penetration during their service lives. Concrete deterioration due to calcium leaching will decrease the durability of concrete and affect dam safety. The long-term performance of concrete dams due to calcium leaching should be evaluated and predicted accurately to complete reinforcement work in a timely manner. In this paper, a methodology that combined microscopic tests and numerical analysis to evaluate the long-term performance of dam concrete due to calcium leaching is proposed. The current state of concrete is evaluated by analyzing the components of sediments and seepage water through microscopic and spectroscopic tests, such as X-ray photoelectron spectroscopy, scanning electron microscopy, and inductively coupled plasma mass spectrometry. The long-term degradation of concrete was predicted by utilizing a multi-scale model of calcium leaching, which considered the micro-pore structure of cement hydrates flux with time. The simulated results using this calcium leaching model showed a good agreement with other experiments. Finally, a real case study including field inspection was performed and the long-term durability of dam concrete was predicted through microscopic tests and finite element analysis method. It implies that the proposed method could provide calculation and theoretical basis for the durability analysis of concrete dams due to calcium leaching.

Fine Particle Mass Monitoring with Low-Cost Sensors: Corrections and Long-Term Performance Evaluation

2019 ◽  
Author(s):  
Carl Malings ◽  
Rebecca Tanzer ◽  
Aliaksei Hauryliuk ◽  
Provat K. Saha ◽  
Allen L. Robinson ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Fine Particle ◽  
Low Cost ◽  
Particle Mass ◽  
Long Term Performance ◽  
Term Performance

Long-Term Performance after Interventional VSD Closure—Single Center Experience in Pediatric and Adult Patients

2020 ◽  
Author(s):  
C. P. Germann ◽  
M. Bergmann ◽  
J. Nordmeyer ◽  
B. Peters ◽  
F. Berger ◽  
...  
Keyword(s):  
Adult Patients ◽  
Single Center ◽  
Single Center Experience ◽  
Long Term Performance ◽  
Term Performance

Long-term performance of the Hancock bioprosthetic conduit for aortic root replacement

2008 ◽  
Vol 56 (S 1) ◽  
Author(s):  
CC Badiu ◽  
W Eichinger ◽  
D Ruzicka ◽  
I Hettich ◽  
S Bleiziffer ◽  
...  
Keyword(s):  
Aortic Root ◽  
Aortic Root Replacement ◽  
Long Term Performance ◽  
Term Performance
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