Liquid-assisted air cooling of electronic racks with modular fan and heat exchangers

A data center system, comprising:

• an array of electronic racks, each of the electronic racks including
• a stack of one or more information technology (IT) components disposed therein to form a frontend and a backend of the electronic rack,
• a fan unit detachably mounted on the backend of the electronic rack, the fan unit generating an air flow flowing from the frontend to the backend past through an air space of the stack of IT components to reduce a temperature of the IT components, and
• a heat exchange unit detachably mounted on the backend of the electronic rack to exchange heat generated from the IT components, the heat exchange unit having one or more tubes forming a heat exchange screen, wherein the one or more tubes allow a cool liquid to travel therein to exchange the heat carried by the air flow past through the heat exchange screen, wherein the fan unit comprises a plurality of fan modules, and wherein the heat exchange unit comprises a plurality of heat exchange modules. each heat exchange module corresponding to one of the fan modules, wherein each heat exchange module is mounted on a heat exchange frame, wherein each fan module includes a pair of clamps to attach the fan module onto the heat exchange module by clamping onto the heat exchange frame to form a cooling module, and wherein the cooling module is then mounted onto the backend of the electronic rack.