RACK‐LEVEL COOLING AND SERVER‐LEVEL COOLING

This chapter provides a brief introduction to rack‐level cooling and server‐level cooling as applied to information technology (IT) equipment support. At rack‐level cooling, the cooling unit is closer to heat source (IT equipment). And at server‐level cooling, the coolant is close to heat source. The chapter introduces various cooling types from remote to close to heat source. In each type, the principle, pros, and cons are discussed. Server‐level cooling is generally studied by IT equipment suppliers. Air cooling is still a traditional and mature technology. Two common ways of liquid cooling is discussed, cold plate and immersion cooling. Immersion liquid cooling technology mainly uses specific coolant as the heat dissipation medium to immerse IT equipment directly in the coolant and remove heat during the operation of IT equipment through the coolant circulation.