The aim of this work is the experimental analysis of steady-state and transient behavior of a primary surface recuperator installed in a 100 kW commercial microgas Turbine (mGT). The machine is integrated in an innovative test rig for high temperature fuel cell hybrid system emulation. It was designed and installed by the Thermochemical Power Group (TPG), at the University of Genoa, within the frameworkof the Felicitas and LARGE-SOFC European Integrated Projects. The high flexibility of the rig was exploited to perform tests on the recuperator operating in the standard cycle. Attention is mainly focused on its performance in transient conditions (start-up operations and load rejection tests). Start-up tests werecarried out in both electrical grid-connected and stand-alone conditions, operating with different controlstrategies. Attention is focused on system response due to control strategy and on boundary temperaturevariation because of its influence on component life consumption.
