Repowering Existing Under-utilized WTE Power Plant with Gas Turbine

This paper focuses on repowering options to improve waste conversion efficiency of an existing under-utilized Waste-To-Energy (WTE) power plant with a Gas Turbine (GT). In particular, this study investigates the feasibility of middle pressure repowering strategies utilizing the hot gases leaving the GT. For each investigated repowering option, minimum GT size is identified along with optimum plant match condition in terms of plants capacity. Detailed modifications to the WTE cycle and the resulting enhancement of its performance are presented for both analyzed middle pressure repowering options. Numerical results of a representative mid-size WTE power plant repowered with different GT commercial units are shown and discussed.