net result of the depicted embodiment is as follows thus the exemplary embodiment of fig5 b achieves a net reduction in makeup water requirement of 12 3 gpm 48 of wesp makeup water or 9 of total makeup water and a net reduction in water discharge of 13 5 gpm 100 of total discharge water the operating costs for an evaporator using flue gas to evaporate a portion of the bleed water are substantially less than those of a direct fired natural gas evaporator as there is no purchased fuel needed to run it and all energy comes from waste heat in the flue gas operating costs decrease as expected in inverse proportion to the percent of condensate return to the boiler fig6 shows for a given boiler steam rate what size evaporator would be required all references including publications patent applications and patents cited herein are hereby incorporated by reference to the same extent as if each reference were individually and specifically indicated to be incorporated by reference and were set forth in its entirety herein the use of the terms u201c a u201d and u201c an u201d and u201c the u201d and similar referents in the context of describing the invention especially in the context of the following claims are to be construed to cover both the singular and the plural unless otherwise indicated herein or clearly contradicted by context recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range unless otherwise indicated herein and each separate value is incorporated into the specification as if it were individually recited herein all methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context the.