An exemplary cooling method may comprise thermally coupling a network of cooling lines to each of a plurality of heat exchangers in a cooling system. The method may also comprise providing a first connection from a network of cooling lines to a first fluid source and a second connection from the network of cooling lines to an optional second fluid source. The method may also comprise delivering cooling fluid through the network of cooling lines to each of the plurality of heat exchangers whether the network of cooling lines is connected only to the first fluid source or to both the first and second fluid sources.