The global data center cooling market is projected to expand from $13.23 billion this year to $37.62 billion by 2033, a 16.1% average annual growth rate, as AI and cloud services drive higher power consumption and server loads. High-performance GPUs generate heat at densities that air cooling increasingly struggles to manage: conventional air systems typically handle 20–40 kilowatts per rack, while racks using NVIDIA’s next-generation Vera Rubin GPU reach 230 kilowatts. Liquid cooling, including direct-to-chip cooling (attaching a water-filled cold plate to the chip), can recover 65–75% of the heat produced by GPUs and neural processing units. Because memory, networking and other components still generate heat, liquid-cooled AI data centers generally operate as hybrid systems that also use air. Immersion cooling, which submerges entire servers in specialized liquid, is being considered for facilities where rack consumption exceeds 1 megawatt, although liquid costs and equipment maintenance remain obstacles. LG CNS, Elice Group and NVIDIA are pursuing different liquid-cooling approaches, while Samil PwC says thermal management is becoming as important to AI infrastructure competitiveness as securing GPUs.