1. ATLAS Thermosiphon Electrical Distribution and Run Modes
O.Crespo-Lopez
EDMS:

2. Two Operation Modes Normal Mode: (180kW @ -70°C)
all the system is full power
Warm mode: -20°)
Could be used if normal power trip or during electrical maintenance
Could be used if we loose the water system

3. Power sources For the thermosiphon cooling system we use UPS power:
All the PLC cabinets
Brine pumps
Liquid heaters
Dummy load heater for minimal flow
Diesel power (warm mode)
High temp stage of the chiller with limited power
Normal power (normal mode)
All the rest of the system

4. Electrical distribution
USA15 level 2
Surface SX1 & outside

5. Installed power 100 kW 231 kW 237 kW 10 kW 40 kW 30 kW 15.5 kW
Chiller Circuit
Low Temperature Stage
High Temperature Stage
100 kW
Primary Water
Water Circuit
TS Condenser
Brine Circuit
231 kW
237 kW
10 kW
40 kW
30 kW
15.5 kW
10 kW for PLC’s
72 kW
5 kW for PLC’s
24 kW
power
Normal
Diesel in kW
UPS in kW
Surface
530 kW
100 kW
40 kW
underground
115.5 kW -
100 kW
By-pass
Full power dummy load
Normal power
UPS power
Diesel power

6. Normal mode 231 kW 237 kW 10 kW 40 kW 30 kW 15.5 kW 10 kW for PLC’s
Chiller Circuit
Low Temperature Stage
High Temperature Stage
Primary Water
Water Circuit
TS Condenser
Brine Circuit
231 kW
237 kW
10 kW
40 kW
30 kW
15.5 kW
10 kW for PLC’s
Used only during start-up
72 kW
5 kW for PLC’s
24 kW
The chiller can provide -70°C
By-pass
Full power dummy load
Normal power
UPS power
Diesel power

7. Warm mode 100 kW 100 kW 10 kW 40 kW 30 kW 10 kW for PLC’s 56 kW
Chiller Circuit
Low Temperature Stage
High Temperature Stage
100 kW
Primary Water
Water Circuit
TS Condenser
Brine Circuit
100 kW
10 kW
40 kW
30 kW
10 kW for PLC’s
56 kW
5 kW for PLC’s
The chiller can provide -20°C with water or air cool condenser
24 kW
By-pass
Full power dummy load
Normal power
UPS power
Diesel power