The Only Solution to Resolve Urban IDC Electromagnetic Field Issues

 Hello everyone, and welcome. The topic of today's lecture is the truth behind data center (IDC) electromagnetic fields (EMF), along with technical and social solutions for an issue that has recently surfaced as a national concern.


First, where within a data center are electromagnetic fields generated the most? Many people immediately think of the server racks in the computer room. However, the true primary sources are the switchboards, transformers, and Uninterruptible Power Supply (UPS) areas where massive amounts of extra-high voltage electricity enter the facility. In contrast, the servers themselves are housed in grounded metal chassis that act as Faraday cages, nearly completely blocking high-frequency EMF and electric fields.

The real issue lies in the 60 Hz extremely low frequency (ELF) magnetic fields passing through the power grid. A 60 Hz alternating current (AC) creates a structure where time-varying electric and magnetic fields continuously induce each other as they propagate through the air. While it operates at the same frequency as household appliances, an IDC concentrates thousands of amperes (A) of heavy current, generating extremely strong magnetic fields. Furthermore, these extremely low frequency magnetic fields easily penetrate ordinary metals, soil, and concrete as if they were not even there.

Therefore, the belief that "undergrounding high-voltage lines or transformers completely eliminates electromagnetic fields" is a misconception. Aerial transmission towers keep power lines elevated more than 20 meters high, resulting in significant field attenuation over distance. In contrast, underground cables are buried just 1.2 meters below our feet, meaning ground-level magnetic fields can actually measure higher than directly beneath an overhead transmission tower. However, undergrounding offers a clear advantage by dramatically compressing the horizontal reach of the magnetic field to within a few meters.

To resolve this, fields apply active cancellation technologies—where sensors detect magnetic fields in real time and emit inverse waveforms to neutralize over 80 to 90 percent of the field—or install specialized magnetic shielding materials such as silicon steel sheets and aluminum. Without additional shielding materials, achieving a target below 4 mG solely through burial depth would require digging down at least 8 to 12 meters.

Despite these advanced technologies, public complaints persist due to the vast gap between the operator's legal regulatory threshold (833 mG) and the residents' precautionary safety comfort level (4 mG), coupled with the involuntary imposition of risk and realistic worries about declining property values.

The optimal alternative to fundamentally resolve these EMF disputes is the introduction of Direct Current (DC) systems. Because DC has a frequency of 0 Hz, wave-form electromagnetic fields are fundamentally eliminated at the source, leaving behind only a harmless "static magnetic field" similar to Earth's natural magnetic field. DC data centers serve as a powerful key to the future, simultaneously maximizing power efficiency and mitigating EMF-related public opposition.

Presenting technical alternatives like cancellation systems and DC conversion based on accurate scientific truth, combined with genuine communication with local residents, is the vital key to navigating the data center era wisely. Thank you for listening.


#UrbanDataCenterEMF #IDCEMFSolutions #DataCenterTech #DirectCurrentIDC #SmartDataCenter


Location: 한국

Comments

Post a Comment

Popular posts from this blog

Introducing Gyeonggi Techno Park

Introducing Gyeonggi Techno Park, a source of pride for me. The South Korean government identified Silicon Valley as the driving force behind the Third Industrial Revolution in the United States and formulated a medium to long-term plan for strengthening the technological infrastructure in 1995. To foster regional-specific strategic projects and achieve national balanced development, it established a special law on supporting industrial technology complexes and designated regional technoparks in 1998. In Gyeonggi Province, six regions participated in a competition to attract technopark projects, among which the consortium backed by the national industrial complex Smart Hub, located in Ansan City, was selected as the operator of Gyeonggi Techno Park. Since its establishment in 1998, it has attracted government-funded projects to nurture bio, robotics, IT, and automotive small and medium-sized enterprises (SMEs). Simultaneously, it aimed to attract overseas global companies and national ...
Read more

Debt Escape Strategy

Image
 The economy is currently facing turbulent times, and many people are struggling. I am currently reading a book titled In the Next Five Years, Only Those Without Debt Will Survive . The term "credit" is one coined by the financial industry. A high credit score means a customer is highly profitable. Therefore, it can be said that "credit" and "debt" are essentially interchangeable terms. The credit cards we use in our daily lives can also be called debt cards. Using a credit card essentially means using debt based on credit, and if you're utilizing revolving services, you're essentially taking out a high-interest loan. No one embraces debt out of love. If a family member falls seriously ill, a parent's business encounters difficulties, or multiple issues converge, the burden of debt can extend to the children. Many families find themselves in such situations, overwhelmed by the weight of debt and facing threats to their survival. The worst-case ...
Read more

Must Life Have Meaning?

Image
 In 2015, I listened to a lecture by Professor Dae-Shik Kim from the Department of Electrical Engineering at KAIST. The first slide had the sentence: "Must life have meaning?" The lecture discussed how, as AI technology evolves, humans will face challenges from machines armed with AI. From the universe's perspective, the world is the master, and individuals are the subjects. Individuals are born into given environments, age, and eventually disappear. Why are humans destined to age and die? Professor Kim references the world's first novel, the Epic of Gilgamesh. Humans were granted an elixir of eternal youth by the gods but it was taken by a serpent. When they asked for another, the gods sharply refused. As a result, humans live their lives running their course like relay runners and then exit. Nature, the master, gave more energy and resilience to the young, while the elderly, deprived of reproductive power, are neglected. And so, the question resounds again like a sh...
Read more