Search Results - subject:"Transient response"

The effects of air stoichiometry and air excess ratio on the transient response of a PEMFC under load change conditions

Kim, Bosung; Cha, Dowon; Kim, Yongchan - In: Applied Energy 138 (2015) C, pp. 143-149

The transient response of a proton exchange membrane fuel cell (PEMFC) is an important issue for transportation … response of a PEMFC for achieving more stable cell performance under load change conditions. The transient response of a PEMFC … applications. The objective of this study is to investigate the effects of operating and controlling parameters on the transient …

Persistent link: https://www.econbiz.de/10011116030

Comparison of fault-ride-through capability of dual and single-rotor wind turbines

Farahani, E.M.; Hosseinzadeh, N.; Ektesabi, M. - In: Renewable Energy 48 (2012) C, pp. 473-481

The majority of wind turbines currently in operation have the conventional concept design. That is a single-rotor wind turbine (SRWT) which is connected through spur gearbox to a generator. Recently, dual-rotor wind turbine (DRWT) has been introduced to the market. It has been proven that the...

Persistent link: https://www.econbiz.de/10010805889

Transient response of a 50 kW organic Rankine cycle system

Lee, Yuh-Ren; Kuo, Chi-Ron; Wang, Chi-Chuan - In: Energy 48 (2012) 1, pp. 532-538

This study examines the transient responses of a 50 kW ORC (Organic Rankine Cycle) system subject to change of the water coolant in the condenser with R-245fa as the working fluid. With a moderate increase or decrease of water coolant flow rate, all the major quantities such as the output...

Persistent link: https://www.econbiz.de/10011055143

Periodic characteristic ratio (PCR) method: An alternative method to determine the characteristic polynomial

Tavazoei, Mohammad Saleh; Haeri, Mohammad - In: Mathematics and Computers in Simulation (MATCOM) 80 (2010) 9, pp. 1841-1853

transient response. To develop the method, we have found optimal characteristic rations in simple arrangement of these … parameters via performance map method. Despite its simplicity, the resulted system exhibits better transient response in …

Persistent link: https://www.econbiz.de/10010869926

Static and dynamic modeling of solid oxide fuel cell using genetic programming

Chakraborty, Uday Kumar - In: Energy 34 (2009) 6, pp. 740-751

Modeling of solid oxide fuel cell (SOFC) systems is a powerful approach that can provide useful insights into the nonlinear dynamics of the system without the need for formulating complicated systems of equations describing the electrochemical and thermal properties. Several algorithmic...

Persistent link: https://www.econbiz.de/10010809669

Dependability modeling and analysis of hybrid redundancy systems

Chellappan, C.; Vijayalakshmi, G. - In: International Journal of Quality & Reliability Management 26 (2009) 1, pp. 76-96

Purpose – The aim of this study is to demonstrate that hybrid redundancy systems are superior to the conventional N ‐modular redundancy (NMR) systems. Design/methodology/approach – The hybrid redundancy system is a synthesis of the NMR system and the standby redundancy. Each module of the...

Persistent link: https://www.econbiz.de/10014800513