Question 1

What is collector fluid / brine?

Accepted Answer

Collector fluid (brine) is the liquid that circulates in the energy collector and transfers heat from the bedrock to the heat pump. Common options include ethanol mixtures, propylene glycol or non-flammable products such as Kilfrost GEO.

Question 2

What do I need to calculate the brine volume?

Accepted Answer

You need the collector's outer diameter, SDR class, borehole depth, number of boreholes and collector type (2x = single U-pipe, 4x = double U-pipe).

Question 3

What is the difference between single (2x) and double (4x) U-pipe?

Accepted Answer

Single U-pipe (2x) means one collector loop per borehole; double U-pipe (4x) means two. Double gives better heat transfer but requires more brine.

Question 4

Why choose Kilfrost GEO instead of ethanol?

Accepted Answer

Kilfrost GEO is non-flammable, non-toxic and forms turbulent flow at lower flow rates, improving the system's energy efficiency.

Question 5

How do I know what concentration the brine should be?

Accepted Answer

The concentration depends on the lowest expected temperature in the system. Contact MuoviTech and we will help you choose the right concentration and product.

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