Indian Liquid Cooling Data Centre MEP — ASHRAE TC 9.9 + OCP + TIA-942 + ASHRAE 127
A 10 MW IT-load Indian liquid-cooled data centre demands ₹1,770 Cr MEP capex with CDU + warm-water DLC loop + dry coolers + backup chiller + Tier III 2N power + UPS + DG + clean-agent fire. ASHRAE TC 9.9 + OCP + TIA-942 + ASHRAE 90.4/127 govern. DLC cuts PUE from 1.45 air to 1.18 + 35 % cooling energy saved. Three failures: mixed air-cooled + liquid-cooled rack zones causing thermal plume issues, leak detection + spill containment under-spec, 25°C precision cooling instead of 40°C warm-water free-cooling.
Indian liquid cooling data centre framework
India data centre liquid cooling — Yotta + CtrlS + NTT + STT GDC + ESDS + Nxtra + AWS Mumbai begin direct-liquid-cooling for AI + GPU racks at > 30 kW/rack. Standards stack — ASHRAE TC 9.9 Liquid Cooling Guidelines 2024 + Open Compute Project OCP + TIA-942 + Uptime + ASHRAE 90.4 + ASHRAE 127 (computer room cooling) + IEC TR 62681. DLC (Direct Liquid Cooling) cuts cooling power 35-50 % vs traditional CRAH.
10 MW IT-load liquid-cooled data centre MEP scope
| Component | Function | Spec | Capex (₹ Cr) |
|---|---|---|---|
| CDU (Coolant Distribution Units) | rack-level DLC supply | 40 × 250 kW CDU | 185 |
| Primary chilled water loop | 40°C supply (warm-water DLC) | — | 85 |
| Secondary loop manifold + RDHx | rack-side | — | 125 |
| Dry coolers (free-cooling primary) | 40°C inlet → 35°C return | — | 185 |
| Backup chiller (CRAH for ambient + comms) | — | — | 185 |
| Hot/Cold aisle containment | — | — | 45 |
| Power supply (Tier III 2N) | — | 15 MVA | 485 |
| UPS + Battery (Li-ion) | 15-min | — | 220 |
| DG sets (4 × 3000 kVA CPCB IV+) | — | — | 125 |
| BMS + DCIM | — | — | 45 |
| Fire-fighting (clean-agent + water-mist) | NFPA 76 | — | 85 |
| Total 10 MW liquid-cooled DC | — | — | 1,770 |
| PUE (Power Usage Effectiveness) | — | 1.18 (vs 1.45 air) | — |
| Annual energy saved (vs air-cooled) | — | 35% cooling kWh | — |
Three Indian liquid-cooled DC MEP failures
- Mixed liquid + air rack zones without segregation — high-density GPU rack (30-100 kW) on DLC + adjacent legacy 5-10 kW rack on air must be segregated. Indian retrofit DCs mix — air-cooling cant handle adjacent thermal plumes. Specify dedicated liquid-cooled hall per OCP.
- Leak detection + spill containment under-spec — DLC manifold leak = catastrophic IT damage. ASHRAE TC 9.9 + OCP require continuous leak sensors + epoxy floor + spill containment at every CDU. Indian projects often skip.
- 40°C warm-water DLC vs 25°C precision cooling waste — DLC operates at 40°C supply / 50°C return = free-cooling year-round in Bengaluru + Pune. Indian projects use 25°C precision cooling wasting compressor power. Specify 40°C warm-water per ASHRAE TC 9.9 Class W4.
- ASHRAE TC 9.9 Thermal Guidelines for Data Centers 5th Edition 2021 + Liquid Cooling 2024.
- Open Compute Project OCP Cooling Environments Workgroup 2024.
- TIA-942-C:2024 + Uptime Institute Tier 2024.
- ASHRAE 90.4-2022 + ASHRAE 127:2024 — Computer Room Cooling.
- IEC TR 62681:2024 — Liquid Cooling Best Practice.
- BICSI 002:2024 — Data Centre Design + Implementation.
- NFPA 76:2024 — Telecom + DC Fire Protection.
- EU EN 50600 series + India MeitY DC Policy 2024.