Abstract: A cooling system is disclosed for a server rack holding one or more servers. The cooling system includes a cooling module configured to condition coolant to provide cooling within the server rack. The cooling system further includes at least one evaporator configured to couple to an upstream side of the server rack, relative to airflow through the server rack, and cool the airflow flowing into the server rack with the coolant. The cooling system further includes at least one condenser configured to couple to a downstream side of the server rack, relative to the airflow through the server rack, and cool the coolant after the coolant passes through the at least one evaporator.

Abstract: A cooling system is disclosed for a server rack holding one or more servers. The cooling system includes a cooling module configured to condition coolant to provide cooling within the server rack. The cooling system further includes at least one evaporator configured to couple to an upstream side of the server rack, relative to airflow through the server rack, and cool the airflow flowing into the server rack with the coolant. The cooling system further includes at least one condenser configured to couple to a downstream side of the server rack, relative to the airflow through the server rack, and cool the coolant after the coolant passes through the at least one evaporator.

Abstract: A cooling fan assembly is provided which includes a fan housing and an axial fan. The fan housing has a shroud panel with cutout portions along the airflow path of the axial fan. Fixed members separate the cutout portions. Flap members are attached to the fixed members so that the flap members can pivot between an open position and a closed position. The flap members are pushed by airflow from the axial fan into an open position when the fan is operational. When the fan is non-operational or when air begins to enter the fan in the reverse direction of the axial fan's airflow path, the flap members are configured to move to a closed position. In the closed position, air cannot flow through the reverse direction of the axial fan's airflow path.