Reconditioning & Service
How much evaporation can be realized from each BTU of heating medium? There is, of course, no single answer to this question. Each evaporation assignment requires its own answer. Relative fouling characteristics and boiling point rise are two of the many basic physical considerations that relate to potential energy economy. The ultimate practicality of any energy conservation approach can only be determined after all economic factors are considered.
Multiple effect, thermal vapor recompression and mechanical vapor recompression are the three basic methods for realizing more from each BTU of heating medium. As the following discussion indicates, in each case, the heat contained in the exhaust vapor is saved to be utilized again.