Did you know that the average data center consumes around 68,000 liters of water each day? As our digital world expands, the pressure on this precious resource is mounting, making water sustainability a critical concern for the industry. With data centers in the U.S. alone consuming approximately 1.7 billion liters daily—equivalent to nearly half a billion showers—the need for sustainable practices has never been more urgent.
The topic of water-smart data centers is so rich, and crucial, that it deserves detailed exploration. To provide you with the most value, we’ve divided this discussion into two parts. In this first article, we’ll first explore the challenges associated with water use in data centers, examine current cooling technologies and their impact on water consumption, and outline best practices for conservation. In the second part, we’ll dive into innovative solutions that can help MSPs transition toward more sustainable operations.
By implementing effective water management strategies alongside circular IT solutions, your company can significantly enhance its environmental footprint while saving money on cooling and infrastructure. What more can you ask for?
Digital drought?
The reality is stark: data centers are major consumers of water. In the U.S. alone, they consume approximately 1.7 billion liters daily—an amount equivalent to nearly half a billion showers! This massive consumption is compounded by global challenges such as droughts and declining water tables. Regions like the Western U.S. and parts of Europe are experiencing severe water shortages, leading to increased competition for this vital resource among agriculture, urban development, and IT.
As the demand for data storage and processing continues to grow—especially with the rise of AI technologies—the pressure on water resources will only intensify. Companies like Google and Microsoft have reported significant increases in their water usage over recent years, prompting regulatory bodies to tighten restrictions on water consumption in data centers. For MSPs looking to thrive in this environment, addressing water sustainability is not just good practice; it’s essential for future growth.
What is cooling right now?
Cooling systems are at the heart of data center operations and are responsible for a significant portion of water usage. Let’s have a look at some common cooling technologies and examine their pros and cons.
Description: CRAC units use mechanical refrigeration to cool air in a data center. They work by circulating chilled air throughout the facility.
Pros:
- Effective at maintaining consistent temperatures.
- Widely understood and implemented in existing data center designs.
Cons:
- High energy consumption due to the need for continuous operation.
- Cold air dissipates throughout the room rather than targeting hot spots directly, leading to inefficiencies.
Description: CRAH units utilize fans and cooling coils with a water-based chiller system to remove heat. The fan blows air across chilled water coils, providing cool air to the equipment.
Pros:
- Effective heat removal and can be more efficient than CRAC systems.
- Can use outside air for cooling when conditions are favorable.
Cons:
- High power consumption, especially if the cooling tower is not optimized.
- Cooling towers lose water through evaporation, contributing to overall water usage.
Description: A more efficient form of evaporative cooling that uses fine mist to cool incoming air.
Pros:
- Uses less water compared to traditional evaporative systems.
- Lowers energy usage while effectively managing temperatures.
Cons:
- Water is still lost due to evaporation and drainage.
- Requires careful management to maintain optimal humidity levels.
Description: This method uses large fans to draw warm air through wet absorbent-material pads. As water evaporates from the pads, the air temperature drops.
Pros:
- Lower energy use compared to traditional CRAC and CRAH systems.
- It is particularly effective in dry climates where humidity is low.
Cons:
- Requires a steady supply of clean water, which can be a limitation in water-scarce regions.
- Water loss occurs through evaporation, which can offset some efficiency gains.
Description: Economizers utilize outside air for cooling whenever possible, significantly reducing energy consumption without needing water for operation.
Pros:
- It can eliminate the need for water-based cooling for up to 95% of the year in suitable climates.
- Reduces reliance on mechanical cooling systems, lowering energy costs.
Cons:
- Effectiveness is highly dependent on local climate conditions.
- Typically it serves as a supplement rather than a complete replacement for other cooling methods.
Description: These systems operate without cooling towers and use a closed-loop design that avoids the need for make-up water.
Pros:
- Eliminates the need for water in cooling processes.
- Generally easier to maintain than water-cooled systems.
Cons:
- Lower cooling efficiency compared to traditional chillers that use water.
- May require more energy to achieve desired temperatures, impacting overall sustainability.
Description: These systems enclose racks in metal or plastic barriers, directing cool air specifically into the racks rather than dispersing it throughout the entire space.
Pros:
- Increases cooling efficiency by ensuring that cold air reaches hot spots directly.
- Reduces overall energy consumption by minimizing wasted cool air.
Cons:
- Higher initial installation costs due to infrastructure changes.
- Requires ongoing maintenance to ensure effectiveness.
Description: This technology circulates a cool liquid directly through plates in contact with CPUs and other hot components, replacing traditional air-cooling methods.
Pros:
- Highly efficient heat removal; faster than conventional methods.
- Reduces reliance on water by using dielectric fluids instead.
Cons:
- High initial costs and complexity of installation.
- Risk of leakage and environmental concerns regarding some dielectric fluids used.
Description: Servers or entire racks are submerged in a non-conductive liquid that removes heat through direct contact with the liquid.
Pros:
- Orders of magnitude are more effective at heat removal than air-based systems.
- Significantly reduces reliance on traditional cooling methods that consume large amounts of water.
Cons:
- High costs associated with setup and maintenance.
- Potential issues with rust, safety, and leakage that require careful management.
Less water, more efficiency
As data centers face increasing scrutiny over their water consumption, implementing effective water conservation and sustainability practices is essential. Here are several strategies that data centers can adopt to help reduce water consumption and enhance operational efficiency while maintaining positive engagement with local government and communities.
- Monitor Water Consumption
Less than one-third of data centers actively measure their water consumption. By implementing monitoring systems, data centers can gain visibility into their water usage patterns, identify areas of waste, and make informed decisions about conservation efforts. Regular audits (assessing both operational practices and equipment efficiency) and real-time monitoring can help track progress and highlight opportunities for improvement.
- Use the Water Usage Effectiveness (WUE) metric
The WUE metric is a critical tool for assessing data center water efficiency. It measures the amount of water consumed per unit of IT power used, typically expressed in liters per kilowatt-hour (L/kWh). By employing the WUE metric, data center operators can identify areas of excessive water use and implement targeted strategies for improvement. This metric not only helps with benchmarking performance against industry standards but also supports regulatory compliance and sustainability goals.
- Be Transparent
Adopting a policy of transparency regarding water usage can foster trust with local communities and stakeholders. Data centers should communicate their efforts to reduce water consumption and increase efficiency, engaging with local authorities and residents to demonstrate accountability. This proactive approach can mitigate potential pushback against data center expansions or operations.
- Get Educated
It is crucial to stay informed about the latest trends in water sustainability. Data center professionals should attend industry events, join relevant associations, and participate in initiatives focused on promoting sustainable practices. Networking with peers can provide valuable insights into effective strategies and technologies that have been successfully implemented in other facilities.
- Investigate New Cooling Options
AFCOM’s State of the Data Center 2024 report highlights that while many data centers are focused on improving airflow and containment, only a small percentage have adopted liquid cooling or other innovative cooling technologies. Data centers should explore new cooling options that use little or no water, evaluating them based on cost, power requirements, and potential water savings. Pilot programs can be beneficial for testing various cooling solutions while keeping Power Usage Effectiveness (PUE) low. We will also delve into this topic in our follow up piece.
- Implement Waterless Cooling Solutions
Exploring options like air-cooled chillers that utilize closed-loop designs can help avoid reliance on make-up water entirely while maintaining effective cooling efficiency. These systems represent a significant step forward in reducing dependence on water resources.
- Engage in Community Partnerships
Collaborating with local communities on sustainability initiatives can enhance a data center’s reputation while contributing positively to regional water conservation efforts. Engaging in community projects related to environmental stewardship can build goodwill and strengthen relationships with stakeholders.
- Set Clear Sustainability Goals
Establishing measurable sustainability goals related to water usage can drive accountability within the organization. Data centers should set targets for reducing water consumption over time and regularly report progress to stakeholders.
Conclusion
Water sustainability is no longer an optional consideration for data centers; it’s a necessity driven by environmental pressures and regulatory demands. By combining circular IT solutions with effective water management strategies, your company can significantly enhance its ecological footprint while also realizing substantial cost savings on cooling and infrastructure.
As we continue exploring sustainability in data centers, stay tuned for the second part of our series, where we’ll delve into innovative cooling technologies that can further reduce water consumption and improve efficiency. Together, let’s pave the way for a more sustainable future in the data center industry!
Ready to take action? Please contact us with any questions or guidance you might need. We are always happy to help!
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