Rack CDUs, Row CDUs & Liquid to Liquid CDUs with multiple configurations. Without CDUs you cannot support the next generation of GPUs
The Coolant Distribution Unit is exactly what is says it is, It simply pumps the liquid at the desired temperature directly onto the chip or server. This can be seen as the middle-man for the cooling infrastructure to the IT
Why do we need two loops for liquid cooling?
- For high quality facility water which is not available in most Data Centers - a secondary loop is required between the cold plates and the Chiller, also known as TCS (technology Cooling system) and FWS (Facility Water system). This helps achieves the highest quality of water while keeping WUE low. Most systems have 20%-35% Water glycol mix
- Precision control of the coolant
- The CDU can control the pressure, flow and temperature. To help manage the AI workloads which can go from 4MW to 130MW in milliseconds
IMPROVED COOLING PERFORMANCE
Coolant distribution units serve as the vital core of liquid-cooled data centers, functioning as the beating heart that sustains optimal operating conditions.
These units play a critical role in effectively managing the distribution of coolant throughout the intricate network of servers and equipment, ensuring efficient heat dissipation and maintaining stable temperatures within the facility. By regulating the flow of coolant, these units enable data centers to operate at peak performance levels while reducing energy consumption and enhancing overall system reliability.
Their strategic placement and precision engineering underscore their significance in the seamless operation and longevity of liquid-cooled data centers, making them indispensable components in the realm of high-performance computing infrastructures.
BENEFITS OF COOLANT DISTRIBUTION UNITS
Liquid cooling through Coolant Distribution Units (CDUs) has revolutionized cooling performance in data centers, offering unparalleled efficiency and enhanced thermal management capabilities.
By utilizing liquid as a cooling medium, CDUs facilitate the transfer of heat more effectively than traditional air cooling methods, allowing for greater heat dissipation and improved temperature regulation.
This advanced cooling technology not only optimizes the thermal management of servers and equipment but also enables data centers to operate at higher power densities without compromising performance or reliability.
OPTIMISING THERMAL MANAGEMENT WITH CDU SOLUTIONS
The precision control and efficiency of liquid cooling systems through CDUs have significantly contributed to reducing energy consumption, minimizing carbon footprint, and maximizing the overall cooling performance of modern data centers, making them a cornerstone of sustainable and high-performance computing infrastructures.
RackChiller CDU800 Coolant Distribution Unit
RACKCHILLER Row CDU is designed for efficient and safe supply
of IT equipment. The entire system is focused on providing the highest
reliability, availability, and serviceability for supporting direct-to-chip
liquid cooling.
Our Row CDU is fed from a primary facility water system (FWS), where the
integrated pumps drive the secondary technology cooling system
(TCS) cooling loop flow. The heat exchanger transfers the excess heat
from the secondary coolant to the primary.
The complete system is integrated into an aesthetical enclosure
with removable side panels and doors. The CDU can be installed
onto a slab or raised floor, in-row with equipment racks or into a
separate facility room.
- BENEFITS
Enable waste heat reusage or high temperature
primary circuit for maximum cooling efficiency - Minimize amount of row CDUs required for
high load installations optimize floor space requirements - Systems layout and design reduces need for
redundant CDUs - Minimum planning effort
- Reduced set up and installation time
ASHRAE S Class for CDUs
TCS Fluid Class | Equipment Environment Specifications for Liquid Cooling | ||
Typical Infrastructure | Maximum TCS Supply Temperature °C °(F) | ||
FWS | TCS Facilites | ||
S30 | Chiller / Cooling Tower | CDU | 30 (86) |
S35 | Chiller / Cooling Tower | 35 (95) | |
S40 | Cooling Tower | 40 (104) | |
S45 | Cooling tower / Dry Cooler | 45 (113) | |
S50 | Dry Cooler | 50 (122) | |
HOW MUCH ENERGY COMES OUT OF THE
DATA CENTER AS HEAT, HOW MUCH IS
WASTED, AND WHAT CAN YOU DO WITH IT?
The short answer to the first question is “all of it”. Energy is not
consumed, but changes from one form to another. After performing
other tasks, what is left is heat. So a 100MW data center will produce,
100MW of heat. Once the energy is heat, any that is not wanted
elsewhere is released and, effectively, wasted.
SO WHY IS LIQUID COOLING
THE PERFECT CHOICE FOR
HEAT RECOVERY?
Short answer: higher temperature heat is better useable than low
temperature, e.g. with water warmer than 50°C you can already heat
homes, hospitals, swimming pools, saunas, the list goes on. And is
not exclusive to colder climates. Draw the heat once and eventually
sell that energy back to the grid. A win win for data center providers
especially colocation companies.
Air Loop Primary Side
Heat Reuse
Primary (Facility) Plumbing Dry Cooler, Chiller or
Adiabatic and Pumps
Value of a Coolant Distribution Unit (CDU)
- Isolates IT Equipment from the main Facility Water System (FWS)
- Improves operational monitoring and control of water delivered to IT Equipment racks - Maintain proper Technology Cooling System (TCS) water temperature with proper alarms
- Maintains water temperature to maximum allowable per equipment specification
- Monitors and maintains water temperature above dew point to avoid condensation - Controls and maintains flow requirements to the IT Racks/Equipment with proper alarms
- Allows for proper control and maintenance on TCS loop with regards to water chemistry
- Provides localized filtration of water circuit for FWS and TCS loops
- Common for CDUs to offer dual filters to allow for maintenance during operation - Limits maximum allowable operating pressure on the TCS water loop
RackChiller CDU100 In-Rack CDU – Technical Specifications
RackChiller CDU40 In-Rack CDU – Technical Specifications
Featured Products
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Partnership with Iceotope
- Partnership with Iceotope to leverage „Ku:l2“ chassis design
- Standard server in special, sealed chassis with dry and wet compartments
- Cooling infrastructure (pumps, coolant to water heat exchanger, coolant distribution) directly inside the chassis
- Requires 21“ rack, fits within standard Varistar CP, lose 1U per server
- nVent manifolds
- CDU or RPU where required
- Chillers / Dry Coolers
- Combines with nVent LTA solution
