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Products · Rear-door heat exchangers产品 · 背板换热器

Can a rear door run on the warm water of an AI plant?背板能用 AI 冷站的温水运行吗？

No rear door here shows a W32–W45 rating.这里没有一款背板给出 W32–W45 水下的额定值。

In a warm-water AI plant, a door needs separate selection or its own colder loop; it suits 20–⁠50 kW retrofits, not the main heat path.在温水 AI 冷站里，背板要单独选型或配自己的较冷回路；它适合 20–⁠50 kW 的改造，而不是主散热路径。

Data as of 2026-10-15, reviewed monthly.数据截至 2026-10-15，每月复核。Condition: selected for the plant's water, or a separate colder loop前提：按冷站水温单独选型，或提供单独的较冷回路

Interactive figure of a generic unit with its parts named. Requires JavaScript.通用机组互动图，标有各部件名称。需启用 JavaScript。

Cold supply water冷水供水Warm return water暖水回水A generic unit, not to scale.通用机组，不按比例。

Inside an active rear-door heat exchanger主动式背板换热器的内部

How it works, and the sources工作原理和来源

The servers' fans push hot exhaust out of the rack's rear. The door's EC fans pull that air through a finned coil. Cold water in the coil takes the heat, and the cooled air goes back to the room. Water enters through one flexible hose, a header feeds the tube rows, and a second header and hose carry the warmed water away. The layout follows the public sources below: a frame on the rack that carries the hinges, a column of fans on the aisle side (nVent uses two columns), top or bottom water connections, and a drip tray. This drawing shows a top-fed water door seen from the rack side, with the fin pack cut back. The sources also show bottom feed, and nVent offers a condensate pump for top-fed doors, which is not drawn. The rack is shortened. The number of fans, header positions, return-bend cover, hose route, top bracket, number of hinges, and the valve and sensor positions are illustrative.服务器风扇把热排风从机柜后部吹出。背板换热器上的 EC 风机把热排风吸过翅片盘管，由管内冷水带走热量，冷却后的空气再回到机房。冷水从一根软管进入，经集管分配到各排换热管，升温后由另一根集管和软管排出。整体布置依据下列公开资料：机柜上承载铰链的框架、通道侧的一列风机（nVent 为两列）、顶部或底部水路接口，以及接水盘。本图画的是顶部进水的背板换热器，从机柜一侧观看，部分翅片已截去。资料中也有底部进水方式；nVent 为顶部进水机型提供冷凝水泵选项，图中未画。机柜高度已缩短。风机数量、集管位置、回弯护罩、软管走向、顶部支架、铰链数量以及阀门和传感器的位置均为示意。 nVent RDHX PRO technical datanVent RDHX PRO 技术资料 · Vertiv CoolLoop RDHx data sheetVertiv CoolLoop RDHx 数据表 · STULZ CyberRack product pageSTULZ CyberRack 产品页 · Legrand ColdLogik CL20 data sheetLegrand ColdLogik CL20 数据表 · Lenovo rack cabinet product guideLenovo 机柜产品指南 · OCP Door HX requirements for Open RackOCP Open Rack 门式换热器要求

The water behind each stated rating: supply temperature, °C每个标称额定值背后的水：供水温度，°C
Delta CoolDoor D50 (50 kW)台达 CoolDoor D50（50 kW） 12 °C · 50 kW12 °C · 50 kWRDHX PRO, 14 °C water (78 kW)RDHX PRO，14 °C 水（78 kW） 14 °C · 78 kW14 °C · 78 kWStulz RBW C0 (32.3 kW)Stulz RBW C0（32.3 kW） 14 °C · 32.3 kW14 °C · 32.3 kWCL20, 6 fans, maximum duty (93 kW)CL20，6 风机，最大工况（93 kW） 14 °C · 93 kW14 °C · 93 kWCL21 passive, best case (29 kW)CL21 被动，最佳工况（29 kW） 14 °C · 29 kW14 °C · 29 kWCL23 HPC, maximum duty (204 kW)CL23 HPC，最大工况（204 kW） 14 °C · 204 kW14 °C · 204 kWLenovo RDHx V2, 48U (45 kW)Lenovo RDHx V2，48U（45 kW） 16 °C · 45 kW16 °C · 45 kWCL20, 6 fans, nominal duty (80 kW)CL20，6 风机，额定工况（80 kW） 18 °C · 80 kW18 °C · 80 kWChilledDoor, top model (75 kW)ChilledDoor 最高型号（75 kW） 12.8–18.3 °C · 75 kW12.8–18.3 °C · 75 kWCL23 HPC, nominal duty (177 kW)CL23 HPC，额定工况（177 kW） 20 °C · 177 kW20 °C · 177 kWCL20, 6 fans, efficient duty (74 kW)CL20，6 风机，高效工况（74 kW） 21 °C · 74 kW21 °C · 74 kWCL23 HPC, efficient duty (164 kW)CL23 HPC，高效工况（164 kW） 23 °C · 164 kW23 °C · 164 kWRDHX PRO, 24 °C water (44 kW)RDHX PRO，24 °C 水（44 kW） 24 °C · 44 kW24 °C · 44 kWOCP reference test conditionOCP 参考测试工况 16 °C · reference16 °C · 参考
Delta CoolDoor D50台达 CoolDoor D50 12 °C, 50 kWRDHX PRO, 14 °C waterRDHX PRO，14 °C 水 14 °C, 78 kWStulz RBW C0Stulz RBW C0 14 °C, 32.3 kWCL20, 6 fans, maximum dutyCL20，6 风机，最大工况 14 °C, 93 kWCL21 passive, best caseCL21 被动，最佳工况 14 °C, 29 kWCL23 HPC, maximum dutyCL23 HPC，最大工况 14 °C, 204 kWLenovo RDHx V2, 48ULenovo RDHx V2，48U 16 °C, 45 kWCL20, 6 fans, nominal dutyCL20，6 风机，额定工况 18 °C, 80 kWChilledDoor, top modelChilledDoor 最高型号 12.8–18.3 °C, 75 kWCL23 HPC, nominal dutyCL23 HPC，额定工况 20 °C, 177 kWCL20, 6 fans, efficient dutyCL20，6 风机，高效工况 21 °C, 74 kWCL23 HPC, efficient dutyCL23 HPC，高效工况 23 °C, 164 kWRDHX PRO, 24 °C waterRDHX PRO，24 °C 水 24 °C, 44 kWOCP reference test conditionOCP 参考测试工况 16 °C · reference16 °C · 参考

ASHRAE W17 is facility water up to 17 °C, W27 up to 27 °C; warm-water AI plants run W32–W45. The hollow bar is the OCP reference test. Points from the same door are examples at different stated conditions, not a single-variable derating test; the table view lists the other conditions at each point. Every stated water-temperature point is shown.ASHRAE W17 指设施水最高 17 °C，W27 最高 27 °C；温水 AI 冷站按 W32–W45 运行。空心柱为 OCP 参考测试工况。同一背板的多个点是不同标称工况下的示例，不是单变量降额试验；表格视图列出各点的其他工况。显示全部标称水温工况点。

Only lines that state the supply water behind a rating appear here; 5 of 13 lines state no water or air temperatures for their rating. OCP's reference condition for a door rating is 16 °C purified water, 45 °C air entering, 30 °C leaving, at sea level.这里只显示写明额定值所用供水温度的系列；13 个系列中有 5 个未写额定点的水温和气温。OCP 的背板额定参考条件为 16 °C 纯化水、进风 45 °C、出风 30 °C、海平面。

The water behind each stated rating: supply temperature, °C每个标称额定值背后的水：供水温度，°C

Table表格

Stated point标称工况点Water in °C进水 °CkWOther conditions at this point该点的其他工况Source来源
Delta CoolDoor D50 (50 kW)台达 CoolDoor D50（50 kW）1250Return air 50 °C; water out 20 °C; air out not stated回风 50 °C；出水 20 °C；未写出风 (vendor claim)（厂商说法）link链接
RDHX PRO, 14 °C water (78 kW)RDHX PRO，14 °C 水（78 kW）1478"Air supply" 24 °C; air entering the door and water out not stated“供风” 24 °C；未写进门风温和出水温度 (vendor claim)（厂商说法）link链接
Stulz RBW C0 (32.3 kW)Stulz RBW C0（32.3 kW）1432.3Air in 40 °C, 20% RH; water out 19 °C; 30 Pa external pressure; air out not stated进风 40 °C、相对湿度 20%；出水 19 °C；外部静压 30 Pa；未写出风 (vendor claim)（厂商说法）link链接
CL20, 6 fans, maximum duty (93 kW)CL20，6 风机，最大工况（93 kW）1493Air in 58 °C, out 20 °C; water out 30 °C; "for illustration purposes"进风 58 °C、出风 20 °C；出水 30 °C；“仅供说明” (vendor claim)（厂商说法）link链接
CL21 passive, best case (29 kW)CL21 被动，最佳工况（29 kW）1429Air in 40 °C; water out 20 °C; 6,000 m³/h server airflow; air out not stated进风 40 °C；出水 20 °C；服务器风量 6,000 m³/h；未写出风 (vendor claim)（厂商说法）link链接
CL23 HPC, maximum duty (204 kW)CL23 HPC，最大工况（204 kW）14204Air in 65 °C, out 15 °C; water out 20 °C; "for illustration purposes"进风 65 °C、出风 15 °C；出水 20 °C；“仅供说明” (vendor claim)（厂商说法）link链接
Lenovo RDHx V2, 48U (45 kW)Lenovo RDHx V2，48U（45 kW）164525 °C ambient; air in and out and water out not stated环境 25 °C；未写进出风温和出水温度 (vendor claim)（厂商说法）link链接
CL20, 6 fans, nominal duty (80 kW)CL20，6 风机，额定工况（80 kW）1880Air in 55 °C, out 22 °C; water out 32 °C; "for illustration purposes"进风 55 °C、出风 22 °C；出水 32 °C；“仅供说明” (vendor claim)（厂商说法）link链接
ChilledDoor, top model (75 kW)ChilledDoor 最高型号（75 kW）12.8–18.37575 °F (23.9 °C) room, 35% RH; air in and out and water out not stated室温 75 °F（23.9 °C）、相对湿度 35%；未写进出风温和出水温度 (vendor claim)（厂商说法）link链接
CL23 HPC, nominal duty (177 kW)CL23 HPC，额定工况（177 kW）20177Air in 65 °C, out 22.5 °C; water out 30 °C; "for illustration purposes"进风 65 °C、出风 22.5 °C；出水 30 °C；“仅供说明” (vendor claim)（厂商说法）link链接
CL20, 6 fans, efficient duty (74 kW)CL20，6 风机，高效工况（74 kW）2174Air in 55 °C, out 25 °C; water out 34 °C; "for illustration purposes"进风 55 °C、出风 25 °C；出水 34 °C；“仅供说明” (vendor claim)（厂商说法）link链接
CL23 HPC, efficient duty (164 kW)CL23 HPC，高效工况（164 kW）23164Air in 65 °C, out 26 °C; water out 33 °C; "for illustration purposes"进风 65 °C、出风 26 °C；出水 33 °C；“仅供说明” (vendor claim)（厂商说法）link链接
RDHX PRO, 24 °C water (44 kW)RDHX PRO，24 °C 水（44 kW）2444"Air supply" 27 °C; air entering the door and water out not stated“供风” 27 °C；未写进门风温和出水温度 (vendor claim)（厂商说法）link链接
OCP reference test conditionOCP 参考测试工况16—Air in 45 °C, out 30 °C; purified water; sea level; conditions that may be assumed for a rating进风 45 °C、出风 30 °C；纯化水；海平面；可采用的额定参考条件link链接

Sources来源

  1. Delta Electronics InfraSuite CoolDoor D30 / D50Delta Electronics InfraSuite CoolDoor D30 / D50
  2. nVent (Schroff) RackChiller RDHX PROnVent (Schroff) RackChiller RDHX PRO
  3. Stulz CyberRack RBW C0 (earlier brochure)Stulz CyberRack RBW C0 (earlier brochure)
  4. USystems (Legrand) ColdLogik CL20 ProActiveUSystems (Legrand) ColdLogik CL20 ProActive
  5. USystems (Legrand) ColdLogik CL21 Smart PassiveUSystems (Legrand) ColdLogik CL21 Smart Passive
  6. USystems (Legrand) ColdLogik CL23 HPCUSystems (Legrand) ColdLogik CL23 HPC
  7. Lenovo ThinkSystem Rear Door Heat eXchanger V2Lenovo ThinkSystem Rear Door Heat eXchanger V2
  8. Motivair (Schneider Electric) ChilledDoorMotivair (Schneider Electric) ChilledDoor
  9. OCP ACS Door Heat Exchanger Requirements for Open Rack, Rev 1.0 (2021)OCP 开放机柜背板换热器要求 1.0 版（2021）
5of 13/ 13

Lines that state no water or air temperatures for their headline rating标题额定值未写水温和气温的系列

Datasheets and product pages数据表与产品页Full matrix完整矩阵
78 → 44kW

nVent RackChiller RDHX PRO: capacity at 14 °C supply water, then at 24 °C (the "air supply" also rises from 24 to 27 °C)nVent RackChiller RDHX PRO：14 °C 供水时的容量，以及 24 °C 时（“供风”也从 24 升到 27 °C）

Vendor datasheet厂商数据表nVentnVent
16°C

Water in OCP's reference test for rated door capacity, with 45 °C air entering and 30 °C leavingOCP 背板额定容量参考测试的进水温度，进风 45 °C、出风 30 °C

Open specification, 2021开放规范，2021OCPOCP

Judgement判断

Where the water-cooled doors in this sample state the supply water behind a rating, it is 12–18.3 °C, with some points at 20–24 °C; none shows performance on W32–W45 water.

So in a warm-water AI plant a door must be selected separately for that water or given its own colder loop; in my judgement doors fit 20–50 kW retrofits and the air share of liquid-cooled racks rather than the main heat path.

本次样本中写明额定供水温度的水冷背板，供水为 12–18.3 °C，部分工况点为 20–24 °C；没有一个显示 W32–W45 水下的性能。

因此在温水 AI 冷站里，背板要么针对这种水单独选型，要么配一条自己的较冷水回路；我的判断是，背板适合 20–50 kW 的改造以及液冷机柜中仍由空气带走的那部分热量，而不是主散热路径。

Judgement by LC. Sources: LC 的判断。来源：[1] [2] [3] [4] [5]

A rear-door heat exchanger cools a rack's exhaust air before it enters the room, with water in most lines here and refrigerant in one.背板换热器在机柜排风进入机房前把它冷却；这里大多数系列用水，有一个用制冷剂。

Go deeper继续深入

Compare two or three自选两到三款比较

○ = not stated by the vendor. Values keep the vendor's own conditions; they are not a ranking. Choose "—" in the third box to compare two.○ = 厂商未标称。数值保留厂商自己的工况，不构成排名。第三个框选"—"即可只比较两款。

The lines that state the full rating point写明完整额定工况的系列2

Rule: every line that states water in and out and air in and out for its rating.规则：写明额定值所用进出水温和进出风温的全部系列。

USystems (Legrand) ColdLogik CL20 ProActive

up to 93 kW; water 14 / 30 °C; air in 58 °C, out 20 °C.最高 93 kW；进 / 出水 14 / 30 °C；进风 58 °C、出风 20 °C。

6-fan model: 93 kW with 14 °C water in, 30 °C out, 58 °C air in and 20 °C air out; 80 kW at 18 °C water in (55 °C air in, 22 °C out, water out 32 °C); 74 kW at 21 °C (55 °C air in, 25 °C out, water out 34 °C). Air-in temperature also changes between points. Figures are "for illustration purposes".6 风机型号：进水 14 °C、出水 30 °C、进风 58 °C、出风 20 °C 时 93 kW；进水 18 °C 时 80 kW（进风 55 °C、出风 22 °C、出水 32 °C）；进水 21 °C 时 74 kW（进风 55 °C、出风 25 °C、出水 34 °C）。各工况的进风温度也不同。数据“仅供说明”。

Active (fans)主动式（带风机）

USystems (Legrand) ColdLogik CL23 HPC

up to 204 kW; water 14 / 20 °C; air in 65 °C, out 15 °C.最高 204 kW；进 / 出水 14 / 20 °C；进风 65 °C、出风 15 °C。

204 kW assumes 65 °C air entering and 15 °C leaving, with 14 °C water in, 20 °C out and 29.38 m³/h; Legrand shows the data "for illustration purposes". Such hot server exhaust is far from the OCP reference (45 °C). The datasheet also lists 177 kW (nominal) and 164 kW (efficient) at other conditions.204 kW 的前提是进风 65 °C、出风 15 °C，进水 14 °C、出水 20 °C、29.38 m³/h；Legrand 注明数据“仅供说明”。这么高的服务器排风温度远离 OCP 参考值（45 °C）。数据表另列额定 177 kW 和高效 164 kW，工况不同。

Active (fans)主动式（带风机）
The latest four product, contract and rule events最近四项产品、合同与法规事件4
  • Vertiv launches the CoolLoop RDHx worldwide, rated by Vertiv at up to 80 kW per rack, for 600 and 800 mm racksVertiv 全球推出 CoolLoop RDHx 背板，厂商标称每柜最高 80 kW，适用 600 和 800 mm 机柜 Rear-door launches背板产品发布 source来源
  • OptiCool launches a two-phase refrigerant rear door it rates at up to 120 kW, adding to its 30 and 60 kW unitsOptiCool 推出两相制冷剂背板，厂商标称最高 120 kW，补充其 30 和 60 kW 机型 Rear-door launches背板产品发布 source来源
  • Supermicro expands its rear doors to ten models it rates at 10–120 kW per door; its CEO cites up to 240 kW per rack (configuration not stated)Supermicro 将背板扩展到 10 个型号，厂商标称每门 10–120 kW；其首席执行官称每柜最高 240 kW（未说明配置） Rear-door launches背板产品发布 source来源
  • Supermicro adds ORv3 rear doors it rates at 10 to 120 kW to its OCP portfolioSupermicro 在其 OCP 产品组合中加入厂商标称 10 至 120 kW 的 ORv3 背板 Rear-door launches背板产品发布 source来源

A date marks an event that happened; the plans are shown above with their windows. The full six-year roadmap is in the next rows.有日期的是已发生的事件；计划及其时间窗口见上文。完整六年路线图在下面。

Company news: acquisitions, factories and funding公司动态：收购、工厂和融资2
  • preliminary初步 Schneider Electric completes 75% of Motivair施耐德完成收购 Motivair 75% 股权 Ownership股权 source来源
  • Planned计划 preliminary初步 Schneider expects to buy the remaining 25% of Motivair (2028)施耐德预计 2028 年收购 Motivair 剩余 25% announced 2025-022025-02 公布 Ownership股权 source来源
Full roadmap, makers and owners, and the method完整路线图、厂商与所有者、方法6 events6 个事件

Roadmap, 2023 Q4 – 2029 Q3路线图，2023 年第四季度至 2029 年第三季度

Dated events from official sources. Planned events show the window the source states; passing the window does not prove shipment. No future model is inferred.来自官方来源的有日期事件。计划事件显示来源给出的时间窗口；窗口过去并不代表已经出货。不推测未来型号。

Rear-door launches背板产品发布

  1. Mar 20252025 年 3 月 Vertiv launches the CoolLoop RDHx worldwide, rated by Vertiv at up to 80 kW per rack, for 600 and 800 mm racksVertiv 全球推出 CoolLoop RDHx 背板，厂商标称每柜最高 80 kW，适用 600 和 800 mm 机柜
  2. Sep 20252025 年 9 月 OptiCool launches a two-phase refrigerant rear door it rates at up to 120 kW, adding to its 30 and 60 kW unitsOptiCool 推出两相制冷剂背板，厂商标称最高 120 kW，补充其 30 和 60 kW 机型
  3. Jul 20262026 年 7 月 Supermicro expands its rear doors to ten models it rates at 10–120 kW per door; its CEO cites up to 240 kW per rack (configuration not stated)Supermicro 将背板扩展到 10 个型号，厂商标称每门 10–120 kW；其首席执行官称每柜最高 240 kW（未说明配置）
  4. Oct 20262026 年 10 月 Supermicro adds ORv3 rear doors it rates at 10 to 120 kW to its OCP portfolioSupermicro 在其 OCP 产品组合中加入厂商标称 10 至 120 kW 的 ORv3 背板

Ownership股权

  1. Feb 20252025 年 2 月 Schneider Electric completes 75% of Motivair施耐德完成收购 Motivair 75% 股权 preliminary初步
  2. Target 2028目标 2028 年 Schneider expects to buy the remaining 25% of Motivair (2028)施耐德预计 2028 年收购 Motivair 剩余 25% announced Feb 20252025 年 2 月公布 planned计划 preliminary初步

Makers and owners厂商与所有者

Listed companies behind the products on this page: 本页产品背后的上市公司：VertivVertiv, Schneider ElectricSchneider Electric, nVentnVent, Delta Electronics台达电子. Other makers: 其他厂商：Legrand (USystems) (not in the registry不在名单中); Stulz (private非上市); Lenovo (IT maker, not in the thermal registryIT 厂商，不在热管理名单中); Supermicro (IT maker, not in the thermal registryIT 厂商，不在热管理名单中); Rittal (private非上市); OptiCool (private非上市). See the value-chain map查看产业链地图 · CDU deep diveCDU 深度分析

Method方法

Specifications come from each vendor’s datasheet, brochure or product page; every quoted value is checked word for word against the source text by script (scripts/research/check_quotes.mjs). Events come from vendor announcements and are checked on the page. The OCP reference test condition comes from the OCP door heat exchanger requirements (2021). Evidence cut-off 2026-10-15. Personal research, not investment advice.规格来自各厂商的数据表、样本或产品页；每个引用数值都由脚本逐字对照来源原文核对（scripts/research/check_quotes.mjs）。事件来自厂商公告并在原页面核对。OCP 参考测试工况来自 OCP 背板换热器要求（2021）。证据截止 2026-10-15。个人研究，不构成投资建议。

Database view: the full rear-door matrix数据库视图：完整背板矩阵13 rows13 行
Showing显示 13

Values keep each vendor's own conditions and are not a ranking; rows are sorted by company. °F is converted to °C. ○ = not stated by the vendor (explained once here, not repeated in words in each cell).数值保留各厂商自己的工况，不构成排名；行按公司排序。°F 换算为 °C。○ = 厂商未标称（只在此说明一次，不在每格重复文字）。

Company and line公司与产品Type类型Capacity (vendor wording)容量（厂商原文）Water in / out °C进 / 出水 °CAir in / out °C进 / 出风 °CConditions stated工况披露Fans风机Depth厚度Notes说明
Delta Electronics
InfraSuite CoolDoor D30 / D50		Active (fans)主动式（带风机）up to 50 kW最高 50 kW
“Conditions for D50 rated capacity at return air: 50°C, Inlet water 12°C and outlet water 20°C”		12 / 2050 / —Some conditions stated写明部分工况4 EC fans4 台 EC 风机345 mm345 mmD50: 50 kW at 50 °C return air with 12 °C water in and 20 °C out (D30: 30 kW at 42 °C); Delta states that water above 12 °C requires derating. Air leaving not stated.D50：回风 50 °C、进水 12 °C、出水 20 °C 时 50 kW（D30：42 °C 时 30 kW）；台达说明进水高于 12 °C 需降额。未写出风温度。
Lenovo
ThinkSystem Rear Door Heat eXchanger V2		Passive被动式up to 45 kW最高 45 kW
“remove up to 35kW (42U) and 45kW (48U) into”		16 / —room 25室温 25Some conditions stated写明部分工况None: relies on the servers' fans无：依靠服务器风扇129 mm129 mmUp to 35 kW (42U) or 45 kW (48U) into 16 °C water at 25 °C ambient (Lenovo rack guide LP1498, May 2026). The product page asks for 18 or 22 °C ±1 °C water by ASHRAE room class and shows a curve, not a single rating.在 16 °C 水、25 °C 环境下最高 35 kW（42U）或 45 kW（48U）（Lenovo 机柜指南 LP1498，2026 年 5 月）。产品页按 ASHRAE 机房等级要求 18 或 22 °C ±1 °C 供水，并以曲线而非单一额定值表示。 Lenovo product pageLenovo 产品页
Motivair (Schneider Electric)
ChilledDoor		Active (fans)主动式（带风机）family 12–75 kW系列 12–75 kW
“Nominal Cooling Capacity (kW)* 12 30 45 55 65 70 70 70 75”		12.8–18.3 / —room 23.9室温 23.9Some conditions stated写明部分工况3–6 EC centrifugal fans, hot-swappable; up to 504–3,000 W3–6 台 EC 离心风机，可热插拔；最高 504–3,000 Wnot stated未披露Rated at a 75 °F (23.9 °C) room, 35% RH and 55–65 °F (12.8–18.3 °C) supply water; air entering the door and water leaving it are not stated.额定条件为 75 °F（23.9 °C）室温、35% 相对湿度、55–65 °F（12.8–18.3 °C）供水；未写进门空气温度和出水温度。
nVent (Schroff)
RackChiller RDHX PRO		Active (fans)主动式（带风机）up to 78 kW最高 78 kW
“78 kW @ 14°C supply water”		14 / —not stated未披露Some conditions stated写明部分工况12 brushless DC axial fans, 1,800 W12 台无刷直流轴流风机，1,800 W281 mm with fans含风机 281 mm78 kW at 14 °C supply water with 24 °C "air supply", 44 kW at 24 °C water with 27 °C "air supply"; 6.0 m³/h water, 10,000 m³/h air; propylene glycol up to 35%. Air entering the door and water leaving are not stated. nVent datasheet read from a distributor-hosted copy.14 °C 供水、“供风” 24 °C 时 78 kW；24 °C 供水、“供风” 27 °C 时 44 kW；水量 6.0 m³/h，风量 10,000 m³/h；丙二醇最高 35%。未写进门空气温度和出水温度。nVent 数据表读自经销商托管的副本。
Table read as labels followed by values, in order.表格按“先标签、后数值”的顺序读取。
OptiCool Technologies
Rear Door Heat Exchangers CDS-30 / 60 / 120 (refrigerant)		Active (fans)主动式（带风机）up to 120 kW最高 120 kW
“extracting up to 120 kW of heat per rack”		not stated未披露not stated未披露No water or air temperatures for the rating未写额定点的水温和气温Rear-door fans (count not stated); up to 396–3,834 W后门风机（未写台数）；最高 396–3,834 W8.75 in including transition kit含过渡件 8.75 英寸Two-phase refrigerant door, 30, 60 or 120 kW, with no rating conditions; the refrigerant and its temperatures are not stated.两相制冷剂背板，30、60 或 120 kW，未写额定工况；未写制冷剂及其温度。
Rittal
Rear Door Heat Exchanger		Active (fans)主动式（带风机）up to 80 kW最高 80 kW
“80 kW at 13,500 m³/h and 260 mm depth”		not stated未披露not stated未披露No water or air temperatures for the rating未写额定点的水温和气温Redundant fans (count not stated)冗余风机（未写台数）260 mm260 mm80 kW at 13,500 m³/h on Rittal's international page, but 70 kW in its US flyer and guide; no water or air temperatures. OCP Open Rack v3.Rittal 国际网页写 13,500 m³/h 时 80 kW，美国传单和指南写 70 kW；未写水温和气温。适用 OCP Open Rack v3。 Rittal US flyer (70 kW)Rittal 美国传单（70 kW）
Stulz
CyberRack Active Rear Door (2026 page)		Active (fans)主动式（带风机）up to 49 kW最高 49 kW
“Cooling capacity (kW): 49”		not stated未披露not stated未披露No water or air temperatures for the rating未写额定点的水温和气温EC fansEC 风机274 mm274 mm49 kW, 6,200 m³/h and five fans, with no water or air temperatures. An earlier Stulz brochure (RBW C0, below) states conditions; it is not known whether the 49 kW follows them.49 kW、6,200 m³/h、5 台风机，未写水温和气温。较早的 Stulz 样本（RBW C0，见下行）写明了工况；不知 49 kW 是否沿用。
Stulz
CyberRack RBW C0 (earlier brochure)		Active (fans)主动式（带风机）up to 32.3 kW最高 32.3 kW
“Cooling capacity1 kW 18.8 32.3”		14 / 1940 / —Some conditions stated写明部分工况5 fans, 0.80 kW5 台风机，0.80 kW330 mm330 mm32.3 kW with 40 °C air entering (20% RH) and water 14 °C in, 19 °C out, at 30 Pa external pressure; air leaving not stated. Brochure version mark "V1.1 05-18".进风 40 °C（相对湿度 20%）、进水 14 °C、出水 19 °C、外部静压 30 Pa 时 32.3 kW；未写出风温度。样本版本标记“V1.1 05-18”。
Supermicro
Rear Door Heat Exchanger (DCBBS)		Active (fans)主动式（带风机）up to 120 kW最高 120 kW
“Cooling Capacity Up to 120 kW Up to 100 kW Up to 80 kW”		not stated未披露not stated未披露No water or air temperatures for the rating未写额定点的水温和气温By model: 6 fans, up to 3.6 kW (120 kW model); 12 fans, up to 5 kW (100 kW); 5 fans, up to 2.1 kW (80 kW); smaller models and a fan-door-only unit also listed按型号：6 台风机、最高 3.6 kW（120 kW 型号）；12 台、最高 5 kW（100 kW）；5 台、最高 2.1 kW（80 kW）；另列有较小型号和仅风机门Varies by model因型号而异Up to 120 kW for the top model, with no water or air temperatures, flow or fluid. MGX, EIA and ORv3 racks.最高型号最高 120 kW，未写水温、气温、流量和介质。适用于 MGX、EIA 和 ORv3 机柜。
USystems (Legrand)
ColdLogik CL20 ProActive		Active (fans)主动式（带风机）up to 93 kW最高 93 kW
“93 Cooling Capacity - Maximum 5 Fan 6 Fan Maximum Duty kW 62”		14 / 3058 / 20Water in and out, air in and out stated写明进出水温和进出风温5 or 6 backward-curved centrifugal fans5 或 6 台后弯离心风机380 mm with frame含框架 380 mm6-fan model: 93 kW with 14 °C water in, 30 °C out, 58 °C air in and 20 °C air out; 80 kW at 18 °C water in (55 °C air in, 22 °C out, water out 32 °C); 74 kW at 21 °C (55 °C air in, 25 °C out, water out 34 °C). Air-in temperature also changes between points. Figures are "for illustration purposes".6 风机型号：进水 14 °C、出水 30 °C、进风 58 °C、出风 20 °C 时 93 kW；进水 18 °C 时 80 kW（进风 55 °C、出风 22 °C、出水 32 °C）；进水 21 °C 时 74 kW（进风 55 °C、出风 25 °C、出水 34 °C）。各工况的进风温度也不同。数据“仅供说明”。
Table layout: the 6-fan maximum (93) is printed above the 5-fan value (62).表格排版：6 风机最大值（93）印在 5 风机数值（62）上方。
USystems (Legrand)
ColdLogik CL21 Smart Passive		Passive被动式up to 29 kW最高 29 kW
“Max Duty kW 7 13 17 22 25 29”		14 / 2040 / —Some conditions stated写明部分工况None: relies on the servers' fans无：依靠服务器风扇198 mm198 mmUp to 29 kW with 14 °C water in, 20 °C out and 40 °C air entering, at the highest server airflow shown (6,000 m³/h); 7 kW at 1,000 m³/h.进水 14 °C、出水 20 °C、进风 40 °C，在所列最大服务器风量（6,000 m³/h）下最高 29 kW；1,000 m³/h 时 7 kW。
Table header values (air on 40 °C, water in 14 °C) print above their labels.表头数值（进风 40 °C、进水 14 °C）印在其标签上方。
USystems (Legrand)
ColdLogik CL23 HPC		Active (fans)主动式（带风机）up to 204 kW最高 204 kW
“Maximum Duty kW 204”		14 / 2065 / 15Water in and out, air in and out stated写明进出水温和进出风温10 backward-curved centrifugal fans, 1,691 W at 100%10 台后弯离心风机，100% 时 1,691 W415 mm415 mm204 kW assumes 65 °C air entering and 15 °C leaving, with 14 °C water in, 20 °C out and 29.38 m³/h; Legrand shows the data "for illustration purposes". Such hot server exhaust is far from the OCP reference (45 °C). The datasheet also lists 177 kW (nominal) and 164 kW (efficient) at other conditions.204 kW 的前提是进风 65 °C、出风 15 °C，进水 14 °C、出水 20 °C、29.38 m³/h；Legrand 注明数据“仅供说明”。这么高的服务器排风温度远离 OCP 参考值（45 °C）。数据表另列额定 177 kW 和高效 164 kW，工况不同。
Vertiv
CoolLoop RDHx (Liebert DCD)		Passive or active被动或主动family 35–80 kW系列 35–80 kW
“Nomal cooling capacity [kW} … 35 600 / 800 2000 / 2200 11200 66 … 80 800 (750) 2000 / 2200 15300 90 1 1/4" 8.7 2900W”		not stated未披露not stated未披露No water or air temperatures for the rating未写额定点的水温和气温Passive door, or an active module (power 550–2,900 W at nominal capacity)被动门，或加装主动风机模块（额定容量时功率 550–2,900 W）120 mm passive (151 mm with swivel joint); 310 mm with active module被动 120 mm（含旋转接头 151 mm）；加主动模块 310 mmNo water or air temperatures and no fluid behind the "nominal" capacities; a separate row gives 66–90 kW at 100 cfm per kW. ORv3 racks supported. "Nomal" is the datasheet's own typo.“额定”容量未写水温、气温和介质；另一行给出每 kW 100 cfm 时 66–90 kW。支持 ORv3 机柜。“Nomal”为数据表原文拼写错误。
Table read row by row: each row starts with the nominal kW of one model.表格按行读取：每行以一个型号的额定 kW 开头。