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TurboCollector® is a patented pipe with fins inside. The fins provide a more turbulent flow and extract more efficient energy than a pipe with a smooth inside.
Benefits
For end user
Thermal properties
Conclusion
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GET LOWER BOREHOLE RESISTANCE WITH TURBOCOLLECTOR® AT LOWER FLOW RATES.
Check Borehole Thermal Resistances at different flow rates.

Borehole Resistance [K/(W/m)] Borehole wall temp 7.2°C
All pipes PE 40 SDR 17
Single U pipe
Single U pipe with spacer
Single U pipe TurboCollector®



PRESSURE DROP CAN BE ESTIMATED BY THEORETICAL MODELS
Check Pressure loss for different BHE at different flow rates.
Pressure drop [kPa]
Experimental Calculated Experimental Calculated
1. Single U pipe 2. Single U pipe TurboCollector®

1.5 m3/h
1.8 m3/h
2.5 m3/h

RESULT
Experimental values are in good agreement with theoretical values for TurboCollector®.

HEATING / COOLING
This study carried out in the heat extraction (simulating the heating mode). It is also of interest to see the results in the cooling mode. Another study was therefore conducted to check the behavior of an inner-finned pipe at two different flow rates in one borehole. This was done by a conventional Thermal Response Test (TRT) in a water-filled borehole equipped with a 200 m length with a TurboCollector® with double U-pipe 32 mm SDR 17. The fluid was mixture of water and ethanol 15%.

CONCLUSION
Flow rate can significantly effect on pressure drop and also on pump energy consumption. Results indicate that micro fins in the TurboCollector® can contribute to better heat transfer also pipes with the inner finned improve the performance of the system by lower borehole thermal resistance. TurboCollector® can be applied for both cooling and heating mode meanwhile the flow rate can be set in a lower value compared to the smooth pipes.
 
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