Behavior of closely spaced double-pile-supported jacket foundations for offshore wind energy …
The simulation results for two systems consist of jacket supported single piles with an embedded length of L=25 m (12.5D) and jacket with closely-spaced double piles with an embedded length( L ...
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(PDF) A Review on Performance of Energy Piles and Effects on …
General aspects on the performance of energy piles and their impact on the surrounding ground are presented based on previous ... single, double or triple U-shaped pipes and W-shaped pi-pes (Fig ...
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Investigation of microencapsulate phase change material-based energy pile group: Energy …
Recently, energy storage piles utilizing phase change material (PCM) to enhance equivalent heat capacity have become an emerging topic in this field due to their demonstrated ability to increase energy efficiency (Han and Yu, 2018; Mousa et …
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Thermo-mechanical coupling characteristics of single energy pile …
In order to study the thermo-mechanical characteristics of energy piles and their effects on the other parts of pile foundation, field tests on the thermal response of a 2×2 pile-cap …
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This paper investigates the behavior of a single energy pile with three different mechanical head loads (65, 115, and 185 N) and also the effect of pile temperature on its bearing capacity by conducting 1g physical model tests. Thermal loading is comprised of...
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A Review on Energy Piles Design, Evaluation, and Optimization
In these cost-effective systems, heat is exchanged between the pile and the soil due to the relatively constant temperature several meters deep in the ground (colder than ambient during winters ...
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A simplified nonlinear approach for single pile settlement analysis
A simple analytical approach for nonlinear analysis of the load–displacement response of a single pile is presented. Two models are adopted in the proposed approach. One model uses a softening nonlinear relationship to simulate the degradation behavior between the unit skin friction and the pile–soil relative displacement …
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A review on energy piles design, sizing and modelling
Heat exchange loop in the pile can be installed as – single U-tube, double U-tube, multi U-tube, W-tube, also as coil with known pitch and as indirect double-pipe, see Fig. 5. Amount of U-loops in large diameter energy piles may commonly exceed two.
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Study on heat transfer characteristics and pile group influence of ...
Under the condition of pile group condition, the heat transfer enhanced effect of energy piles are affected by the location and the space, the corner pile is the most effective, the edge pile is ...
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Buildings | Free Full-Text | Effects of Staggered Plates on the
Plate position is an important parameter of a New Type Concrete Expanded-Plate (NT-CEP) pile. In this study, two small-scale test models and two, four, six, and nine finite element models were established using a visual small-scale model of half-section piles, an undisturbed soil pull-out test, and the ANSYS finite element software R19.0. The …
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Study of thermal migration and induced mechanical effects in double U-tube energy piles …
The heating loads can increase the bearing capacity of energy piles ranging from 13% to 16.4% [53] [54] [51], but the cooling loads decrease it by 8.7% according to Wang et al. [54]. Thermally ...
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Group Performance of Energy Piles under Cyclic and Variable …
Energy piles, a new type of heat exchanger that serves dual purposes, have gained increasing attention due to the growing energy demand and corresponding …
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Thermomechanical performance analysis of MicroPCM-enhanced energy pile …
Energy piles represent one of the cutting-edge green underground engineering techniques, wherein heat exchanger systems are integrated into concrete foundational piles of buildings. This configuration facilitates a heat exchange with the neighboring soil, effectively supporting the load-bearing capacity of the piles and …
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Underground solar energy storage via energy piles: An …
As illustrated in Fig. 2 (a), the test set-up consists of four major components: the energy pile-soil system for heat storage, the flat-plate solar collector with lighting system for heat collection, the cooling units for heat extraction, and the circulation pipe with pumps and control valves.The aluminium cylindrical soil container with a wall …
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Dyness Knowledge | The integration of storage and charging
The vehicle-to-pile ratio has dropped to 2.6:1, and there is still room for development to achieve a lower vehicle-to-pile ratio. Integration of storage and charging: a new direction leading the ...
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Underground solar energy storage via energy piles
There are two main different features of the energy pile-solar collector coupled system compared to the traditional borehole system for underground thermal …
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Thermomechanical Behavior of Energy Piles and Interactions within Energy Pile–Raft Foundations | Journal of Geotechnical and Geoenvironmental ...
Energy pile groups generally show different behavior than single energy piles because of the presence of rafts and the thermomechanical interaction between piles. This paper presents the results from a series of full-scale field tests to investigate the thermomechanical behavior of an energy pile–raft foundation.
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Uplift capacity of single piles: Predictions and performance
The study discovered that the capacity of single piles with circle cross-section area under pull-out force increasing by 211% and 458% with the increasing of pile diameter (width) from 3cm to 4cm ...
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Advances in ground heat exchangers for space heating and …
Peng et al. [99] conducted a model experiment in which the same thermal load was applied to both single pile and energy pile groups. The research showed that the pile body lateral friction resistance and axial force of the PGHE group were smaller than those of the single PGHE, but the pile top displacement in the pile group was larger than …
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Simulation and Analysis of the Thermal-Mechanical …
In this paper, the temperature distribution of a single energy pile and the soil around the pile is studied, in addition to the thermal response of the pile after stable heat exchange of the parallel double U …
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Underground solar energy storage via energy piles: An …
Energy storage needs to account for the intermittence of solar radiation if solar energy is to be used to answer the heat demands of buildings. Energy piles, which …
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Multi-objective optimization and evaluation of the building-integrated photovoltaic/thermal-energy pile …
As carbon emissions and the cost of the energy pile are not considered in Case 1 and the operation consumption of the heat pump unit takes a dominant proportion in the TPC (Section 3.1.2), this strategy suggests that maximizing the number of energy piles
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Single Piles and Pile Groups Under Lateral Loading
Three-dimensional finite element models of the pile–soil interaction systems, which include nonlinearities of soil and concrete piles as well as coupling interactions between the piles and soil ...
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Performance of a full-scale energy pile for underground solar energy storage …
Request PDF | Performance of a full-scale energy pile for underground solar energy storage ... and the total amount of the thermal energy stored by a single energy pile was −3.2 GJ over 29.5 days.
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Response of energy pile-soil structure and pile group effect: An …
In addition, the energy pile with double U shape GHE and 1% wt. microPCM addition is identified as the optimal design in the study, which contributes to 6–49% more energy extraction with a ...
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Energy Storage Charging Pile Management Based on Internet of …
The new energy storage charging pile system for EV is mainly composed of two parts: a power regulation system [43] and a charge and discharge control system. The power regulation system is the ...
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Behavior of closely spaced double-pile-supported jacket foundations for offshore wind energy …
Rotations of the closely spaced double-pile jacket were apparently less than those of the single-pile-supported jacket with the increase of the moment, especially for foundations with pile lengths L = 8 D, 10 D, 12.5 …
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Numerical investigation of the mechanical behaviour of single energy piles and energy pile …
These geothermal piles supply the energy needed for 20% of heating and 100% of cooling of the building [41]. In addition, in many other projects such as Norddeutsche Landesbank [42], the School ...
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(PDF) ENERGY PILES: CHALLENGES AND OPPORTUNITIES
Energy piles are a type of green foundations that can reduce the amount of energy consumed for space heating and cooling by up to 75%. It is inevitable …
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Single Piles and Pile Groups Under Lateral Loading | Request …
Request PDF | On Dec 15, 2010, Lymon C. Reese and others published Single Piles and Pile Groups Under Lateral Loading | Find, read and cite all the research you need on ResearchGateThe ...
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(PDF) Energy piles: Current state of knowledge and design challenges …
Energy piles offer a promising and eco-friendly technique to heat or cool buildings. Energy piles can be exploited as ground heat exchangers of a ground source heat pump system. Comparison between ...
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(PDF) Energy and geotechnical behaviour of energy piles for …
Maximum pile settlements dzth ¼ 0.28, 0.47 and 0.46 mm were observed for the energy pile equipped with the single U, double U, and W-shaped pipe configurations, respectively. The null point, which represents the plane where zero thermally induced displacement occurs in the foundation [69], was close to the bottom of the energy pile for …
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Finite cylinder-source model for energy pile heat exchangers: Effect of buried depth …
However, an analysis by the mean FCS method is highly desirable to account for thermal capacity of a single energy pile itself. The influence of the distance D is beyond the scope of infinite cylindrical heat source (CHS) [10], [12], [27], so-called "hollow" cylinder-source, or infinite two composite-medium line-source models [28] .
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Feasibility of vibration mitigation in unsaturated soil by periodic pile …
Study on the optimal vibration isolation design and effect of composite multilayer wave impeding block in unsaturated soil. Abstract Based on the mixed theory of three-phase porous medium, the vibration isolation effect of composite multilayer wave impeding block in unsaturated soil is investigated. Using the Fourier….
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Energies | Free Full-Text | Thermal Performance of an Energy Pile …
The thermal performance of the pile group is compared with that of a single pile to investigate the effects of the pile group on the heat transfer. ... a nonenergy pile can be set up at the middle of two adjacent energy piles to double the pile spacing between energy piles and increase the heat transfer capacity of every energy pile, and …
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Analysis of Influencing Factors on Bearing Characteristics
Figure 4 shows the influence of the number of piles on the change in pile top displacement under the temperature-load combined action. It can be seen from Fig. 4 that at the initial time, the pile top displacement of the single pile and pile group is negative because the effect of temperature has not been played at the initial time, and the pile …
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Analytical solutions for thermal–mechanical coupling of energy piles in double …
Section snippets Governing laws and assumptions An analytical model of an energy pile in double-layered soil is presented in Fig. 1. The restraining effects of the surrounding soil on the pile are represented by tangential springs with stiffness values of k s1 and k s2, while the constraints at the pile head and bottom are represented by normal …
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Thermomechanical Behavior of Energy Piles and Interactions …
Energy pile groups generally show different behavior than single energy piles because of the presence of rafts and the thermomechanical interaction between …
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A review on energy piles design, sizing and modelling
Summaries of literature review in categories of energy piles modelling and sizing are presented in Sections 4 Energy pile modelling, 5 Energy pile sizing and design, respectively. 2. Fundamental schemes of plants with energy piles. Fundamental schemes of geothermal plants presented in this section support various types of ground heat …
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A Review on Energy Piles Design, Evaluation, and Optimization
address the optimization aspects of energy piles under thermo-mechanical interactions. This paper presents a comprehensive review of all energy piles'' features: evaluation, …
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