Why in the News?

A groundbreaking study by Microsoft and WSP Global, published in Nature, shows major progress in making data centres more environmentally friendly.

What are the environmental benefits of using cold plates and immersion cooling in data centres?

• Lower Greenhouse Gas Emissions: These methods reduce emissions by 15–21% compared to traditional air cooling. Eg: Microsoft’s study showed that using immersion cooling in their data centres significantly reduced carbon emissions during peak operations.
• Reduced Energy Consumption: They use 15–20% less energy, as liquid coolants transfer heat more efficiently than air. Eg: Alibaba’s deployment of cold plate cooling led to lower power usage effectiveness (PUE), cutting energy bills and environmental impact.
• Significant Water Conservation: Water usage drops by 31–52%, helping conserve freshwater resources Eg: In water-stressed regions like Arizona, using cold plate cooling helps tech firms operate data centres without heavy reliance on water-based air conditioning systems.

How does life cycle assessment aid in evaluating cooling technologies?

• Measures Full Environmental Impact (Cradle to Grave): LCA evaluates emissions, energy use, and water consumption across a product’s entire lifecycle — from manufacturing to disposal. Eg: The Microsoft-WSP study assessed cold plates and immersion cooling from production to end-of-life, revealing their overall environmental benefits.
• Identifies Trade-offs Between Technologies: LCA highlights sustainability trade-offs, helping compare the true impact of different cooling methods. Eg: It showed that while immersion cooling reduces emissions, the type of coolant used may raise separate ecological concerns.
• Supports Informed Decision-Making for Climate Goals: LCA provides data-driven insights for industry and policymakers to adopt greener technologies that align with emissions targets. Eg: The ICT sector can use LCA results to choose cooling systems that help cut emissions by 42% by 2030, as per global climate goals.

Why is renewable energy essential for sustainable data centre cooling?

• Drastically Reduces Carbon Emissions: Using renewable energy like solar or wind can cut emissions by 85–90%, regardless of the cooling technology used. Eg: A data centre powered by wind energy in Sweden showed near-zero emissions even with traditional air cooling.
• Enhances the Impact of Green Cooling Technologies: When combined with cold plates or immersion cooling, renewables amplify environmental benefits by further lowering energy and water use. Eg: The Microsoft-WSP study found that with 100% renewables, water savings could increase up to 50%.
• Ensures True Sustainability Across the System: Cooling innovations alone aren’t enough if the electricity source is polluting; renewables make the entire system eco-friendly. Eg: A server cooled efficiently but powered by coal-based electricity still carries a high carbon footprint.

In what ways are liquid-cooling methods superior to air cooling?

• Higher Cooling Efficiency and Performance: Liquid-cooling systems like cold plates and immersion cooling transfer heat more efficiently than air, reducing the risk of overheating and improving hardware performance. Eg: In Microsoft’s data centres, cold plate cooling reduced component temperatures significantly compared to air-cooled setups, boosting system reliability.
• Lower Energy and Water Consumption: Liquid methods use 15–20% less energy and up to 52% less water, making them more sustainable and cost-effective in the long run. Eg: Alibaba’s immersion-cooled servers showed reduced electricity bills and water usage in high-demand operations.

To what extent can cooling innovations help meet ICT emission targets by 2030?

• Significant Reduction in Greenhouse Gas Emissions: Advanced cooling technologies like cold plates and immersion cooling can reduce ICT data centre emissions by 15–21%, directly contributing to the 42% emission cut target set for 2030 (from 2015 levels). Eg: Microsoft’s deployment of cold plate systems showed measurable emissions drops in large-scale data operations.
• Supports Scalable, Energy-Efficient Data Centre Growth: As demand for cloud services increases, liquid cooling enables high-performance computing without a corresponding rise in energy and carbon footprint, helping the sector scale sustainably. Eg: Alibaba’s use of immersion cooling enabled expansion of AI and cloud infrastructure while keeping energy use in check.

Way forward: 

• Promote Policy Incentives for Green Cooling Technologies: Governments should provide tax breaks, capital subsidies, and faster approvals for data centres that adopt liquid-cooling systems and renewable energy integration. Eg: Extending schemes like India’s PLI (Production-Linked Incentive) to green tech in data centres can fast-track low-emission infrastructure adoption.
• Mandate Life Cycle Assessments and Emission Reporting: Introduce mandatory Life Cycle Assessments (LCA) and carbon disclosure norms for large-scale data centres to encourage transparent, science-based decisions. Eg: Requiring firms to report environmental impact from cooling systems can guide smarter industry shifts aligned with ICT sector’s 2030 emission targets.

Mains PYQ:

[UPSC 2022] How will India achieve the target of 50% of its installed capacity from renewable energy by 2030? Justify your answer. How will the shift of subsidies from fossil fuels to renewables help achieve the above objective? Explain.

Linkage: Switching to renewable energy is a more effective way for the tech industry to run energy-hungry data centers in a cleaner, more sustainable way. This helps them meet climate goals and support national environmental targets.

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