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太空也要卷液冷 马斯克把AI算力搬上天,第一道坎却是「怎么散热」

太空也要卷液冷 马斯克把AI算力搬上天,第一道坎却是「怎么散热」
太空也要卷液冷
马斯克把AI算力搬上天,第一道坎却是「怎么散热」
摘要

SpaceX与英伟达联手打造Starmind AI1轨道数据中心,单星峰值功率跃升至250kW。真空环境没有对流,唯有110㎡液冷辐射板才能把芯片热量排入太空——液冷,正是这场“算力上天”能否成立的技术命门。

01
8月4日凌晨,一条公告让「太空液冷」从概念走向订单

SpaceX与英伟达在美东时间8月4日联合宣布,双方将共同开发Starmind AI1卫星的算力载荷——每颗卫星都会搭载英伟达最新一代Rubin GPU与Vera CPU,面向的不是通信,而是把数据中心级AI算力直接送进近地轨道。消息公布当天,恰逢SpaceX上市后首份财报发布前夕,英伟达股价上涨3%,SpaceX股价上涨8.7%。

这不是一次性的技术展示。按照官方规划,Starmind未来要组成一个最多容纳100万颗卫星的星座,通过高速激光链路互联,构成一台分布式的“太空超级计算机”,再借助星链把处理结果传回地面。

02
为什么要把数据中心送上天

这个决定并不突兀。今年2月,SpaceX已经向美国联邦通信委员会(FCC)提交申请,计划在距地500至2000公里的轨道上部署最多100万颗“轨道数据中心”卫星,通过petabit级光通信网络实现星间数据交换——这一规模将远超目前地球轨道上约1.5万颗在役卫星的总量。

其背后的驱动力,是地面AI基础设施正在触碰到几个硬约束:

约束维度

地面AI数据中心

Starmind轨道液冷数据中心

电力供应

依赖区域电网,扩容受限、审批周期长

210kW太阳能翼阵持续供电,不占用地面电网

选址与土地

受制于城市规划、邻避效应、土地成本

无需征地拆迁,轨道空间理论上不设上限

用水压力

大量水冷机组消耗地表淡水资源

不依赖水资源,采用闭环液冷循环

散热方式

冷却塔/水冷+风冷混合,依赖大气对流

板级液冷循环+110㎡辐射板,向真空辐射排热

单机功率密度

对标NVIDIA GB300/NVL72机架级别

峰值250kW,可支撑一整机柜Rubin NVL72

主要风险

电费、水权、社区反对

真空散热效率、微陨石撞击、轨道拥挤

图表整理自SpaceX / Starmind官网及公开报道

换句话说,太空为AI算力提供了近乎无限的太阳能和场地,但也把一个在地面本就棘手的问题——散热——直接搬进了没有空气对流的真空环境,难度不降反升。

03
真正的拦路虎:真空里怎么给芯片降温

“太空没有风,也没有水。唯一能带走热量的物理方式,只剩下辐射。”

这正是Starmind AI1设计中分量最重的一部分。据Notebookcheck、hi-tech.ua等在2026年7月对Starmind官网技术细节的报道,SpaceX公布的散热方案是:每颗卫星配备约110平方米的可展开液冷辐射板,采用冗余泵驱动的闭环液冷回路,并设有微陨石与轨道碎片防护结构,把热量以红外辐射的形式排入太空真空。

Starmind AI1星载液冷散热闭环示意|制图:熵潭Entropy Pool

这套逻辑其实与地面数据中心的“芯片级液冷+冷却塔”思路一脉相承:芯片产生的热量先由贴合GPU/CPU的冷板导出,再通过循环泵送进入更大面积的散热介质完成排热。区别只在于,地面数据中心最终把热量交给大气对流或蒸发冷却,而Starmind必须依赖110平方米的辐射板,把热量“辐射”进太空——效率天生低于对流散热,因此才需要如此巨大的展开面积来弥补。

SpaceX的AI1星本身也印证了这套系统的分量:整星展开高度20米、翼展70米,比波音747-8机身还要宽,其中相当一部分结构正是太阳能翼和液冷辐射板。

04
功率越堆越高,液冷压力同步升级

今年6月首次公开AI1设计时,SpaceX给出的数字是平均120kW、峰值150kW,大致相当于地面一台现代AI服务器机架的功耗。而随着与英伟达的合作深化,据Sawyer Merritt、The Kobeissi Letter等在8月4日公告当天披露的信息,SpaceX已将单星峰值功率上调67%至约250kW,平均功率上调33%至约160kW——这一峰值功率,恰好能够支撑一整机柜英伟达Rubin NVL72(72颗Rubin GPU)的满载运行。

Starmind AI1单星功率演变

功率每上一个台阶,芯片侧的发热密度就同步跃升一级。对地面数据中心而言,这早已是液冷渗透率快速提升的核心驱动力;对Starmind而言,这意味着110平方米的辐射板设计从一开始就不是冗余配置,而是勉强够用的下限——散热系统的设计裕度,直接决定了这颗卫星能塞进多少张GPU。

05
质疑仍在:真空液冷的“期末考”要到2027年才交卷

并非所有人都认可这套方案已经成熟。多家报道指出,业内专家和竞争对手对真空辐射冷却的实际效率提出质疑,也有外部工程师认为,SpaceX公布的热管理与整星质量参数之间可能存在出入;与此同时,大规模卫星群对本已拥挤的近地轨道意味着更高的碰撞与空间治理风险。

从时间表看,首批AI1原型星要到2027年初才发射测试,核心任务之一就是验证液冷辐射板的真实热性能、在轨供电效率与算力加速能力;FCC对百万颗卫星规模申请的最终许可也仍未落地——目前的Starmind,本质上是一份“拿到了芯片订单、但还没通过太空实测”的液冷方案。

06
熵潭视角:太空液冷是极限场景,地面液冷是确定性答案

把110平方米的辐射板送上近地轨道,本质上是在做一件事:用更极端的工程手段,去解决AI芯片功率密度失控这个共同命题。太空液冷受限于真空辐射的物理天花板,注定是少数超大规模玩家才能负担的极限方案;而在地面,这个命题有更成熟、也更快能落地的答案——高效浸没式冷却液,正在把这场“功率密度竞赛”的解法,从实验室带进每一座正在扩容的AI数据中心。

从Rubin GPU到NVL72机柜,芯片侧的发热强度只会持续攀升,无论战场是在地面机房还是近地轨道,液冷都不再是可选项,而是AI算力能否稳定运行的前提条件。

关于熵潭Entropy Pool

熵潭Entropy Pool由熵遇新材料出品,专注AI数据中心液冷产业,核心产品为熵潭冷却液,聚焦浸没式冷却液技术研发与应用,助力AI算力基础设施安全、高效、可持续运行。

参考资料

1. Interesting Engineering,《Nvidia to build Starmind AI1 satellite compute payload for SpaceX》, 2026-08-04, interestingengineering.com/ai-robotics/spacex-nvidia-starmind-ai1-compute-payload

2. SpaceX 官方X账号发布, 2026-08-04, x.com/SpaceX/status/2084723854534951218

3. Sawyer Merritt(X平台), 2026-08-04, x.com/SawyerMerritt/status/2084724480648380896

4. TeslaNorth.com,《SpaceX, Nvidia Partner to Bring Rubin GPUs to Starmind AI Satellites》, 2026-08-04, teslanorth.com/2026/08/04/spacex-nvidia-partner-to-bring-rubin-gpus-to-starmind-ai-satellites

5. crypto.news,《SpaceX taps NVIDIA for 1M-satellite AI plan》, 2026-08-05, crypto.news/spacex-taps-nvidia-for-1m-dollars-satellite-ai-plan

6. BeInCrypto,《SpaceX Joins a Club It Was Missing From In New Nvidia Deal》, 2026-08-04, beincrypto.com/nvidia-spacex-ai-satellites-stocks-react

7. The Kobeissi Letter(X平台), 2026-08-04, x.com/KobeissiLetter/status/2084727346968363234

8. Shay Boloor(X平台), 2026-08-04, x.com/StockSavvyShay/status/2084725302572486957

9. Notebookcheck,《SpaceX lists AI1 satellite cooling specs for Starmind data center in space》, 2026-07-11, notebookcheck.net

10. hi-tech.ua,《SpaceX has revealed the characteristics of the cooling system for orbital data centers Starmind》, 2026-07-12, hi-tech.ua

11. optimusk.blog,《Starmind Satellites: The Technical Specs So Far》, optimusk.blog/blog/starmind-satellite-specs

12. Starship SpaceX Wiki(Fandom),「Starmind」词条, starship-spacex.fandom.com/wiki/Starmind

13. cryptobriefing.com,《SpaceX and Nvidia are building a data center in orbit》, 2026-08-04, cryptobriefing.com/spacex-nvidia-starmind-ai1-satellite-orbital-compute

14. 光通信Pro(c114.net.cn),《马斯克官宣Starmind太空AI算力,规划100万颗计算卫星入轨》, 2026-06-24, c114.net.cn/industry/93318.html

END

来源:综合整理自网络。

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  1. CONNECT:[ UseTime:0.000853s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001411s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000714s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000443s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000644s ]
  6. SELECT * FROM `set` [ RunTime:0.000197s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000558s ]
  8. SELECT * FROM `article` WHERE `id` = 904280 LIMIT 1 [ RunTime:0.000834s ]
  9. UPDATE `article` SET `lasttime` = 1785984123 WHERE `id` = 904280 [ RunTime:0.005742s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000608s ]
  11. SELECT * FROM `article` WHERE `id` < 904280 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001196s ]
  12. SELECT * FROM `article` WHERE `id` > 904280 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001173s ]
  13. SELECT * FROM `article` WHERE `id` < 904280 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.017988s ]
  14. SELECT * FROM `article` WHERE `id` < 904280 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002513s ]
  15. SELECT * FROM `article` WHERE `id` < 904280 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.020430s ]
0.177467s