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Asian Region Mechanical Design

This review highlights the changes in the Asian region mechanical design scheme for the ILC project, including the cooling water system, HVAC system, and plumbing system. The review compares different cooling tower types and loop systems, and discusses the tunnel ventilation system and water supply and drainage system. Detailed analysis and further study are required.

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Asian Region Mechanical Design

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  1. Asian Region Mechanical Design Masanobu Miyahara /KEK Atsushi Enomoto /KEK Masahito Huse /Nikken Sekkei ILC Mechanical & Electrical Review

  2. Content ① Cooling Water System ② HVAC System ③ Plumbing System Summary ILC Mechanical & Electrical Review

  3. Scheme Change Image Asian Region Mechanical Design Previous Scheme by DRFS Latest Scheme ILC Mechanical & Electrical Review

  4. New Scheme Kamaboko Tunnel Asian Region Mechanical Design Chw pipe Cooling Warter pipe Fan Coil Unit Groundwater Drainage Ditch ILC Mechanical & Electrical Review

  5. Cooling Water System Heat LoadSummary Cooling Water Load Air + CHw Load Total200MW ILC Mechanical & Electrical Review

  6. Cooling Water System 3 Types of Cooling Tower A:Closed-circuit Type (Air-cooled) B: Closed-circuit Type (Water cooled) C: Open Type (Water cooled) • IN RDR, we adopted Air-cooled type Cooling tower • Makeup water Issue in Mountainous area ILC Mechanical & Electrical Review

  7. Cooling Water System 3 Types of Cooling Tower Makeup water for 200MW cooling - WE (Evaporation)=288m3/h - WC (Carry over) =47m3/h - WB (Blow down) =241m3/h Reservation of Makeup water Groundwater =1m3/km/min*30km*60min/h =1,800m3/h Total =WE+WC+WB =576m3/h ILC Mechanical & Electrical Review

  8. Cooling Water System Comparison of Cooling Tower Type RDR Scheme TDR Scheme ILC Mechanical & Electrical Review

  9. Cooling Water System 2-Loop & 3-Loop System 2-Loop System 3-Loop System 1st Loop To separate the 100m=1MPa water pressure to the 2nd Loop 2nd Loop Galvanized steel Piping 2nd Loop D.I. Water Stainless steel Piping 3rd Loop D.I. Water Stainless steel Piping ILC Mechanical & Electrical Review

  10. Cooling WaterSystem Comparison of 2-Loop and 3-Loop ILC Mechanical & Electrical Review

  11. Cooling WaterSystem 3-Loop LCW System (AH-3) Stand-by (back-up) From ground level to access hall L≒1000m ⊿H≒100m De-ionize filter De-aerator ILC Mechanical & Electrical Review

  12. Cooling WaterSystem 3-Loop ChwSystem In case of AH-3(5km) Turbo Refrigerator 2+1(standby) 2nd-Loop 3rd-Loop ILC Mechanical & Electrical Review

  13. Cooling WaterSystem Inverter turbo refrigerator COP at the midterm =up to 20.0 COP (CoefficiencyOf Performance) the rating point =7.0 ILC Mechanical & Electrical Review

  14. HVAC System Tunnel Ventilation System in RDR It’s difficult to make Chevron We need to change the scheme ILC Mechanical & Electrical Review

  15. HVAC System Tunnel Ventilation System Exhaust Fan Air Handling Unit D≒2m Sloped tunnel About 1,000m ILC Mechanical & Electrical Review

  16. HVAC System Tunnel Ventilation System Outside air Heated or Cooled by Air-handling Unit Exhaust Fan Air Handling Unit Exhaust ILC Mechanical & Electrical Review

  17. Fire !! HVAC System Tunnel Ventilation System Helium Quench !! Exhaust Fan Air Handling Unit Smoke exhaust Quench exhaust ILC Mechanical & Electrical Review

  18. HVAC System Tunnel Ventilation Rate High velocity (>1.0m/s) cause vibration ! Velocity < 0.5 m/s Beam Tunnel Service Tunnel 0.5m/s×16m2×3600 =28,800m3/h 28,800m3/h÷(16m2×5000m) =0.36N/h 0.5m/s×12m2×3600 =21,600m3/h ILC Mechanical & Electrical Review

  19. HVAC System Typical Tunnel Section Plan Chw PIPE LCW PIPE Fan Coil Unit 3rd Loop Cooling Water Skid R7000 4402 6000 5500 R4000 Maintenance space 1098 400 Mesh grounding 1500 3300 3500 4200 11000 11600 ILC Mechanical & Electrical Review 12000

  20. Plumbing System Drainage System Ground water : Amount of Springwater 1t/km.Min. →30t/min. 43,000t/day Cooling water leakage : to the DP tank for RI monitoring ILC Mechanical & Electrical Review

  21. Plumbing System Water Supply and Drainage System Drainage System Leaked cooling water is pumped up to access hall Ground water is running through the ditch ILC Mechanical & Electrical Review

  22. Plumbing System Water Supply and Drainage System Source of Makeup water is ground water Source of potable water is city water Water Supply System ILC Mechanical & Electrical Review

  23. Asian Region Mechanical Design Summary (1) • Cooling Water System • Use the open type Cooling Tower System • Use 3-Loop System (⊿t=11℃) • - Inverter Turbo Refrigerator is used to make CHW • HVAC System • - Air Ventilation is through the Duct in Access tunnel • Ventilation in ML tunnel is “Duct-less”, 0.5m/s Velocity • Fire Smoke is extracted to the surface through AH,AT. ILC Mechanical & Electrical Review

  24. Asian Region Mechanical Design Summary (2) • Plumbing System (water supply) • City water is used for the potable water. • Groundwater is used for the makeup water of CT. • Drainage System • - Groundwater is flow down to the Access Hall through • the Drainage ditch under the Service Tunnel. • - Leaked Cooling Water to the DP tank for RI Monitoring • We need more detailed study by the time next meeting in Korea ILC Mechanical & Electrical Review

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