Liquid cooling technology efficiently absorbs heat from high-power electronics using dielectric fluids, replacing traditional air cooling. Driven by indigenous innovations, it supports India's expanding AI data centres and EV sectors while drastically reducing emissions, energy costs, and water consumption.
Why In News?
The Indian Institute of Technology (IIT) Gandhinagar secured a ₹20 lakh grant to develop "Advanced Chill Tech", India's first indigenous liquid cold plate technology.
What is Liquid Cooling Technology?
It is a thermal management technology that utilizes non-conductive liquids to absorb and transfer heat away from electronic systems, batteries, and computing infrastructure directly at the source.
Rapid growth in electric vehicles (EVs), artificial intelligence (AI), and data centres increases demand for cooling solutions that surpass traditional air-cooling systems, which struggle as modern AI deployments exceed 100 kilowatts (kW) per rack.
Objectives:
Liquid Cooling Mechanisms
Why is Liquid Cooling Technology Important?
Supports Electric Mobility: Effective thermal management prevents electrical hazards in high-density EV batteries, with liquid-cooled Battery Thermal Management System (BTMS) extending the life of 300 kWh lithium-ion batteries.
Enables AI Infrastructure Expansion: Liquid immersion cooling becomes mandatory for scaling modern AI data halls as moving air fails to handle the extreme heat density of high-power computing.
Enhances Data Centre Efficiency: This technology removes the need for traditional designs utilizing raised floors, massive overhead air distribution, and Computer Room Air Handlers (CRAH).
Reduces Energy Consumption: Transitioning to cold plates and immersion cooling cuts energy use by 15–20% compared to traditional air-based cooling.
Strengthens Technological Self-Reliance: Developing indigenous techniques, such as Friction Stir Channelling (FSC), replaces expensive imported technologies and anchors the Make in India and Atmanirbhar Bharat missions.
Promotes Water Conservation: Advanced liquid cooling cuts data centre water use by 31–52%, ensuring sustainable infrastructure expansion during global water scarcity.
What are the Key Features of Liquid Cooling Technology?
Superior Heat Transfer Capability: Liquid possesses higher thermal conductivity, transferring heat thousands of times better than forced air.
Lower Energy Requirements: The system eliminates energy-hungry mechanical server fans, transferring the cooling workload to highly efficient fluid pumps and external heat rejection loops.
Compact Design: This allows for tighter packing of microchips and vertically mounted server blades, drastically reducing the physical footprint of data centres.
Enhanced System Stability: The technology maintains uniform temperatures across electronic components, preventing "hot spots" and guaranteeing identical cooling conditions for every processor.
Improved Thermal Performance: Specialized dielectric fluids safely surround electrical components without causing short circuits, ensuring maximum thermal extraction.
Advanced Manufacturing Techniques: Indigenous innovations utilize Friction Stir Channelling (FSC) to plastically deform a single metal plate to create internal channels without melting, replacing highly defective vacuum brazing processes.
Benefits of Liquid Cooling Technology
Better Battery Performance: Regulates battery temperature in heavy-duty environments, enabling constant operation and maximizing output from permanent magnet synchronous motors.
Reduced Operational Costs: EVs integrating this technology witness 60–70% savings in energy costs and a 40–60% reduction in overall operating costs.
Higher Computing Efficiency: Allows processors to run at maximum workloads consistently without thermal throttling, maintaining high signal speeds.
Improved Reliability of Electronic Systems: New solid-state manufacturing processes create 100% leak-proof cold plates that withstand structural pressures exceeding 35 bar.
Lower Carbon Footprint: Advanced liquid cooling methods cut global ICT emissions by 15–21%, helping the sector target a 42% emission reduction by 2030.
Quieter Operations: Submerging servers entirely removes component fans, transforming deafening data centres into silent industrial facilities.
Source: INDIANEXPRESS
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PRACTICE QUESTION Q. Consider the following statements regarding Liquid Cooling Technology: 1. Two-phase immersion cooling requires large internal mechanical pumps to circulate fluid over the servers. 2. Cold plate technology can reduce data centre water usage by over 30% compared to traditional air cooling. 3. Conventional commercial liquid cold plates in India are primarily manufactured using Friction Stir Channelling (FSC). Which of the statements given above is/are correct? A) 1 and 3 only B) 2 only C) 2 and 3 only D) 1, 2, and 3 Answer: B Explanation: Statement 1 is incorrect: Two-phase immersion cooling operates using a closed-loop phase-change mechanism. The dielectric fluid boils at a low temperature, vaporizes to absorb heat, rises to an internal condenser, and drips back down due to gravity. This passive cycle does not rely on large internal mechanical pumps to circulate fluid over the components. Statement 2 is correct: Implementing direct-to-chip cold plate technology eliminates or dramatically minimizes the reliance on evaporative cooling towers. This configuration reduces data center water consumption by over 30% (and in closed-loop systems, up to 100%) compared to traditional air-chilled cooling methods. Statement 3 is incorrect: Conventional commercial liquid cold plates are traditionally manufactured using vacuum brazing or friction stir welding (FSW). Friction Stir Channelling (FSC) is an emerging, next-generation manufacturing alternative newly introduced in India (pioneered by labs like IIT Gandhinagar) but is not yet the conventional method used for commercial products. |
Liquid cooling is a thermal management method that uses non-conductive dielectric liquids—either through direct immersion or closed cold plates—to rapidly absorb and remove heat from electronic systems, batteries, and processors, acting thousands of times more efficiently than air.
High-capacity EV batteries require strict temperature regulation to prevent thermal runaway, ensure safety, and maximize output. Liquid-cooled Battery Thermal Management Systems (BTMS) ensure uniform cooling, significantly extending battery lifespan and reducing operational costs.
Modern AI workloads push server racks to consume beyond 100 kW of power, generating heat that air systems cannot dissipate. Liquid immersion cooling handles this extreme density, preventing chip throttling, reducing physical footprints, and cutting data centre energy usage.
It provides superior heat transfer, eliminates the need for power-hungry mechanical fans, slashes noise levels, reduces energy consumption by 15-20%, and lowers water usage by 31-52%, establishing a much lower carbon footprint for intensive computing facilities.
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