The collector


Performance

Thanks to its innovative design, the Thermex collector is about 70% more efficient than conventional collectors when it comes to extracting energy from the ground.
Performance in an energy collector is measured by the temperature difference between the borehole wall and the fluid circulating in the collector. The better the collector, the lesser is the difference in temperatur between the ground and the circulating fluid.

When using the Thermex collector, the temperature difference between ground and fluid is 2 to 5 degrees less than in conventional collectors, which substanially improves the performance of the system.

Design

The Thermex collector is comprised of an "outer sleeve" and an isolated center pipe that is inserted into the borehole after the outer sleeve has been filled with water. After extraction of the heat from the surrounding ground the fluid is taken up to the heat pump via the center pipe. The direction of the flow can be reversed if needed.
The "outer sleeve" of the Thermex collector is first inserted into the borehole. A weight is used to simplify installation. The sleeve sealed tight at the bottom and it is manufactured from a durable material ensuring that it is not damaged during installation or operation. Once the sleeve has been inserted it is filled with water making it push tight against the wall of the borehole.

A double center pipe is then inserted into the hole. The air-filled space between the two center pipes acts as isolation enabling optimal heat exchange with the ground, without thermal shunt flow.

At ground level a special lid is used where the supply and return pipes penetrate and connect to the header pipes.
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