Server Immersion Cooling   04/08/2021

Maybe you know what is Moore’s Law which is observation and projection that doubling the component per intergraded circuit, named after the co-founder of Intel. In fact, the semiconductor advancement has slowed and below the pace predicted by Moore’s Law nowadays, because the transistor scaling has been reached the physical limits of miniaturization at atomic levels. An alternative source of improved performance is in microarchitecture techniques exploiting the growth of available transistor count.

Processor makers delivered increases in clock rates and instruction-level parallelism, so that single-threaded code executed faster on newer processors. Management of CPU power dissipation, without overheating, is a major consideration of nearly all CPU manufacturers to date. The total power consumed by data center at China in 2018 was 1608.89TW⋅h which is 2.35% of total municipal power consumption of China in 2018, also excessed the total municipal power consumption of Shanghai in the same year. The electrical power consumption is already taken 60% of operating cost of a data center.

Microsoft are making liquid boil inside a steel holding tank packed with computer servers at a datacenter recently to test an alternative server cooling material. Unlike water, the fluid inside the couch-shaped tank is harmless to electronic equipment and engineered to boil at 122 degrees Fahrenheit, 90 degrees lower than the boiling point of water. The boiling effect, which is generated by the work the servers are doing, carries heat away from laboring computer processors that power consumption has reduced 5-15%.




In general, there are two main server cooling categories which are air cooling and liquid immersive cooling. Immersion cooling has becoming a popular server cooling solution, it allows operators to drastically reduce their energy usage through the elimination of the expensive air cooling infrastructure.

Benefit of immersion cooling
Save 70% space
Save 30% power consumption
Reduce failure rate
Reduce noise

Liquid immersion cooling method can increase the density of servers, 20 units of servers is required 3-4 sets cooling tank only. Air cooling is required to install cooling fan and reserves runner for air flow. Liquid immersion cooling is a more effective method than air cooling, meanwhile, the coolant is harmless to electronic components and environment, and stable.


Application


Applied Temp.: -80°C～150°C
Max. Head: 120m
Max. Capacity: 1,300 L/min
Power: 0.09 ~ 15kW
Main Material: SUS304/SUS316
Bearing: SiC/SiC-D
O-Ring: PTFE，EPDM


IWAKI SANWA metallic centrifugal pumps dominate the dielectric liquid immersion cooling market in Japan.

Key Feature of IWAKI SANWA metallic centrifugal pumps:
Magnetic driven
Metallic pumps head
Unique SiC-D bearing material

The potential growth rate of data center market is very high because the coming 5G infrastructure. There are 5 world-scale data centers would be built at Huizhou, China in 2020. United Nation is also going to build a big data research institution in Guangzhou, China.


The power consumption of data center in China would be increase 66% in 2023. It can forecast that the demand of immersion cooling system is potentially great.