VR2R-0445_r1

VR2R-0445

① SA Source

• Source: 開啟完整 SA 文章
• Section: Rack Level Infrastructure: Thermal
• Line hint: 372

Context Before

With less temperature differential, you need higher water/coolant flow to remove the same amount of heat.

Evidence

In Blackwell reference architectures, the ceiling temperature is around 65C.

Context After

Although NVIDIA initially did not formally publish full specifications for Vera Rubin’s liquid cooling system, we believe the platform will support maximum coolant return temperatures up to 65C. This aligns with Nvidia’s warm-water operating envelope, and while the exact implication for delta-T depends on the chosen supply setpoint and flow control strategy, we can expect a slightly tighter delta-T.

② Atomic Claim

在 Blackwell reference architectures 中，ceiling temperature 約為 65°C。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "attribute": "COOLANT_CEILING_TEMPERATURE",
  "context_nodes": [],
  "entity": {
    "id": "04_knowledge_base/Blackwell",
    "label": "Blackwell"
  },
  "frame_type": "ATTRIBUTE",
  "qualifiers": {
    "condition_text": null,
    "numeric_mentions": [
      "65°C"
    ],
    "temporal_mentions": []
  },
  "value": {
    "numeric_mentions": [
      "65°C"
    ],
    "value_text": "reference-architecture ceiling temperature is around 65°C."
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
entity	Blackwell	Blackwell

⑤ Human Review

請在 Properties 逐項確認：

• 原文 → Atomic Claim 是否忠實
• Atomic Claim → Semantic Frame 是否忠實
• Canonical Entity mapping 是否正確
• Epistemic mode 是否保留原文語氣
• 最後選擇 review_action

Review state

Markdown 內文不是正式 approval。只有 Apply bridge 寫入的 Decision Ledger event 才是正式決策。