The analytical method is considered as a relevant and convenient method for modeling geothermal exchangers. It is an alternative to numerical calculations, which seem to be very complex and costly in time and resources. Regarding vertical geothermal systems, several models exist and are suitable for any geometry that the pipe could take (helix, spiral, straight, etc.).
However, the interest in the theoretical study of horizontal geothermal systems is less important, and so little research works exist in the literature on this type of system. Generally, they carry on modeling some fairly simple form of pipes, through experimental tests or numerical simulations.
The response of the helical heat source is determined using the method of Green adapted to our geometry and depending on the thermal characteristics of the geothermal domain.
It is in this context that this research, entitled “Development of new analytical solution to modeling horizontal ground heat exchanger with helical coils”, has been conducted.
Once the mathematical model is developed, a validation phase was conducted by comparing the results with those given by the numerical solution, made using Comsol software based on finite element method.
Simulations on a one-year period were performed with thermal solicitations of heating and cooling, while considering seasonal effect of temperature on the surface of soil. The error range determined from the results of both models does not exceed 1,8°C, concluding the validity of this new analytical solution for horizontal helical exchanger geothermal system.
| Date | 8 Sept 2016 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Louis Lamarche (Supervisor) |
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Dalhoum, A. (Author),
Lamarche (Supervisor),
8 Sept 2016Student thesis: Master's thesis › Master in Engineering: Engineering