What is the Asperitas Direct Forced Convection tank?
This tank is the pumped counterpart to the passive Asperitas system. Earlier Asperitas designs moved fluid by natural convection alone. Direct forced convection adds a pump so fluid is driven past the components, which raises the heat a given volume can carry. Asperitas states 60 kW of cooling per tank across 12U of immersed compartment, beyond 3.6 kW per immersed unit, and up to 2,000 W per socket. It also states a 44 kW electrical capacity. The two numbers answer different questions: one is the heat the tank can move, the other is the power it can deliver to the hardware inside, and a site is limited by whichever it reaches first. The unit measures 600 by 1,215 by 1,990 mm and weighs about 1,120 kg once loaded with hardware and fluid. Published material does not give the facility-water temperature the 60 kW rating assumes, the approach temperature, the flow through the tank, the fluid type and volume, or the pump's power draw. Nor does it state which servers carry a warranty when immersed. Ask for a selection at the site's own water temperature, the fluid specification and its replacement interval, the drain and service procedure for a single node, and written confirmation from the server vendor that immersion does not void support.