The jump in AI rack power density
A conventional data centre rack draws 5–15kW, while a rack-scale AI server such as the NVIDIA GB200 NVL72 exceeds 100kW per rack, with next-generation platforms moving beyond 200kW. During data center commissioning, the power chain (transformers, UPS, busway, PDUs) and the cooling chain (cold plates, CDUs, chilled water) must both be proven at full design load before any server is installed — and that requires a test load.
Where air-cooled load banks hit their limit
An air-cooled load bank converts every kilowatt it absorbs into hot air inside the hall. A 100kW load is 100kW of extra heat the hall cooling must absorb — yet during commissioning the cooling plant is often not fully operational. Fan noise above 75dB per unit also makes sustained work impossible when several units run in parallel. Together these limit air-cooled units to the lower power range in high-density AI hall commissioning.
How a liquid cooled load bank works
A liquid cooled load bank transfers the heat from its resistor elements directly into a coolant loop (deionised water or glycol), carrying the heat out of the building through the hall's chilled-water circuit. A single 19-inch rack-mounted unit covers 10–100kW at noise levels below 40dB, and units can be paralleled to load rack by rack, row by row, and hall by hall — reproducing the electrical and thermal behaviour of GB200-class AI racks precisely. LANDI's rack-mounted liquid cooled load bank is designed for exactly this scenario, with remote network control and automatic report archiving.
Three checks when specifying
First, confirm the load covers the voltage and supply type of the chain under test (commonly AC 400–480V or a DC bus). Second, confirm the coolant connections match the CDU or chilled-water pipework on flow rate, pressure drop and fitting standard. Third, confirm the controller supports scripted load profiles and data logging, because the commissioning report becomes part of the acceptance documentation.
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