Efficient Cooling Network Management System

1. Point 5 - Cooling Network - Key Primary Water Primary Water at 20-25C – Produced by Cooling Towers Chilled Water Chilled Water at 5C – Produced by Chillers Mixed Water Mixed Water at 14-18C – Produced by Chillers, Heat Exchangers or by mixing Primary & Chilled water Demi Water Demi Water at 16-18C – Produced by Heat Exchangers from either Chilled or Mixed water – Divided into Copper and Aluminum types Eau Bruite Eau Bruite – Supplied for refilling of circuits & the fire fighting network Standard Power Standard Power – Electrical power for pumps, valves & chillers Diesel Backup Diesel Backup Power – Electrical power for control panels & cubicles Comp Air Compressed Air – Instrument Quality or Standard air for actuators and control valves

2. Point 5 - Cooling Network SF5 Cooling Towers PRIMARY 22-25 C Primary Water SUX5 Chilled Water Production CHILLED 5 C MIXED 14-15 C Mixed + Chilled Water USC55 CV Zone Cooling Distribution CHILLED - 7 C DEMI - 18C MIXED -16C Mixed + Chilled + Demi Water

3. Point 5 –Security of Supply SF5 Cooling Towers SH5 Comp Air SU5 Comp Air Failure of cooling towers results in loss of primary water to chilled water production, Interlocks stop the chillers. 1-2 hours before underground areas are affected. Failure of Eau Bruite will stop circuits when circuits are required to be refilled. Failure of power will stop cooling towers, however system shall restart automatically on return of power Diesel Backup Power only for supply of control Panels Diesel Backup Instrument Air To CV Zone, Tracker & CRYO Standard Air To Eau Bruite, Gas Room & UXC Standard Power supply of pumps & Chillers Standard Power SUX5 Chilled Water Production Failure of chillers results in loss of chilled or mixed water. 1-2 hours before users in underground areas are affected, depending on current demand Failure of distribution pumps will affect users within 30 mins. Failure of Eau Bruite will stop circuits when circuits are required to be refilled Failure of power will stop chillers & distribution circuits, however system shall restart automatically on return of power Eau Bruite for Refilling of all circuits & Fire Fighting network Failure of distribution pumps will result in a loss of cooling immediately. Failure of Eau Bruite or Demi Water supply will stop circuits when circuits are required to be refilled. Failure of power will stop chillers & distribution circuits, however system shall restart automatically on return of power. Failure of instrument air will stop circuits on low pressure condition USC55 CV Zone Cooling Distribution Demi Water supply for Refilling of circuits in UXC DEMI WATER POINT 4 DEMI WATER POINT 4 PM56 EAU BRUITE

4. Point 5 – Cooling Network SH5 Comp Air SU5 Comp Air SF5 Cooling Towers 22-25 C 22-25 C SH5 SUX5 Chilled Water Production 5-6 C SUX5 SX5 14-15 C SCX5 5-6 C 14-15 C 5-6 C SR5 SGX5 SX5 USC55 CV Zone Cooling Distribution DEMI WATER POINT 4 DEMI WATER POINT 4 TRACKER HVAC BUS BAR YOKE END CAP MUONS ECAL RACKS COLD BOX PM56 EAU BRUITE c c c A A 7 C 16 C 14-15 C 5-6 C 18 C 18 C 18 C 18 C 17.9 C +/- 0.02

5. SF5 Cooling Towers SH5 Comp Air SU5 Comp Air Primary Water Diesel Backup Control Cubicle Primary Water Filling Standard Power Equipment Power Redundant Pumps SH5 SUX5 The SF5 Cooling Towers are used to generate primary cooling water between 18-22C. This water is used to directly cool some equipment, however mainly this water is used to Transfer heat away from the Chilled water production system – Primary water heat exchangers. The water in this circuit is treated with chemicals to prevent corrosion and bacteria. The Cooling towers are refilled from the Eau Bruite supply located in the PM54. The refilling is to compensate for evaporation and filtering processes. PM56 EAU BRUITE

6. Point 5 – Cooling Network SH5 Comp Air SU5 Comp Air SF5 Cooling Towers SH5 SUX5 Chilled Water Production SUX5 SX5 SCX5 SR5 SGX5 SX5 USC55 CV Zone Cooling Distribution DEMI WATER POINT 4 DEMI WATER POINT 4 TRACKER HVAC BUS BAR YOKE END CAP MUONS ECAL RACKS COLD BOX PM56 EAU BRUITE

7. SUX5 Chilled Water Production SH5 Comp Air SU5 Comp Air SF5 Cooling Towers The 3 closed loops are refilled from the Eau Bruite supply located in the PM54. The refilling is mainly to compensate for filtering processes. Diesel Backup Control Cubicle Standard Power Equipment Power Primary Water from Cooling Towers 3.3KV Power Primary Water Heat Exchangers Chiller Power Primary Water Filling Chilled Water Chillers Mixed Water Chillers Chilled Water Filling Mixed Water Filling Backup Mixed Water Production from chilled Water Network SUX5 SX5 SCX5 Mixed Water for RACKS SR5 SGX5 SX5 USC55 Chilled Water USC55 Mixed Water Chilled Water for dehumidification & Cooling in Ventilation Systems Chilled Water for Tracker System & Cooling in Ventilation Systems Mixed Water for RACKS & Detector Cooling The SUX5 chilled water production system consists of 3 separate closed loops – Primary, Mixed & Chilled. Two independent groups of chillers cool water to 5C for chilled water users and 14C for mixed water users. The Primary water heat exchangers transfer the heat created by the chillers to the SF5 cooling towers. 5 groups of distribution pumps then supply this cooled water to the users. PM56 EAU BRUITE

8. Point 5 – Cooling Network SH5 Comp Air SU5 Comp Air SF5 Cooling Towers SH5 SUX5 Chilled Water Production SUX5 SX5 SCX5 SR5 SGX5 SX5 USC55 CV Zone Cooling Distribution DEMI WATER POINT 4 DEMI WATER POINT 4 TRACKER HVAC BUS BAR YOKE END CAP MUONS ECAL RACKS COLD BOX PM56 EAU BRUITE

9. USC55 Cooling Distribution SH5 Comp Air SU5 Comp Air The cooling circuits in the USC supply water at several different temperatures dependant on the user requirements. The circuits are Chilled, Mixed or Demineralised types, the demineralised circuits are additionally split into copper or aluminum types. Filling water is supplied from the Mixed and Chilled water supply circuits or from the demineralised supply from Point 4. The system is also reliant on compressed air to operate valves and to maintain a constant pressure on the expansion tanks. Diesel Backup Control Cubicle Standard Power Equipment Power Instrument Air For Operating Valves Shared with Tracker & Cyro Chilled Water from SUX5 Chilled Water Production at 5C SUX5 Chilled Water SUX5 Mixed Water Mixed Water from SUX5 Chilled Water Production at 14C Chilled Water Filling Demineralised Water Filling Mixed Water Filling DEMI WATER POINT 4 TRACKER HVAC BUS BAR Copper YOKE Copper END CAP Copper MUONS Aluminum ECAL Aluminum RACKS COLD BOX PM56 EAU BRUITE

10. Point 5 – Eau Bruite & Demi Water SU5 Comp Air Eau Bruite and Demi water are used to refill the cooling circuits at point 5. Loss of supply of these services will eventually lead to a shut down of any circuit whenever a filling valve is opened. Additionally the Eau Bruite circuit is used to maintain a constant pressure to the firefighting network and to maintain the level of the storage tanks for the Foam fire fighting system in the UXC. Loss of the SU5 standard compressed air will stop the Eau Bruite pumps located in the PM56. This air is used to position the flow control valves that are located here. The Eau Bruite pumps are powered by a Diesel Backup power supply. SF5 Primary Water Basin Reservoir UXC Fire Fighting Basin (Foam) Fire Fighting Network SUX5 Primary Water Filling SUX5 Chilled Water Filling SUX5 Mixed Water Filling Diesel Backup Control Cubicle CV Zone – Demi Water Filling DEMI WATER POINT 4 PM56 EAU BRUITE

11. Point 5 – Compressed Air Network SH5 Comp Air SU5 Comp Air Currently there is one compressor for the Instrument air Network and one for the standard air network. The proposal is to install an additional 2 new compressors to work in parallel with the existing Instrument air compressor to provide duty standby backup. These compressors can also be linked to the standard air compressor to additionally provide backup to this system. Standard Air Instrument Air L3 Air Existing System New SH5 Compressor New SH5 Compressor SH5 Compressor SU5 Compressor Dryer Dryer L3 Air Instrument Air Standard Air Proposed System

12. Point 5 – Control & Supervision System TCR DIP DCS The Cooling systems at Point 5 utilise Duty/Standby PLC’s. This ensure that control is maintained at all times even during a network outage. Data is retrieved from the PLC’s by a OPC server located in the CCC. This OPC server sends requested data to the TIM database from where it is transmitted to the TCR. Analogue variables are published on the DIP database, which the DCS system can retrieve data from. Additionally hardwired contacts from the control system are connected directly to the DSS system. TIM PCvue Server Remote PC VGTCCOOLUSC55 OPC SERVER TECHNICAL NETWORK DSS PCvue GTCCOOLUSC55 LOCAL TOUCH PANEL Duty / Standby PLC’s