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Articles by Subzero Engineering
Why data center sustainability fails without operational discipline
Gordon Johnson is senior CFD manager at Subzero Engineering How prioritizing the small things with sustained investment and follow-through can help to pave the way to achieving true data center sustainability goals Even the most efficiently designed modern facilities experience energy loss in small, often invisible ways. Individually, these losses are insignificant and rarely worth writing in a sustainability report.
Rethinking Cooling, Power and Design in the AI Data Center
By 2026, the data center will no longer function as a static host for digital infrastructure. Instead, it will behave as a dynamic, adaptive system - one that evolves in real time alongside the workloads it supports. The driving force behind this shift is AI, which is pushing power, cooling, and physical design beyond previously accepted limits. Rack densities that once seemed impossible - 80 to 120 kW - are now commonplace.
CDUs: The Brains of Direct Liquid Cooling
Traditional air cooling has hit its limits as rack power densities surpass 100 kW due to the relentless growth of AI and high-performance computing (HPC) workloads. Already, CPUs and GPUs exceed 700–1000 W per socket, while projections estimate 1500 W+ going forward. Fans and heat sinks are just unable to handle these thermal loads at scale; air cooling has hit its limits. Hybrid cooling strategies are becoming the only scalable, sustainable path forward.
Special Edition: Developing Digital Infrastructure in a Hybrid World
As the year begins, the data centre industry confronts two critical challenges: addressing the AI-driven demand for increased data centre density, capacity, and power, while simultaneously advancing its efforts toward achieving Net Zero emissions.
Leveraging AI for sustainable data centres
Leveraging AI for sustainable data centres 23Jan posted by: Andy Connor, Subzero Engineering The digital age has meant that demand for data processing has soared in recent years, placing data centres front and central to the internet and cloud computing infrastructure. Interestingly, AI potentially plays both a causal and remedial role in the data centre sustainability equation. Read more about this in the Jan 2025 issue of PBSI, here. Contact Details and Archive...
Building the future together: Strategic partnerships for advancing sustainable AI practices
Demand for data processing has risen exponentially in recent years. According to the International Energy Agency (IEA), Internet users worldwide have more than doubled since 2010, with global Internet traffic increasing by 20 times as much.
Safeguarding data centres with CFD simulation
Gordon Johnson, Senior CFD Manager at Subzero Engineering, discusses how CFD simulations can help optimise cooling and improve energy efficiency in data centres. The recent rise in AI has led to vast amounts of computational power and data storage being required. This has led to a significant increase in the need for high-performance servers capable of handling complex tasks, pushing data centres to adopt a more robust infrastructure.
No me abandones: el riesgo ambiental y costoso de los activos no utilizados
Los centros de datos, en particular los que manejan computación de alto rendimiento (HPC), corren el riesgo constante de convertirse en activos abandonados. Los activos abandonados pueden ocurrir cuando las instalaciones no cumplen con su capacidad diseñada, ya no son económicamente viables debido a cambios en la tecnología o las necesidades comerciales, o no contribuyen de manera efectiva a las medidas de sostenibilidad.
Don't leave me stranded: The expensive and environmental risk of unused assets
Data centers, particularly those handling high performance computing (HPC), are at constant risk of becoming stranded assets. Stranded assets can occur when facilities do not meet their designed capacity, are no longer economically viable due to changes in technology or business needs, or fail to contribute effectively to sustainability measures. In the context of data centers, this often relates to cooling challenges and the cooling capacity that the ITE can’t use.
How to avoid becoming a stranded asset
Gordon Johnson, Senior CFD Manager at Subzero Engineering, addresses why data centres run the risk of becoming stranded assets, and explores measures that can be taken to avoid this outcome. Data centres, particularly those handling HPC, are at constant risk of becoming stranded assets.
How eCommerce and fintech firms are leveraging the power of AI-enabled data centres Original
The fintech and eCommerce sectors are booming. By 2026, the global eCommerce market is expected to be worth more than $8.1 trillion annually. Meanwhile, a recent study by McKinsey revealed there are now more than 272 fintech unicorns, with a combined market cap of $936 billion – a sevenfold increase in just five years.
Mission-critical enclosures
Mission-critical enclosures 05Nov posted by: Andy Connor, Subzero Engineering Underpinning this fast-moving digital world is not just the IT software and hardware, but the foundational layer of the data centre. At the very least, the data centres unable to meet digital demands because of ageing, inflexible infrastructure, are in real danger of losing business to competitors.
Why legacy modernisation is essential to reduce energy costs
By Andy Connor, EMEA Channel Director, Subzero Engineering https://www.subzeroeng.com/ As the demand continues to increase, new-build data centres and a large estate of legacy IT facilities will be vital in underpinning the ongoing demand for digital infrastructure. The question is, how can we best meet today’s sustainability challenges, alongside the equally important imperative of reducing energy costs?
Is hybrid cooling the future?
By using air cooling, containment, and liquid cooling together, owners and operators can optimise and future-proof their data centre environments, says Gordon Johnson, Senior CFD Manager, Subzero Engineering. Today, many data centres are experiencing increasing power density per IT rack, rising to levels that just a few years ago seemed extreme and out of reach, but today are considered both common and typical while simultaneously deploying air cooling.
Why legacy modernisation is essential to reduce energy costs
As the demand for digital infrastructure continues to increase, new-build data centres and a large estate of legacy IT facilities will be vital in underpinning the ongoing demand for digital infrastructure. The question is, how can we best meet today’s sustainability challenges, alongside the equally important imperative of reducing energy costs?
Colo Roof System
In the event of a fire, the panels shrink and drop away to preserve the fire sprinkler pattern Aluminum tracks are mounted to the ceiling and uniquely sized vinyl is hung from the track. The lightweight drop-in panels have a thickness of only 0.013” and are completely clear, allowing in the light from overhead lighting systems. As the Colo Roof containment system is modular in design, it can be easily attached to cabinets, doors, sidewall systems, and even vinyl.
Hot Aisle Containment - Keeping Data Centres Cool
Gordon Johnson – Senior CFD Manager – Subzero https://www.subzeroeng.com/ Flooding the data centre with cold supply air, in combination with an appropriate hot aisle containment solution, makes for a cost-effective, energy-efficient and environmentally-friendly facility, as Gordon Johnson, Senior CFD Engineer at Subzero Engineering, explains.
Rethinking Data Center Design to Maximize Efficiency
NEW WHITEPAPER explains why efficiency-optimized data center design and operation has never been more critical An environmentally friendly data center is always a cost-effective data center. Simplex Modular Cleanrooms & Separation Systems are now part of Subzero Engineering’s industry-leading product line for mission-critical environments. “Simplex” will become the branded name of Subzero’s Modular Cleanroom & Separation System line of products.
Africa - The New Data Centre Frontier?
Authored by Stavros Spyropoulos, Business Development Manager, Subzero Engineering https://www.subzeroeng.com Despite the many financial and operational challenges facing data centres, the sector continues to expand, with an increasing emphasis on secondary markets, edge and remote facilities – all of which is perhaps best typified by the significant opportunities evolving in the African continent. The growth of the global data centre industry shows no signs of slowing down.
Hot aisle containment – keeping data centres cool - Data Centre Review
Data centre designs are continuing to evolve, and recently, more facilities are being designed with slab floors and overhead cabling, often in line with Open Compute Project (OCP) recommendations.
How the right flooring can boost data centre efficiency
With the growing cost of power in Europe, energy efficiency should be a top concern for today’s data centre owners and operators, and in the future, design teams must carefully evaluate their infrastructure options. Average monthly wholesale electricity prices, per megawatt-hour, across Europe have risen from well under 100 euros in January 2020, breaking the 100 euros barrier in July/August 2021, to today’s levels of typically mid-300 euros, with Italy already over the 400 euros level.
Making the most of the data center modernization opportunity
There are many legacy data centers which can be refurbished and upgraded to meet the demands of today’s digital businesses. However, when planning and implementing a data center modernization strategy, the key requirements of speed, agility, scalability and sustainability need to be reflected in any infrastructure refresh. Digital transformation was gaining significant momentum before the global disruption of Covid-19.
The role of containment in mission-critical edge deployments
In recent years, edge computing has become one of the most prevalent topics of discussion within our industry. In many respects, the main purpose of edge data centres is to reduce latency and delays in transmitting data and to store critical IT applications securely. In other words, edge data centres store and process data and services as close to the end-user as possible. Edge is a term that’s also become synonymous with some of the world’s most cutting-edge technologies.
Enhancing performance with Computational Fluid Dynamics
The current and growing industry focus on sustainability has highlighted the need to work towards energy efficient data centre designs, which, in turn, should provide the perfect combination of sustainable operating conditions. The end result being truly optimised data centre performance. Computational Fluid Dynamics (CFD) plays a vital role when it comes to data centre construction, retrofit, and helping improve the efficiency and performance of legacy data centres.
Subzero launches Essential range of data center aisle containment products
Subzero Engineering has launched the "Essential" series of data center aisle containment products aimed at hyperscale, colocation, high-performance computing (HPC), and enterprise data center operators. The range offers a cost-effective vendor-neutral, quick-to-deploy, and flexible containment system. It is available globally, in three form factors: the Essential Line, Essential+, and AisleFrame.
Legacy data center modernization is key for sustainability
It’s no secret that today’s data centers are designed and built to be ultra-efficient.
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