passing through the coil 56 has its cooling enhanced by a second circuit of falling evaporative heat exchange water which is being pumped from the lower water collection basin up into a top water distribution system 24 thus this system provides heat exchange to a primary fluid by virtue of the circulation of a secondary fluid through the tower the secondary fluid flow is similar to that described for fig1 4 thus fig5 and 6 illustrate an embodiment schematically as in fig4 but with the addition of the lower coil circuit 56 of course an embodiment according to fig1 can also be implemented with a lower coil similar to that illustrated in fig5 and 6 disposed with the lower fill media 30 of the embodiment of fig1 in this way the above description for fig1 6 includes four sub groups of embodiments the embodiment of fig1 3 without the additional lower coil the embodiment of fig4 without the additional lower coil the embodiment of fig1 but also having an additional lower coil not shown and the embodiment of fig5 6 having an additional lower coil fig5 shows the top section in evaporative mode and fig6 shows closed circuit mode for the top section in both fig5 and 6 the lower section is active to pass water over the coils.