Simulation Analysis of Environmental Adaptability of High Pressure Fuel Cell Engine Air Supply System

2018 ◽  
Author(s):  
Fengxiang Chen ◽  
Xiaoyu Chen ◽  
Xing Chen
Keyword(s):  
High Pressure ◽  
Fuel Cell ◽  
Simulation Analysis ◽  
Supply System ◽  
Air Supply ◽  
Environmental Adaptability

An Unknown Input Nonlinear Observer Based Fractional Order PID Control of Fuel Cell Air Supply System

2020 ◽  
Vol 56 (5) ◽  
pp. 5523-5532 ◽  
Author(s):  
Dongdong Zhao ◽  
Fei Li ◽  
Rui Ma ◽  
Guosheng Zhao ◽  
Yigeng Huangfu
Keyword(s):  
Fuel Cell ◽  
Fractional Order ◽  
Pid Control ◽  
Supply System ◽  
Nonlinear Observer ◽  
Unknown Input ◽  
Air Supply ◽  
Fractional Order Pid

Research on Control Algorithm of Air Supply System for High-Pressure PEMFC Engine

2019 ◽  
Author(s):  
Fengxiang Chen ◽  
Zhicheng Lin ◽  
Jieran Jiao ◽  
Jilong He
Keyword(s):  
High Pressure ◽  
Control Algorithm ◽  
Supply System ◽  
Air Supply

scholarly journals CFD simulation analysis on integrated operation of range-hood and make-up air supply for cooking-generated particulate matter

2019 ◽  
Vol 111 ◽  
pp. 04048
Author(s):  
Hyungkeun Kim ◽  
Kyungmo Kang ◽  
Yun-Gyu Lee ◽  
Taeyeon Kim
Keyword(s):  
Particulate Matter ◽  
Case Studies ◽  
Cfd Simulation ◽  
Simulation Analysis ◽  
Supply System ◽  
Airflow Rate ◽  
Cfd Simulations ◽  
Flow Angle ◽  
Air Supply ◽  
Integrated Operation

One of the most important problems of cooking-generated particulate matter (PM) is that it rapidly disperses when the range hood is in operation during cooking. To improve the performance of the range hood and prevent the dispersion of PM, a supply of make-up air equivalent to the airflow rate of the range hood should be provided. In this regard, we place an auxiliary supply system as a make-up supply to solve such problems. The objective of this study is to evaluate the performance of the make-up air supply system and the range hood. To evaluate this system, several case studies were performed involving CFD simulations. The auxiliary supply system is optimized through three types of variables (size of diffuser, distance from the source, and flow angle). An increase in the length of the diffuser causes PM dispersion to decrease. The installation of the diffuser at a certain distance from the emission source is effective in preventing dispersion of cooking-generated PM. In the building analyzed in this study, supplying the make-up air at an angle of 10° was observed to be most effective.

Dynamic Modelling and Controls of an Air Supply System for In-Flight Proton Exchange Membrane Fuel Cells (PEM-FC)

2007 ◽  
Author(s):  
Lukas P. Barchewitz ◽  
Joerg R. Seume
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Power Density ◽  
Supply System ◽  
Operating Conditions ◽  
Design Parameters ◽  
Radial Turbine ◽  
Air Supply ◽  
Exchange Membrane ◽  
Turbomachinery Design

To cover the increasing demand of on-board electrical power and for further reduction of emissions, the conventional auxiliary power unit (APU) may be replaced by a fuel cell system with an expected efficiency increase of 25% to 50% when compared to start-of-the-art GT-APU. The main components of an in-flight FC system are a compressor-turbine unit, a kerosene reformer, and the fuel cell. Polymer exchange membrane fuel cells (PEM-FC) may be favored because of their currently advanced level of development, their high power density and the available liquid water in the cathode-off gases which can be used as service water on-board. Transient requirements may have significant impact on system design and operating range and will therefore be addressed in this paper. During in-flight operation, air has to be compressed from the ambient to a pressure near standard conditions, which allows the application of state-of-the-art PEM-FC and ensures a constant power density independent from the operating altitude. A centrifugal compressor is chosen for pressurization of the system and is powered by a radial turbine, which allows autonomous operation at cruising altitude without external power. For off-design operation and transients, electric support from the PEM-FC is necessary, see [1]. The radial turbine itself is run by the hot exhaust gases from a post-combustor using the remaining energy in the cathode off-gases. A thorough trade-off between suitable compressor techniques for the air supply system was carried out in [1]. Turbomachinery revealed to be favourable for the PEM air supply system due to their low specific weight and high efficiency. The air supply system resembles the turbocharger for a combustion engine (Fig. 1), which represents a good starting point for a successful integration into the flight environment and further development due to known technology. Based on a turbomachinery design which satisfies the system requirements, the dynamic behavior of the air supply system is analyzed when coupled to the PEM fuel cell. The main focus is on the detection of sensitive system parameters causing system response delay or critical operating conditions. The present paper suggests system features, turbomachinery design parameters and controller types which achieve inherent stability and fast response of the air supply system throughout the entire flight envelope.

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