Water Extraction from Air: A Proposal for a New Indicator to Compare Air Water Generators Efficiency

Water extraction from air, based on reverse cycle systems, is becoming a technology more and diffused various models of air to water generators (AWG) are now available, all claiming the best efficiency. To date, there not standard indicator stating energy efficiency for AWGs, neither in literature nor technical practice. The only evaluation parameter, that can be found sort specific consumption (SEC) without any clear indications about involved calculation terms, definition hypotheses, or environmental conditions. current work first proposal an standardise AWG evaluation. called WET (Water Energy Transformation); it states production as useful effect machine calculates its performance with approach similar COP (Coefficient Performance) EER (Energy Efficiency Ratio) meant normalised tool permits comparing different machines, but also part wider study, currently under development oriented obtain global index formulation combines itself, COP, intended comprehensive effects integrated compliance approach. paper presents equation, discussion set conditions some application examples, including comparison SEC.