The Canadian well, also known as Provencal, is a technique that allows the house to be kept cooler in the summer, and warmer in the winter, using geothermal energy.
The Canadian wells , also known as provencal for its use in the French region of Provence, are geothermal air conditioning systems. This means that they do not consume electrical energy , but are made up of pipe networks located in the exterior subsoil of the houses and use thermal inertia to adjust the temperature inside the houses .
AN ECONOMIC AND SUSTAINABLE TECHNOLOGY
Its principle of operation is very simple: the air that accumulates in the pipes is colder than the air in the house in the summer, but warmer in the winter. Thus, without any electrical consumption, a heat exchange is achieved that will serve to heat the house in winter and cool it in summer.
HOW IS THE TEMPERATURE MAINTAINED INSIDE THE HOUSES?
During the day, the walls heat up, while at night they give in to the heat inside. In summer they absorb heat through a ventilation system and cool down with a similar system at night.
Air circulates through the tubes placed underground, causing a heat exchange between the circulating air and the surrounding earth. Therefore, before installing the pipes, it is essential to study the soil to know what its thermal conductivity is. That is, with this study, it will be possible to know if the soil has the adequate characteristics for the installation of a Canadian well.
HOW THEY WORK IN WINTER
During winter, although the air outside is cold, the temperature at two meters depth is greater than the surface temperature. So when cold outside air circulates through underground pipes, it heats up. Thus, the air is heated as it passes through the pipes until it reaches the interior of the house with a higher temperature.
HOW THEY WORK IN SUMMER
In contrast, during the hot months, the air temperature is higher than the temperature underground . Therefore, when the air passes through the pipes, it gives heat to the earth and cools, reaching the home several degrees less.