Economic Feasibility of Variable Frequency Driving Pump by Fuzzy Financial Model

A fuzzy economic decision model is derived to evaluate the feasibility of a variable frequency drive (VFD) pump. Fan or pump using VFD speed control has been shown the best control method on energy saving point of view. The performance of the proposed fuzzy economic model is verified by considering their application to a VFD driving pump. These investigations not only confirm that the results of the fuzzy economic model is consistent with the conventional crisp model, but also demonstrate that the proposed model is more flexible, intelligent and computationally efficient compared to the extension principle fuzzy mathematics approach. The developed model represent readily implemented feasibility analysis tool for use in the arena of uncertain economic decision-making.