STULZ worldwide

Liquid Cooling

STULZ - your partner for integrated liquid cooling infrastructures

The increasing use of high-performance computers is presenting cooling infrastructure with new challenges. The efficient and reliable management of extremely high heat loads is of major importance. Consequently, the demand for innovative cooling solutions is on the rise, with liquid cooling (LC) emerging as a particularly promising option. STULZ stands as your global partner, offering cutting-edge solutions to tackle these challenges and ensure future-proof cooling infrastructure.

Higher heat load density
Liquid Heat Conductivity
Energy Efficiency

To meet the increasing demand for computing power, driven by AI-based services, advanced analytics, and ongoing digitalization, processor capabilities are undergoing exponential growth. This leads to an increasing heat load per rack, necessitating solutions that can efficiently manage this heat while requiring less physical space for identical computing power.

Considering the increasing heat density in the racks, which can reach the limits of air cooling due to airflow restrictions and high temperature differences on the air side, it is essential to consider the higher thermal conductivity of liquids as an additional solution. Liquids can conduct heat between 50 and 1,000 times more efficiently than air. This results in higher operating temperatures per rack, expands opportunities for Free Cooling and facilitates easier heat reuse.

Liquid cooling can not only enhance energy efficiency but also promote sustainability in data center operations. Liquid Cooling Data Centers can achieve lower PUE by operating at higher temperatures, expanding Free Cooling potential even in warmer climates. By minimizing reliance on mechanical cooling, energy consumption is significantly reduced. In addition, liquid cooling maximizes heat reuse efficiency due to its high heat transfer capability and higher operating temperatures.


"As your cooling solutions partner, we're here to support you in navigating the complexities that arise when introducing liquids into data centers. Whether you're building liquid-cooled data centers or integrating liquid cooling into existing air-cooled infrastructure, we're ready to provide the answers and guidance you need."
Valeria Mercante, Team Lead Liquid Cooling Solutions, Global Product Management
 

 

Liquid Cooling brochure

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Liquid cooling technologies

Direct Chip Liquid Cooling (DCLC)

Central to this technology is the strategic placement of cold plates directly above heat sources, particularly the processors in server units. This close proximity ensures rapid and precise heat transfer, thereby optimizing cooling efficiency. The cooling process is facilitated by a networks of small tubes that guide a liquid coolant directly to the processors. Once absorbed by the liquid coolant, the heat is swiftly carried away and circulated through coolant distribution units to a re-cooler. Here, the heat is released into the surrounding environment, completing the cooling cycle. While liquid cooling serves as the foundation of the system, a complementary air-cooling component remains essential. Approximately 20-30% of the cooling requirement is fulfilled through air-cooling mechanisms, ensuring comprehensive thermal management.

Infrastructure

By isolating the Technology Cooling System (TCS) and Facilities Water System (FWS), the risk of cross-contamination and leaks is significantly reduced, thereby enhancing the overall reliability of the cooling system.

STULZ Products for Direct Chip Liquid Cooling

CyberCool CMU

The STULZ Coolant Distribution Unit CyberCool CMU is a central component in both direct liquid-to-chip cooling and immersion cooling solutions to maximize heat exchange within a limited footprint. This unit completely isolates the facility water system (FWS) and technology cooling system (TCS) sides of the liquid cooling system and accurately controls the supply temperature and flow rate of the coolant while consuming minimal power.

 

CyberCool Indoor

CyberCool Indoor is a Free Cooling Chiller, which enables liquid cooling solutions. Featuring an integrated water circuit, heat exchanger, and robust pumps, it ensures efficient cooling performance. This versatile unit can also function as a CDU (Cooling Distribution Unit), facilitating seamless heat transfer for liquid cooling systems. Elevate your cooling infrastructure with our innovative Free Cooling Chiller, delivering enhanced efficiency and performance wherever you need it.

 

Micro DC

The STULZ Micro DC is a server room in a rack and comprises all necessary infrastructure such as power, cooling, security, fire suppression, monitoring, and management.

 

Up to 100 kW per rack with direct liquid-to-chip cooling.

 

Immersion Cooling

Immersion Cooling entails submerging IT equipment, such as servers, entirely into a non-conductive liquid. Typically, this liquid is contained within an insulated tank, ensuring efficient heat dissipation. Heat generated by the submerged equipment is absorbed by the liquid. To maintain optimal operating temperatures, the heated liquid is then cooled using either an external or internal heat exchanger, which is in turn connected to a re-cooler. Even with this technology, a supplementary air cooling component remains indispensable. Approximately 5% of the heat load are covered by air-cooled systems.

Infrastructure

By isolating the Technology Cooling System (TCS) and Facilities Water System (FWS), the risk of cross-contamination and leaks is significantly reduced, thereby enhancing the overall reliability of the cooling system.

STULZ Products for Immersion Cooling

CyberCool CMU

The STULZ Coolant Distribution Unit CyberCool CMU is a central component in both direct liquid-to-chip cooling and immersion cooling solutions to maximize heat exchange within a limited footprint. This unit completely isolates the facility water system (FWS) and technology cooling system (TCS) sides of the liquid cooling system and accurately controls the supply temperature and flow rate of the coolant while consuming minimal power.

 

CyberCool Indoor

CyberCool Indoor is a Free Cooling Chiller, which enables liquid cooling solutions. Featuring an integrated water circuit, heat exchanger, and robust pumps, it ensures efficient cooling performance. This versatile unit can also function as a CDU (Cooling Distribution Unit), facilitating seamless heat transfer for liquid cooling systems. Elevate your cooling infrastructure with our innovative Free Cooling Chiller, delivering enhanced efficiency and performance wherever you need it.

 

Modular Data Centers with integrated Immersion Cooling

STULZ Modular, one of the leading providers of modular data center solutions and a wholly owned subsidiary of STULZ GmbH, is cooperating with an Amsterdam based tech company to offer a concept for a modular data center solution with integrated immersion cooling for indoor and outdoor installation.

 

Get in touch

Do you have questions about our solutions or need technical advice?

 

Our experts will be happy to assist you with a thorough analysis and competent advice.

Contact us

Liquid Cooling Solutions

From design and independent product consulting to installation and maintenance, STULZ offers all services and products from a single source:

  • Integrated liquid cooling systems, manufactured and tested
  • Individual climate units to complement your existing liquid cooling infrastructure

Read more about Liquid Cooling in our blog article.

Close to you around the world

With 23 subsidiaries comprising 11 production sites and 12 sales companies in Africa, America, Asia, Europe and Oceania, the company is at your side at all times. In addition, STULZ has exclusive agreements with numerous sales and service partners on all continents and is therefore represented in over 150 countries around the globe. With this global network of partners and independent manufacturers for direct chip and immersion cooling, STULZ is the right partner for all liquid cooling requirements.


Solutions from a single source

As a company with subsidiaries and partners around the globe, we have specialized in the field of mission-critical cooling technology for over 50 years. Our portfolio ranges from classic air-conditioning systems, chiller units and air handlers to Liquid Cooling solutions and humidification systems, micro data centers, services, and a proprietary monitoring software. We offer you all the cooling technology you need in the extremely dynamic world of information technology – from consulting and planning through to manufacturing and installation.


Customized to your individual needs

You have the challenge, we have the solution. The requirements for Liquid Cooling systems vary enormously depending on location, hydraulic conditions, infrastructure, and protection, not to mention reliability. STULZ offers solutions for your individual requirements – our teams will work with you to plan and implement your application.


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Åland Afghanistan Albania Algeria American Samoa Andorra Angola Anguilla Antarctica Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia Bonaire, Sint Eustatius and Saba Bosnia and Herzegovina Botswana Bouvet Island Brazil British Indian Ocean Territory British Virgin Islands Brunei Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Cape Verde Cayman Islands Central African Republic Chad Chile China Christmas Island Cocos (Keeling) Islands Colombia Comoros Congo Congo-Brazzaville Cook Islands Costa Rica Croatia Cuba Curaçao Cyprus Czech Republic Côte d’Ivoire Denmark Djibouti Dominica Dominican Republic Ecuador Egypt El Salvador Equatorial Guinea Eritrea Estonia Eswatini Ethiopia Falkland Islands Faroes Fiji Finland France French Guiana French Polynesia French Southern Territories Gabon Gambia Georgia Germany Ghana Gibraltar Greece Greenland Grenada Guadeloupe Guam Guatemala Guernsey Guinea Guinea-Bissau Guyana Haiti Heard Island and McDonald Islands Honduras Hong Kong SAR of China Hungary Iceland India Indonesia Iran Iraq Ireland Isle of Man Israel Italy Jamaica Japan Jersey Jordan Kazakhstan Kenya Kiribati Kosovo Kuwait Kyrgyzstan Laos Latvia Lebanon Lesotho Liberia Libya Liechtenstein Lithuania Luxembourg Macao SAR of China Madagascar Malawi Malaysia Maldives Mali Malta Marshall Islands Martinique Mauritania Mauritius Mayotte Mexico Micronesia Moldova Monaco Mongolia Montenegro Montserrat Morocco Mozambique Myanmar Namibia Nauru Nepal Netherlands New Caledonia New Zealand Nicaragua Niger Nigeria Niue Norfolk Island Northern Marianas North Korea North Macedonia Norway Oman Pakistan Palau Palestine Panama Papua New Guinea Paraguay Peru Philippines Pitcairn Islands Poland Portugal Puerto Rico Qatar Reunion Romania Russia Rwanda Saint Barthélemy Saint Helena, Ascension and Tristan da Cunha Saint Kitts and Nevis Saint Lucia Saint Martin Saint Pierre and Miquelon Saint Vincent and the Grenadines Samoa San Marino Saudi Arabia Senegal Serbia Seychelles Sierra Leone Singapore Sint Maarten Slovakia Slovenia Solomon Islands Somalia South Africa South Georgia and the South Sandwich Islands South Korea South Sudan Spain Sri Lanka Sudan Suriname Svalbard Sweden Switzerland Syria São Tomé e Príncipe Taiwan Tajikistan Tanzania Thailand The Bahamas Timor-Leste Togo Tokelau Tonga Trinidad and Tobago Tunisia Turkey Turkmenistan Turks and Caicos Islands Tuvalu Uganda Ukraine United Arab Emirates United Kingdom United States United States Minor Outlying Islands Uruguay US Virgin Islands Uzbekistan Vanuatu Vatican City Venezuela Vietnam Wallis and Futuna Western Sahara Yemen Zambia Zimbabwe
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