Gratte Brothers: Mechanical & Electrical precision
Gratte Brothers is a third-generation family business, established in 1946 that has been offering M&E solutions for over 35 years; its first data centre project dates back to 1995. During the last six years, the company has consistently delivered 30 megawatts of IT power to the mission critical construction market every year.
“We offer specialist knowledge when it comes to resilient engineering services” assures Gratte’s Engineering Director, Remi Suzan. “We've worked with DC supply chains for decades, and have good relationships with our manufacturers and specialist subcontractors. Our contract engineers, site managers, and in-house commissioning teams don't just understand how they work, but ‘why’ they need to work that way, and they bring that deep knowledge to every project.”
Gratte Brothers has worked with Ark for over a decade; an integral part of its partner ecosystem developing modular DC solutions with low energy consumption at their core. “ Together with Ark’s other partner contractors, we worked on developing a modular energy centre that could be associated with the prefabricated data centres that could then be deployed either as a single unit or as multiple units, depending on what Ark needed at the time,” confirms Suzan. “The energy centres containing the UPSs and LV panels were all provided with a cooling system designed on external fresh air. It was calculated that for 98% of the year it could operate without mechanical cooling which was only required in exceptional circumstances at high-peak summer periods.”
“Ark are way ahead of the game when it comes to sustainability,” reckons Suzan. “Their approach is more than just a green message on their website; they really mean it.” Looking to the future, Gratte is exploring the potential for gas turbine generators and hydrogen power systems (HPS) and is fully behind the increased industry focus on supporting net zero strategies. “Back in the 90s, the idea of a green data centre was almost laughable. They were built purely with speed to market in mind and about as green as a bucket of napalm. Now that we can use adiabatic fresh air cooling systems for IT equipment with heat recovery in all of our air solutions allied with the use of photovoltaic panels and LED lighting, energy efficiency has greatly improved.”
“Gratte Brothers, along with JCA, are our preferred mechanical and electrical engineering partners helping us develop improved energy centre solutions. We were also keen to modularise this process so our partners came up with a unique solution which not only utilises the data centre cooling to cool the energy centre, but also allows Ark to build the energy centre off site - improving health and safety while reducing material waste and cost. Though competitors in the market, Gratte Brothers and JCA are both family-run businesses that integrate well with Ark. They’re really adaptable and always looking to innovate. When we need to ensure speed to market, and in times of crisis like we’ve experienced during the pandemic, we rely on these partnerships to deliver safely to our customers.”
Andy Garvin, Director of Design, Construction & Operations, Ark Data Centres.
3 ways crypto mining is impacting the data centre industry
Around the world - particularly in Russia, Eastern Europe and China - the global rise of crypto currency values has been driving an en masse industrialisation of the mining process. The trend has been bubbling away for several years, as the home mining rig has largely found itself edged out by hyperscale server farms comprising some of the largest data centres anywhere in the industry - all designed to mine crypto.
The demands placed on a facility built and run as a mining operation are somewhat different to those placed on a hyperscale cloud facility or enterprise data centre. Reliability isn’t so much of an issue; if a mine goes down for a few hours, money is lost, but your data centre won’t take half the websites in Western Europe down along with it.
On the flipside, density and cooling are much, much more important. To make a crypto mining operation profitable, you need to be harvesting more crypto currency (be it Ethereum, Dogecoin, or the perennial Bitcoin) than you’re paying for electricity by a significant margin. As a result, some of the most efficient cooling and hyper-dense rack architecture from the past few years - like two-stage liquid cooling - has originated as a crypto mining solution. Now, hyperscale cloud operators in particular are recognising the benefits of these innovations and applying them to other aspects of the data centre industry.
1. Liquid Cooling
Crypto data centres have always been as dense as possible, with their racks running at maximum capacity all day, all year round. By contrast, the average enterprise or cloud data centre isn’t necessarily running at peak capacity 24/7; workloads fluctuate with demand. However, as that demand has skyrocketed over the past year in particular, cloud and enterprise operators have looked to crypto’s preference for liquid cooling as a way to run data centres closer to the ragged edge of performance than ever before.
One example of this is LiquidStack. The Hong Kong startup makes a revolutionary two-phase liquid cooling solution for data centres, which was developed over a number of years inside Bitfury, one of the world’s leading crypto miners. “Bitfury is sharing our knowledge with the global data center community and we are excited that Microsoft and other internet giants can benefit from our years of experience and investment to best practice liquid cooling,” said Joe Capes, CEO of LiquidStack in an interview with Data Centre Magazine.
Now, LiquidStack is going mainstream, with substantiated rumours that Microsoft is looking to adopt their DataTank solutions across its ever-expanding portfolio of hyperscale cloud regions.
2. Denser HPC
One of the issues that liquid cooling solves is how to create ultra-dense server racks that can function at high temperatures. Crypto miners have been grappling with this problem for about a decade now, and the lessons they’ve learned are being happily adopted by the burgeoning data centre HPC market - which is swelling in response to greater AI adoption and increasingly-sizable data sets.
With the density that mining rigs can achieve, server architects are cramming hundreds of kilowatts into individual racks - although it should be noted that this is still relatively rare. A 2020 survey from the Uptime Institute still found that the average density of data centre racks was growing rapidly, however.
“We expect density to keep rising. Our research shows that the use of virtualization and software containers pushes IT utilization up, in turn requiring more power and cooling. With Moore’s law slowing down, improvements in IT can require more multi-core processors and, consequently, more power consumption per operation, especially if utilization is low. Even setting aside new workloads, increases in density can be regarded a long-term trend,” said the report.
In 2020, average rack densities of 20kW and higher became a reality for many data centre operator.
3. Sustainability Concerns
Now for the more worrying news. The industrial scale and massive power consumption inherent to the crypto mining business - and the negative attention that miners are now starting to receive from government - could point towards a concerning future for data centre operators in the wider industry.
Last week, the Chinese government announced that it would open an inquiry into the participation of Beijing’s largest data centre operators - which include the country’s three largest telecom firms - in crypto mining. At a time when the PRC government is attempting a significant reversal of its approach towards sustainability, the significant power draw of crypto mining activities may be one more hurdle than China cares to deal with.
The Indian government is mulling a blanket criminalisation of all crypto mining in the country and, in the US, the State of New York is also looking into tightening regulatory restrictions on the industry.
While crypto mining data centres are not the same as cloud or enterprise facilities, operators should be careful lest the ire of lawmakers be the latest trend to make its way from the crypto sector into the mainstream.