Despite the advantages of heating and cooling with a geothermal heat pump system, the initial cost is a most important factor that discourages people. As for vertical boreholes, their main initial cost is drilling. The good way to reduce their depth is to have a good sizing which will fulfil the heating and cooling loads and therefore avoid oversized ground loop heat exchanger.
In this master, a literary review and the principal models are presented. Furthermore, a description of the theories for geothermal systems is given as well as a presentation of well known software that the industries use to size systems like: TRNSYS, GLD, EED, GS2000 and the ASHRAE method.
The model developed by Lamarche and Beauchamp (2007) allow simulations of geothermal wells’ performance. In this master, this model has been optimised and validated with the software mentioned above. It allows a quick estimation of the outlet temperature of the ground loop according to the hourly loads. Besides, the model can measure the ground heat exchanger considering the hourly impact of the heat pump as well as the pump load.
The model is validated and optimised after various simulations with different configurations and loads. The result of the new model is comparable with commercial software. This master also analyzed the effect of the pump and the COP for a geothermal field. For a system where the heating load is dominant, the COP has a major impact on the depth of the geothermal well.
| Date | 7 Jun 2012 |
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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) & Stanislaw Kajl (Co-supervisor) |
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Hudon, P. (Author),
Lamarche (Supervisor) &
Kajl (Co-supervisor),
7 Jun 2012Student thesis: Master's thesis › Master in Engineering: Engineering