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Integrated Design, Optimization, and Experimental Realization of a Steam-Driven Micro Recirculation Fan for Solid Oxide Fuel Cell Systems

This thesis presents the results of the design and experimental investigation of a patented 10 kWel solid oxide fuel cell (SOFC) system with a thermally-driven anode off-gas recirculation (AOR) fan, the so-called fan-turbine unit (FTU). The system has the ...

EPFL2019

Identification of optimal operating strategy of direct air-cooling condenser for Rankine cycle based power plants

François Maréchal, Ligang Wang, Xiang Li

Direct air-cooling condenser has attracted significant attention in the last decade due to the employment of Rankine-cycle based power plants from renewable (e.g., concentrated solar) or traditional (e.g., coal) heat sources in water-scarce areas. The opti ...

2018

A data-driven model for the air-cooling condenser of large-scale coal-fired power plants based on data reconciliation and support vector regression

François Maréchal, Ivan Daniel Kantor, Ligang Wang, Jean-Loup Sylvain Robineau, Xiang Li

The performance of a direct air-cooling condenser under operation is rather complicated, as it is interactively affected by the operating conditions (e.g., the mode of air fans) and ambient conditions (e.g., temperature and wind speed). To understand the c ...

2018

Global Fan Speed Control Considering Non-Ideal Temperature Measurements in Enterprise Servers

David Atienza Alonso, Mohamed Mostafa Sabry Aly, Jungsoo Kim

Time lag and quantization in temperature sensors in enterprise servers lead to stability concerns on existing variable fan speed control schemes. Stability challenges become further aggravated when multiple local controllers are running together with the f ...

IEEE/ACM Press2014

A Scalable and Adaptive Technique for Compensating Process Variations and Controlling Leakage and Delay in the FPGA

Yusuf Leblebici, Christian Piguet, Bahman Kheradmand Boroujeni

A new circuit style is proposed to tune the delay, subthreshold leakage (ISUB), and gate leakage (IG) of high fan-in multiplexer circuits, such as the FPGA Look-Up Table (LUT) and Switch-Box (SB), without increasing the Gate Induced Drain Leakage (GIDL) cu ...

American Scientific Publishers2013

Heat Transfer and Performance Characteristics of Axial Cooling Fans with Downstream Guide Vanes

Peter Ott, Alexandros Terzis

This study examines experimentally the effect of stators on the performance and heat transfer characteristics of small axial cooling fans. A single fan impeller, followed by nine stator blades in the case of a complete stage, was used for all the experimen ...

2012

Effects of Swirl Velocities From Fan Assemblies Mounted on Lifting Surfaces

Alexandros Terzis, Charilaos Kazakos, Nikolaos Papadopoulos

The penetration of a jet of fluid into a traversal moving stream is a basic configuration of a wide range of engineering applications, such as film cooling and V/STOL aircrafts. This investigation examines experimentally the effect of blowing ratio of fans ...

2011

Effect of Stators on the Performance and the Thermal Capabilities of Small Axial Cooling Fans

Peter Ott, Alexandros Terzis

This investigation examines experimentally the effect of stators on the performance curves and the heat transfer capabilities of small axial cooling fans. The experimental data indicated that the results are highly affected by the flow conditions at the fa ...

2011

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Integrated Design, Optimization, and Experimental Realization of a Steam-Driven Micro Recirculation Fan for Solid Oxide Fuel Cell Systems

Patrick Hubert Wagner

EPFL2019

Identification of optimal operating strategy of direct air-cooling condenser for Rankine cycle based power plants

François Maréchal, Ligang Wang, Xiang Li

2018

A data-driven model for the air-cooling condenser of large-scale coal-fired power plants based on data reconciliation and support vector regression

François Maréchal, Ivan Daniel Kantor, Ligang Wang, Jean-Loup Sylvain Robineau, Xiang Li

2018