Nov 23, 2020

Clean energy backup: Data centres to ditch diesel generators

Data Centres
Energy Management
Joanna England
4 min
As part of the drive towards sustainability, new data centre innovations could see facilities running without their emergency backup generators
As part of the drive towards sustainability, new data centre innovations could see facilities running without their emergency backup generators...

Diesel generators for the data centre industry ensure that mission critical applications never go offline. But power-hungry information storage hubs could soon get rid of their backup generators in the drive towards greater sustainability. 

One recent study suggested that in developed countries where the data industry is booming, these space age storage information facilities that require state-of-the-art cooling, are responsible for burning up 1% of the entire energy grid usage.

As processing power, High Powered Computing (HPC) and demands for storage space increases, so does the energy consumption of the industry. However, the latest innovations in renewable energy and self-powered data centre technology, suggests the diesel back-up generator will soon be a thing of the past. 


Microgrids are decentralised groups of electricity sources that can operate connected to the traditional grid. But microgrids can also disconnect and switch to “island mode” functioning autonomously as physical or economic conditions dictate. 

Considering most data centres are now switching energy supplies to a raft of renewable options, some experts believe microgrids could be the backups of the future. 

In a recent report for Microgrid Knowledge, industry analyst, Bill Kleyman explains, “In today’s world, going green is essential. Microgrids can actively leverage a wide array of green power technologies, including solar, wind, fuel cells, renewable natural gas, combined heat and power (CHP) plants, and energy storage technologies. Even natural gas generators have far lower emissions than traditional diesel backup generators. Microgrids also can intelligently integrate renewable energy into the energy mix.”

New cooling technology

Research into edge-computing has led to innovative technology that keeps servers cool in rugged conditions. This could well be modified to suit future, server technology. The less power required to run a data centre, the more the alternatives to backup diesel generators become available. 

Schneider Electric, a leader in digital transformation of energy management and automation, has partnered with the immersion cooling technology firm Iceotope. The collaboration has led to an innovative approach to coolant delivery. The solution is to flood a sealed server chassis with coolant. The coolant can be used in standard data centre racks while standard servers are retrofitted with liquid cooling.

“The number one problem immersion cooling solves is high power density,” says Rich Miller, Founder and Editor of Data Centre Frontier. 

“Growth in machine learning has driven growth in deployments of server GPUs, which are used to train deep learning models. Those power hungry chips can take rack power densities well beyond what a standard data centre design is able to cool.” 

He continues, “Many users can still get away with air based cooling, and liquid cooled rear door heat exchangers that cool air right at the rack have been the most popular approach to solving this problem.”

Kevin Brown, senior VP of innovation and CTO of Schneider Electric’s Secure Power division, says the solution will be popular because server fans are no longer required, significantly reducing energy requirements. “You can probably get at least a 15% energy reduction in a lot of environments by going to liquid cooling,” 

He adds that eliminating fans means eliminating moving parts that inevitably require maintenance and replacements.

Battery backup

Gas fuel cells and lithium-ion batteries are two alternatives to diesel backup generators currently being considered. 

Today there are several large fuel cell implementations at data centre sites, but many of them are used to supplement grid energy. However, an eBay data centre in Utah is currently using fuel cells as a sole energy source and relies on the utility grid instead of generators for backup. 

The battery pilot trials that started in 2019 have provided vital information that is aiding the research into cleaner energy for data centres. The biggest consideration is the amount of battery life a lithium-ion battery system provides. In 2018, the technology yielded 90 minutes of power. Now, developments have increased that to approximately three hours.


Meanwhile, Microsoft has plans to eliminate its dependence on fossil fuels in the next decade. The company aims to be carbon neutral by 2030, which will have major implications for its data centres, many of which have emergency backup diesel generators.

However, the company has put years of research into its sustainable transition to find effective methods of alternative power supplies.

Microsoft first announced its dedication to the sustainability of its facilities in 2012. Since then, it has embraced carbon footprint reducing technologies. 

The company has revealed it will take one of two paths with its backup generators. The first will be a replacement of current technology with clean energy hardware. The second option will be to manage data centre environments through resiliency software.

Microsoft’s Chief Environmental Officer Lucas Joppa recently declared on the Microsoft blog, "While diesel fuel accounts for less than 1% of our overall emissions, we believe it’s important to help accelerate the global transition away from fossil fuels. We’re charting a new course using low-carbon fuel sources, including hydrogen and energy storage.”

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Jun 15, 2021

Sustainability and PUE reduction in data centres

2 min
As green data centre design becomes mission critical, rigid evaporative media can be the key to reducing your PUE and increasing your sustainability. 

The data centre industry is at a crossroads. As demand for colocation, hyperscale cloud, and edge solutions continues to rise, operators and enterprises are also facing up to the reality that sustainable design and operating practice are a mission critical component of the modern data centre. Going green is no longer an optional extra.

Data centres are becoming an increasingly critical foundation that underpins the modern world, and the demand for them continues to grow exponentially each year. Data centres must remain in constant operation in order to provide the services for which customers depend on them. 

This mission critical need, combined with the sector-wide push towards reduced energy consumption and carbon footprint throughout the industry, is making the search for innovative evaporative media solutions that keep systems running at peak efficiency an equally mission critical priority.

The two main sources of energy consumption in a modern data centre are its IT equipment and the cooling infrastructure used to keep that equipment cool. A 2017 study found that energy consumption as the direct result of cooling data centre IT equipment can amount to over 40% of the total energy consumption in a facility. From air cooling to liquid and evaporative chillers, data centre operators, finding the right cooling solution for your facility is a top-of-mind goal for any data centre operator. 

Courtesy of Portacool
Courtesy of Portacool

Portacool: keeping it Kuul 

Based in Center, Texas, Portacool is a portable evaporative cooling solutions firm that has been pushing the boundaries of mission critical infrastructure cooling technology since it entered the market in 1990. 

Through constant embodiment of its five brand pillars - Safety & Liability, Total Cost of Ownership, Productivity & Performance, Sustainability & Social Responsibility, and Life & Comfort Enhancing Solutions - Portacool has grown steadily over the past 30 years, continually reinforcing its reputation for industry-leading cooling solutions. 

Portacool’s solutions have been successfully applied throughout the agricultural and horticultural, manufacturing, industrial, business, entertainment, sports, home, and hobby industries - “anywhere cooling is needed and traditional air conditioning is impractical or cost prohibitive.” 

The company’s sub-brand, Kuul, is Portacool’s answer to the growing need for reliable, sustainable cooling solutions in the data centre sector. Portacool manufactures three series of evaporative media – Kuul Control, Kuul Vitality and Kuul Comfort. Kuul Control is used in data centres, power generation and HVAC systems. Kuul Vitality is utilised primarily in the horticulture, poultry and swine industries. Kuul Comfort is exclusively made for usage in Portacool-branded portable evaporative coolers.

Kuul can help data centre operators lower their PUE dramatically, increasing the environmental sustainability of their facilities significantly as a result of its rigid evaporative media solutions. 

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