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During the last years, the interest for ground coupled heat pump (GCHP) and for renewable technologies has grown in the field of single-housold buildings. This work consists above all in creating a realistic environment for a single-family house equipped with PV and GCHP and simulating it with the TRNSYS program during January and February. In addition, this work has two other objectives.
First, the effects of cycling on the heat pump only have been assessed. The results show that promoting longer running times could increase the performances of the heat pump. However, considering the entire system, it seems that extending the minimum running time of the heat pump has no positive effect on the overall performance except reducing the total number of cycles, whose benefits are not measurable.
The second part of this work consists in improving the self-consumption potential of the system by increasing the consumption of PV generated electricity as much as possible. It is done by storing thermal energy into the building and into the buffer storage tank during power generation. The economical perspective is not taken into account. Two simple methods are presented. They both consist in increasing the set point temperatures of the rooms and of the storage tank but differ on the timing. Results show that the two methods could increase the self-consumption (also called supply cover factor) up to 61 % and 70 % respetively while the estimated overall achievable self-consumption is about 95 % (during January and February).

Ingénierie, informatique & technologie > Energie