Geothermal – Saint-Hippolyte

Operation of a geothermal system

Geothermal systems take advantage of ambient temperature a few meters below the ground surface, an average of 10 degrees Celsius in Quebec. Thus, in summer, the heat pump extracts the hot air from the house, transfers the heat to the ground and then turns the cooled air into the house, while in winter, the heat pump extracts the heat stored in the ground and moves it into the house.
Here are the three elements of a geothermal system: a heat pump, an underground circuit in which a liquid circulates that heats or cools and a distribution system that ensures the circulation of heat or coolness throughout the house.

Thermopomp

The heat pump is coupled to the distribution system to ensure the transfer of heat between the underground circuit and the house. Thus, in winter, it concentrates the heat that this circuit picks up to transmit it to the house, while, in summer, it captures the heat of the house, sends it into the underground circuit and diffuses the air cooled into the house to air-condition it.

Closed circuit

In a closed circuit, a liquid (mixture of antifreeze and water) circulates in the underground loop and in the heat pump.

Direct restraint

Designed in Canada, the direct detent circuit is suitable for existing houses. It is suitable for small spaces, for example in urban areas, because it does not require deep drilling and can be set up with a very compact drill. A direct expansion system circulates a refrigerant in copper pipes buried about 30 metres in the ground.
Amount of financial assistance
Hydro-Québec, together with the LogisVert programme, offers a grant of 750 euros per 1,000 BTU/h for the sale and installation of a geothermal heat pump when all the requirements of the Programme are met.