SZPJ is committed to promoting the application of phase change material technology in the civilian field, and has achieved technological achievements in thermal energy storage and thermal management.
Phase change materials are a type of thermal management material with special properties, which can undergo phase change during temperature changes, thereby releasing or absorbing a large amount of heat to maintain a consistent temperature.
Phase change materials were initially developed by NASA in 1950 for thermal control in outer space, and this material is also considered one of the most promising green technologies currently available.
In the field of thermal energy storage, the current global demand for energy storage is growing rapidly, with thermal energy accounting for 40% -50% of the energy structure. Phase change materials, due to their high energy density, can provide more efficient and economical solutions for heat and cold storage needs in household, commercial, and industrial scenarios.
SZPJ has developed high thermal conductivity all solid phase change materials based on graphite shaping technology in the field of thermal storage.
This technology mainly utilizes the unique micro nano cavity structure of graphite, as well as its high strength and good toughness, to effectively “lock” phase change materials in the cavity. Therefore, even in the event of multiple phase transitions, it can greatly avoid filler loss and skeleton damage, ultimately ensuring the stability of product performance.
At the same time, utilizing the ultra-high thermal conductivity of graphite (300-1900W/mK), it promotes the rapid and uniform transfer of heat from the heat source to the phase change materials filled in micro/nano cavity structures, achieving efficient heat storage, improving the overall thermal response rate of the product, and ultimately achieving fast energy charging and discharging.
Compared with other inorganic phase change materials, the high thermal conductivity all solid phase change material developed by SZPJ can achieve a thermal conductivity of 20W/(m · K) and 20000 cycles. Under the same conditions, it is expected to increase the cold storage effect by 9 times and the heat storage effect by 5 times.
In the field of thermal management, with the rapid development of artificial intelligence (AI) technology, the demand for large computing power in data centers is also growing exponentially. To ensure efficient operation of data centers while maintaining the stability and lifespan of their hardware equipment, temperature control has become crucial. However, the current cooling system is no longer able to meet the temperature control requirements of future artificial intelligence computing power for data centers, and there is an urgent need for more efficient cooling and temperature control technology solutions.
The current phase change microcapsules in the thermal management market belong to the micrometer scale, which are prone to problems such as large particle size, difficulty in precise control, low core material content, easy precipitation, and uneven distribution, making them unsuitable for liquid cooling systems.
In line with the development trend of big data and artificial intelligence, SZPJ has pioneered the application of nano phase change microcapsules in cooling liquids. The innovative jet MOF catalytic transient polymerization technology developed by SZPJ has achieved low-cost and stable mass production of nanoscale phase change microcapsules.
This technology mainly solves the problem of re bonding and enlargement of dispersed nanoscale particles, achieving material nanomaterialization, ultimately achieving uniform particle size distribution, and reducing waste generation. The nano level phase change microcapsules produced based on this process have a particle size of less than 200nm, which can achieve uniform distribution in the liquid, effectively improving the heat transfer performance of the original cooling liquid by two to three times, increasing the total heat transfer amount in an effective volume space, reducing pump power consumption and heat transfer to achieve system energy savings of 25-30%, thereby reducing carbon emissions.
Application scenarios
Nanophase change microcapsules can not only be used for data center liquid cooling, but also for electric vehicle liquid cooling, energy storage battery liquid cooling, spacecraft liquid cooling…