Prof. Fei DUAN

School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798.

E-mail: feiduan@ntu.edu.sg

Bio

Dr. Fei DUAN is a tenured faculty in School of Mechanical and Aerospace Engineering at Nanyang Technological University (NTU), Singapore. Dr. Duan obtained his Ph.D. degree in University of Toronto, Canada in 2005. Dr. Duan also worked as a visiting scientist in Institute of Fluid Mechanics at Friedrich-Alexander-University, Erlangen-Nuremberg, Germany. The topics of his research cover droplet wetting and evaporation dynamics, enhanced thermal management, efficient cogeneration system, etc. In NTU, Dr. Duan has secured over 16 million Singapore dollars on research funding from the governmental agencies and industries as a principal investigator. He has advised over 28 postdoctoral fellows or research associates, 20 Ph.D. students, and 14 Master’s students. Dr. Duan has published over 190 peer-reviewed journal papers, 4 patents, 5 book chapters, and 130 conference presentations including 20 plenary lectures and keynotes. He serves as Subject Editor for Applied Thermal Engineering (Elsevier, Impact Factor: 6.1), at Editorial Board for Scientific Reports (Nature Portfolio, Impact Factor: 3.8) and Frontiers in Heat and Mass Transfer (Tech Science Press); and Editor at Large in Droplet (Willy).

Title

Gas Turbine Power Generation System Fueled with Partially Cracked Ammonia

Abstract

Decarbonization requires applying zero-carbon fuels transferred from hydrocarbon fuels as one potential solution in power generation. Partial ammonia cracking has become an effective solution to address the low reactivity and high ignition energy from the combustion of pure ammonia. The talk covers the application of ammonia utilization in power generation, the principles of partial ammonia cracking, and the design of single-cycle and cogeneration gas turbine systems. The parameter studies on thermodynamics are performed to assess the off-design gas turbine performance under various fuel types and injections. Under the same turbine inlet temperature and compression ratio, the ammonia-fueled gas turbine has a relatively narrow load operating range that can be expanded by increasing compression ratio, enhancing combustion stability and decomposing ammonia fuel. Incorporating considerations of fuel interchangeability, components of cracker and turbine, and system safety, the feasible operating envelopes of 30 MW partially cracking ammonia-fueled gas turbine are evaluated, the thermal efficiency of single-cycle system can vary between 43.1% and 46.0% and the cogeneration efficiency ranges from 81.7% to 82.5%. Additionally, the kinetic modelling and emission characteristics of multi-staged partially cracked ammonia/ammonia-fueled gas turbine combustors are also discussed. The multistage combustion configurations are discussed on  both combustion stability and emission control on the parameters of ammonia substitution rate, local equivalence ratio, and ammonia cracking ratio. Further economic assessment of the proposed systems is conducted.