Session: 04-20 Combustor Design II

Paper Number: 129069

129069 - Combustor Operational Flexibility in the Ansaldo Energia GT36 Fleet 

Ansaldo Energia has successfully introduced the GT36 H-class gas turbine to the market. The GT36 is equipped with a two stage Constant Pressure Sequential Combustion (CPSC) system, which consists of a premix burner system (Multi-burner first stage, MBFS) and a sequential burner (SB) in series within a can combustor architecture. The development and validation of the combustor system was accompanied by publications at recent ASME conferences, with a focus on fuel flexibility, turndown and applicability for future hydrogen applications.

In this paper, the optimized version of the CPSC system that is running commercially on various GT36 units will be described. Supported by field data, the paper will elaborate on important aspects of combustor operation, such as: Ignition and startup reliability, stable operation during engine load transients (including fast loading/de-loading, load rejection, and ancillary services such as primary frequency response), robustness against variable fuel properties, and operability under changing ambient conditions. Additionally, dedicated data is shown to demonstrate the extended turndown capability to below 20% relative load and the low emission levels from ignition to full load. The emission data covers fuel composition variation from virtually pure methane (<0.5% C2+) to higher order hydrocarbon compound concentrations of up to 14% C2+.

Presenting Author: Patricia Sierra Sanchez Ansaldo Energia Switzerland Ltd

Presenting Author Biography: Combustor Operations Group leader at Ansaldo Energia

Authors:

Patricia Sierra Sanchez Ansaldo Energia Switzerland Ltd
Douglas Pennell Ansaldo Energia Switzerland Ltd
Richard L. R. Smith Ansaldo Energia Switzerland Ltd
Anders Wickström Ansaldo Energia Switzerland Ltd
Francesco Gant Ansaldo Energia Switzerland Ltd
Frédéric Boudy Ansaldo Energia Switzerland Ltd