VR2R-0435_r1

VR2R-0435

① SA Source

• Source: 開啟完整 SA 文章
• Section: Rack Level Infrastructure: Thermal
• Line hint: 364

Context Before

Consider Schneider’s GB300 Reference Design 111, presented in September 2025, as another example. In this reference design, the datacenter uses a dual-loop architecture: a chilled-water loop dedicated to air cooling and a separate, higher-temperature loop dedicated to liquid cooling.

Evidence

On the liquid side, the TCS circulates coolant to the cold plates at roughly 40C and returns it at a higher temperature, while the CDU transfers that heat into the facility water loop, which can enter the CDU at approximately 37C.

Context After

So 45C cooling is not entirely new. Even with this capability, most operators deploying Blackwell are still designing for 20-30C water temperatures. As a rough approximation, current Blackwell inlet temperatures are around room temperature, with outlet temperatures in the 40-50C range. Only a small number of operators have removed chillers from the loop in favor of highly optimized economizer designs where climate permits.

② Atomic Claim

在 liquid loop 中，TCS 以約 40°C coolant 供給 cold plates，回水溫度更高；CDU 再把熱傳到 facility water loop，而 facility water 進入 CDU 時約為 37°C。

• Epistemic Mode: ASSERTED
• Mapping Status: PARTIAL

③ Semantic Frame

{
  "attribute": "REFERENCE_LIQUID_LOOP_TEMPERATURES",
  "context_nodes": [],
  "entity": {
    "id": "04_knowledge_base/Cold plate",
    "label": "cold plate"
  },
  "frame_type": "ATTRIBUTE",
  "qualifiers": {
    "condition_text": "TCS/CDU/facility loop are plain text in source claim",
    "numeric_mentions": [
      "40°C",
      "37°C"
    ],
    "temporal_mentions": []
  },
  "value": {
    "numeric_mentions": [
      "40°C",
      "37°C"
    ],
    "value_text": "TCS supplies ~40°C coolant to cold plates; facility water can enter the CDU at ~37°C."
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
entity	cold plate	04_knowledge_base/Cold plate

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。