Embodiments disclosed include a heat exchange apparatus comprising an equipment-side coolant circuit configured for fluid communication with a first coolant compartment via a first coolant in-flow and out-flow valve. The embodiment further comprises a second coolant compartment operatively coupled to the first coolant compartment and comprising a second coolant in-flow and out-flow valve in fluid communication with a coolant supply source. The first coolant compartment is calibrated to receive hot coolant via the first coolant in-flow valve from a heat transfer element comprised in the equipment side coolant circuit line coupled to a heat generating source and in fluid communication with the first coolant in-flow valve, and the first coolant out-flow valve is calibrated to return the coolant to the heat transfer element comprised in the equipment side coolant circuit line. The second coolant compartment is calibrated to receive cold coolant from the coolant supply source via the second coolant in-flow valve and to return the received cold coolant to the coolant supply source via the second coolant out-flow valve in an open-loop coolant circuit line.
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