Changjiang Securities·2025-08-21 14:41Investment Rating - The report maintains a "Positive" investment rating for the industry [12] Core Insights - The cooling methods for data centers are transitioning from air cooling to liquid cooling due to the increasing power consumption of chips and single cabinets. Liquid cooling technologies offer significant advantages such as higher cooling efficiency, lower energy consumption, and reduced total cost of ownership (TCO) [6][19] - The report highlights the growth of liquid cooling solutions, particularly single-phase cold plate cooling, which currently accounts for over 90% of liquid cooling applications in data centers. The technology is maturing, and small-scale commercial applications are being promoted [6][19] - The report suggests that various cooling media will emerge as opportunities in the liquid cooling market, with a focus on companies involved in the production of these cooling liquids [10][52] Summary by Sections Data Center Cooling Transition - The report discusses the shift to liquid cooling as a response to the rising power density of chips, particularly in AI servers, which are pushing the limits of traditional air cooling methods. The maximum power density for traditional air-cooled cabinets is around 20 kW, while future designs may reach up to 600 kW [7][25][29] Cooling Media Opportunities - Different cooling media are being explored for single-phase and two-phase cooling solutions. For single-phase cooling, common media include ethylene glycol solutions and propylene glycol solutions, while two-phase solutions primarily use refrigerants and low-boiling point fluids [8][41] - The report emphasizes the need for cooling liquids that meet specific technical requirements, such as excellent insulation properties, low surface tension, and high thermal conductivity [9][42] Investment Recommendations - The report recommends focusing on companies involved in the liquid cooling media industry, including: - Juhua Co., Ltd. (fluorinated liquids + refrigerants) - Sinoma Science & Technology (fluorinated liquids) - Yonghe Technology (fluorinated liquids + refrigerants) - Haohua Technology (fluorinated liquids + refrigerants) - Sanmei Co., Ltd. (refrigerants) - Xin'an Chemical (silicone oil) - Xingfa Group (silicone oil) [10][52]