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Eurodifroid was selected to provide a cooling solution for variator installed in TBM drive
The tunnel boring machine digs the rock, the power of wheels modulated by speed controllers which are cooled by exchanger KWS supplying in cold water by the RFI cold water central.
| Reference | KWS 90 CAI | RFI 600 TWBBYHP |
| Quantity | 22 | 2 |
| Cooling capacity | 5,4 kW* | 57 kW** |
| Technology | Air / Water exchanger | Cold water central |
The RFI frigorific group is supplied in water by an external circuit, cools the water of circuit to be distribute at KWS air / water exchangers. This exchangers allows to evacuate enclosure's calories
They find his application in very polluted environments or very hot atmospheres. The equipment is completely hermetically closed to protect himself against dust.
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Equipment: KWS air / water exchanger
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Equipment: RFI frigorific group
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| Cooling capacity* | 5 400 W |
| Power supply | 230-1-50/60Hz |
| Power consumption | 130/180W |
| Running current | 0,57/0,8 A |
| Line protection | 1 A |
| Water flow | 600l/h |
| Internal protection | IP54 |
| Ambient temperature mini/maxi | 5/60°C |
| Noise | 68 dB(A) |
| Weight | 34 kg |
| Cooling capacity** | 57 000 W |
| Power supply | 400-3-50Hz |
| Running current | 54 A |
| Power consumption | 313550 W |
| Line protection | 63 A |
| Outlet water temperature | 7°C |
| Noise | 70 dB(A) |
| Pump pressure mini/maxi | 3,9/5,2 bar |
| Pump flow mini/maxi | 60/200 l/min |
| Ambient temperature mini/maxi | 10/40°C |
| Tank capacity | 100 l |
| Weight | 460 kg |