Ground-based heat sink facilitating electronic system cooling

A cooling system comprising:

• a coolant loop;
• a ground-based heat sink controllably coupled to the coolant loop, the ground-based heat sink comprising:
• a housing including a compartment, a coolant inlet, and a coolant outlet, the housing being configured for a coolant to flow from the coolant inlet through the compartment to the coolant outlet, the coolant transferring heat extracted from one or more electronic components;
• and
• at least one heat pipe comprising a first portion disposed within the compartment of the housing, and a second portion disposed outside the housing, the at least one heat pipe being configured to extract heat from the coolant flowing through the compartment, and to transfer the extracted heat to the second portion disposed outside the housing, wherein the second portion of the at least one heat pipe outside the housing is configured to facilitate conducting the extracted heat into the ground;
• a heat rejection unit controllably coupled to the coolant loop, the heat rejection unit configured to reject heat from coolant passing therethrough to air passing across the heat rejection unit;
• a controller coupled to control flow of coolant within the coolant loop through the ground-based heat sink and through the heat rejection unit based, at least in part, on at least one monitored variable;
• wherein the ground-based heat sink and the heat rejection unit are controllably coupled to the coolant loop in series, the ground-based heat sink being coupled to the coolant loop upstream of the heat rejection unit and the coolant passes through the ground-based heat sink before passing through the heat rejection unit, and the controller is configured to automatically control flow of coolant within the coolant loop through the ground-based heat sink based, at least in part, on the at least one monitored variable, and to automatically control flow of coolant within the coolant loop through the heat rejection unit based, at least in part, on the at least one monitored variable;
• a first bypass line and a first diverter valve coupled to the coolant loop between the ground-based heat sink and the heat rejection unit, the controller automatically controlling the first diverter valve to control an amount of coolant to pass through the heat rejection unit based, at least in part, on the at least one monitored variable, the controller allowing the coolant to pass through or preventing the coolant from passing through the heat rejection unit by control of the first diverter valve;
• and
• a second bypass line and a second diverter valve coupled to the coolant loop upstream of the ground-based heat sink, the controller automatically controlling the second diverter valve to control an amount of coolant to pass through the ground-based heat sink based, at least in part, on the at least one monitored variable, the controller allowing the coolant to pass through the ground-based heat sink or preventing the coolant from passing through both the ground-based heat sink and the heat rejection unit by control of the second diverter valve.