A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Comparing heat flow models for interpretation of precast quadratic pile heat exchanger thermal response tests
This paper investigates the applicability of currently available analytical, empirical and numerical heat flow models for interpreting thermal response tests (TRT) of quadratic cross section precast pile heat exchangers. A 3D finite element model (FEM) is utilised for interpreting five TRTs by inverse modelling. The calibrated estimates of soil and concrete thermal conductivity are consistent with independent laboratory measurements. Due to the computational cost of inverting the 3D model, simpler models are utilised in additional calibrations. Interpretations based on semi-empirical pile G-functions yield soil thermal conductivity estimates statistically similar to those obtained from the 3D FEM inverse modelling, given minimum testing times of 60 h. Reliable estimates of pile thermal resistance can only be obtained from type curves computed with 3D FEM models. This study highlights the potential of applying TRTs for sizing quadratic, precast pile heat exchanger foundations.
Comparing heat flow models for interpretation of precast quadratic pile heat exchanger thermal response tests
This paper investigates the applicability of currently available analytical, empirical and numerical heat flow models for interpreting thermal response tests (TRT) of quadratic cross section precast pile heat exchangers. A 3D finite element model (FEM) is utilised for interpreting five TRTs by inverse modelling. The calibrated estimates of soil and concrete thermal conductivity are consistent with independent laboratory measurements. Due to the computational cost of inverting the 3D model, simpler models are utilised in additional calibrations. Interpretations based on semi-empirical pile G-functions yield soil thermal conductivity estimates statistically similar to those obtained from the 3D FEM inverse modelling, given minimum testing times of 60 h. Reliable estimates of pile thermal resistance can only be obtained from type curves computed with 3D FEM models. This study highlights the potential of applying TRTs for sizing quadratic, precast pile heat exchanger foundations.
Comparing heat flow models for interpretation of precast quadratic pile heat exchanger thermal response tests
Alberdi-Pagola, Maria (author) / Poulsen, Søren Erbs (author) / Loveridge, Fleur (author) / Madsen, Søren (author) / Jensen, Rasmus Lund (author)
2018-01-01
Alberdi-Pagola , M , Poulsen , S E , Loveridge , F , Madsen , S & Jensen , R L 2018 , ' Comparing heat flow models for interpretation of precast quadratic pile heat exchanger thermal response tests ' , Energy , vol. 145 , pp. 721-733 . https://doi.org/10.1016/j.energy.2017.12.104
Article (Journal)
Electronic Resource
English
HEAT EXCHANGER DEVICE USING PRECAST PILE AND PRECAST PILE WITH HEAT EXCHANGING PIPES
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Thermal response test data of five quadratic cross section precast pile heat exchangers
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Method to obtain g-functions for multiple precast quadratic pile heat exchangers
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