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Experimental thermodynamic performance analysis of a micro humid air turbine

par De Paepe, Ward ;Montero Carrero, Marina ;Bram, Svend;Contino, Francesco
Référence International conference on Efficiency, Cost, Optimization, Simulation and Environmental impact of energy systems(ECOS 2016: Pau, France), Proceedings of the 28th international conference on Efficiency, Cost, Optimization, Simulation and Environmental impact of energy systems (ECOS 2015)
Publication Publié, 2015

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• Accès en ligne
• Détails
• Contenu
• Statistiques

Résumé :

Waste heat recovery has become more and more important for the profitability of small-scale Combined Heat and Power (CHP) plants like micro Gas Turbines (mGTs). Adding a saturation tower to the mGT unit is such a waste heat recovery route. The cycle includes the saturation tower after the compressor to humidify the compressed air. Simulations show that this cycle, known as the micro Humid Air Turbine (mHAT), increases mGT electric efficiency by 7%, improving the general economic performance. However the mHAT concept with saturation tower was never tested experimentally. To show the potential of the cycle, the Turbec T100 mGT of the University of Brussels was converted into a mHAT cycle by adding a spray saturation tower to the system. In this paper, we present the results of several water injection tests in the T100 mGT at part and nearly nominal load. The water injection experiments resulted in stable mGT operation at reduced rotational speed, reduced pressure ratio and increased electric efficiency. Experimental results showed a reduced fuel mass flow rate by 4.3% and a relative electric efficiency increase of 4.8% for the different experiments. In addition, the impact of the water on the other turbine parameters has been studied.