Thermal Management Under Seasonal Extremes: Airflow vs. Dielectric Immersion

The Korean peninsula presents a challenging climate profile for high-density compute facilities. Winter temperatures frequently drop below -12°C in northern Gyeonggi-do, while summer monsoons bring sustained 34°C temperatures with relative humidity exceeding 85%. Operating continuous thermal loads of 3.5 kW per machine across these extremes demands deliberate thermal architecture.

The Limits of Evaporative Airflow in Humid Monsoon Seasons

Evaporative wet-wall cooling relies on wet-bulb depression—the difference between dry ambient air temperature and saturated wet-bulb temperature. During July and August in the Seoul-Incheon corridor, the wet-bulb temperature often exceeds 27°C, limiting evaporative cooling delta to less than 2°C.

If airflow velocity is insufficient, ASIC chips quickly exceed their critical 85°C junction temperature, triggering automated thermal throttling and lost hash productivity. Furthermore, excessive moisture intake risks condensation on cold startup cycles.

Single-Phase Synthetic Fluid Immersion as a Year-Round Solution

Immersion cooling submerges operational hashboards in non-conductive synthetic hydrocarbon fluids. Because the fluid possesses over 1,000 times the heat capacity of air per unit volume, heat is immediately transferred away from the silicon into external dry-cooler loops.

While immersion entails higher initial capital outlay (approximately ₩350,000 per slot in tank and plumbing hardware), it eliminates fan noise, prevents particulate contamination, enables 20-30% chip overclocking at reduced junction temperatures, and delivers year-round thermal stability.