“…Regeneration has a positive effect when heat is transferred to a second fluid, which is introduced before the expansion and mixed in the hot section of the turbine. This is the case of steam injected gas turbines which are used in peak power production or in combined heat and power generation (Brown and Cohn, 1981;Tuzson, 1992;Rice, 1993a-b, Saad andCheng, 1992). The steam injected cycles have then evolved into the humid air turbine (HAT) configuration, which was shown to achieve the highest increase in gas turbine power output and efficiency Joiner, 1990, Stecco, et al 1993a-b Chiesa, et al, 1994, Lindgren, et al, 1992, Rosen, et al, 1994.…”