Proceedings of Heat Transfer Conference ASME 2009 Summer July 19-23, 2009, San Francisco, USA HT2009-88222 LUMPED PARAMETERS MODELING OF AN INCINERATOR WITH HEAT RECOVERY FOR ENERGY PRODUCTION Marco Antonelli Faculty of Engineering Dep. of Energetica University of Pisa Pisa, Italy 56100 Email: marco.antonelli@ing.unipi.it Alessio Simi Faculty of Engineering Dep. of Energetica University of Pisa Pisa, Italy 56100 Email: a.simi@ing.unipi.it Luigi Martorano Faculty of Engineering Dep. of Energetica University of Pisa Pisa, Italy 56100 Email: l.martorano@ing.unipi.it Roberto Lensi Faculty of Engineering Dep. of Energetica University of Pisa Pisa, Italy 56100 Email: r.lensi@ing.unipi.it ABSTRACT This work shows the modeling of an incineration plant with en- ergy recovery which operates in the vicinity of Pisa, Italy. The plant analysed was built formerly as an incineration plant and was recently refurbished with a heat recovery steam generator to drive a condensing steam turbine. In the foresight of an enlargement of the plant capacity, the Tech- nical Office of the Company asked the Energetica Department of University of Pisa for an analysis of the recovery capability. The Technical Office and the Energetica Department decided to create a lumped parameter model in order to simulate the tem- perature behavior of the combustion products. This model was created inside Matlab/Simulink environment. The followed pro- cedure led to the reproduction of the system interested by the cycle in steady state conditions in order to obtain a model sim- ple enough but at the same time rigorous of the real behavior of steam cicle. After the description of the plant modeling, model calibration and validation is shown, by means of the comparison between the measured and simulated values of temperatures and mass flows in several load conditions. The model developed is currently used by the Technical Office of the Company for further developments of the plant. NOMENCLATURE A heat exchange surface c p,i is the specific constant pressure heat capacity of the generic fluid i d diameter of a pipe h in the inlet steam enthalpy h out outlet steam enthalpy calculated isentropically H piezometric head L pipe lenght ˙ m mass flow rate ˙ m m mass flow rate of water/steam mixture ˙ m ev mass flow rate across the evaporator ˙ m i mass flow rate of the generic fluid i ˙ m s mass flow rate of saturated steam ˙ m w water mass flow rate 1 Copyright c  2009 by ASME