Application of Water-Lubricated Bearings in Motorized Centrifugal Air Compressor for Fuel Cell Automotives

2014 ◽  
Vol 670-671 ◽  
pp. 920-923 ◽  
Author(s):  
Ming Feng ◽  
Tian Ming Ren
Keyword(s):  
High Speed ◽  
Proton Exchange Membrane ◽  
High Efficiency ◽  
Load Capacity ◽  
Pressure Ratio ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Air Compressor ◽  
Rotating Speed ◽  
New Energy

Proton exchange membrane (PEM) fuel cells intended for new energy automotives require a high efficiency and reliability motorized compressor to supply pressurized air. This paper presents a study and development of a motorized centrifugal air compressor using water-lubricated bearings. Comparing the performance of water-lubricated bearing with gas-lubricated bearing, we found that under the same power consumption the load capacity of water-lubricated bearings are more suitable for high speed motorized compressor system. A prototype was built and tested to verify the possibility of the developed motorized centrifugal air compressor. The results show that the system can operate at a stable rotating speed up to 80,000 rpm. The flow rate of the pressurized air is 350Kg/h and pressure ratio is 1.52 at 60,000 rpm, with a global efficiency of approximately 80%.

scholarly journals Fuel Cell designing with optimal high speed air compressor

2021 ◽  
pp. 29-38
Author(s):  
Nabeel Ahsan ◽  
Mahrukh Mehmood ◽  
Asad A. Zaidi
Keyword(s):  
Fuel Cell ◽  
High Speed ◽  
Proton Exchange Membrane ◽  
Cell System ◽  
Proton Exchange ◽  
Operating Conditions ◽  
Air Compressor ◽  
Different Types ◽  
Input Parameters ◽  
Turbo Compressor

This paper discusses different air management technologies for fuel cell systems. Two different types of compressors are analyzed for Proton-exchange membrane fuel cells (PEMFC). Some important criteria are analyzed thoroughly for the selection of turbo compressor among different types of compressors illustrated with the help of matrix representations. The impacts of various input parameters for Fuel Cell (FC) are also explained thoroughly. Later the numerical modeling of an automobile fuel cell system using a high speed turbo-compressor for air supply is explained. The numerical model incorporates the important input parameters related with air and hydrogen. It also performed energy and mass balances across different components such as pump, fan, heat-exchanger, air compressor and also keeps in consideration the pressure drop across the flow pipes and various mechanical parts. The model is solved to obtain the characteristics of the FC system at different operating conditions. Therefore, it can be concluded that the high speed turbo compressor with a turbo-expander can have significant effects on the overall system power and efficiency.

Effects of CO on Performance of HT-PEM Fuel Cells

2013 ◽  
Vol 724-725 ◽  
pp. 723-728
Author(s):  
Xue Nan Zhao ◽  
Hong Sun ◽  
Zhi Jie Li
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Large Scale ◽  
Proton Exchange Membrane ◽  
High Efficiency ◽  
Electrochemical Reaction ◽  
Pem Fuel Cell ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Fuel Cell Performance

High temperature proton exchange membrane (HT-PEM) fuel cell is considered as one of the most probable fuel cells to be large-scale applied due to characteristics of high efficiency, friendly to environment, low fuel requirement, ease water and heat management, and so on. However, carbon monoxide (CO) content in fuel plays an important role in the performance of HT-PEM fuel cells. Volt-ampere characteristics and AC impedance of HT-PEM fuel cell are tested experimentally in this paper, and effects of CO in fuel on its performance are analyzed. The experimental results show that CO in fuel increases remarkably the Faraday resistance of HT-PEM fuel cell and decreases the electrochemical reaction at anode; the more CO content in fuel is, the less HT-PEM fuel cell performance is; with the increasing cell temperature, the electrochemical reaction on the surface of catalyst at anode is improved and the poisonous effects on the HT-PEM fuel cell are alleviated.

Study on Thin Wall Injection Molding Formability and Property of Graphite-Polymer Composite Bipolar Plate for Proton Exchange Membrane Fuel Cell

2006 ◽  
Vol 505-507 ◽  
pp. 673-678
Author(s):  
Chaug Liang Hsu ◽  
Ke Ming Chang
Keyword(s):  
Proton Exchange Membrane ◽  
High Efficiency ◽  
Bipolar Plate ◽  
Proton Exchange ◽  
Thin Wall ◽  
Environment Pollution ◽  
Gas Oil ◽  
New Energy ◽  
Wall Injection ◽  
Exchange Membrane

The electricity is the most important motive power in the world for the economy and the industry. But today the electricity is always generating by natural gas, oil, and coal, hence environment pollution caused by fossil fuel will be more serious, and crude oil will be used up in 40-50 years (according to the report of Statistical Review of World’s Energy’s Research), it is need to develop a high efficiency and zero-emission in new energy.

scholarly journals Hydrogen Horizon

2009 ◽  
Vol 131 (05) ◽  
pp. 32-35 ◽  
Author(s):  
Satish G. Kandlikar ◽  
Jacqueline Sergi ◽  
Jacob LaManna ◽  
Michael Daino
Keyword(s):  
Fuel Cells ◽  
Internal Combustion Engines ◽  
Proton Exchange Membrane ◽  
Energy System ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Petroleum Production ◽  
Transportation Sector ◽  
New Energy ◽  
Exchange Membrane

This review focuses on the role of hydrogen technologies in transition from petroleum production to new fuel to power transportation system. At present, the looming crisis caused by the decline in petroleum production and the need to control greenhouse gas emissions exemplifies the need for new energy solutions. The key component of a hydrogen-powered transportation sector will be the proton exchange membrane (PEM) fuel cell. PEM fuel cells use hydrogen and oxygen to generate electricity, with water and heat as by-products of the electro-chemical reaction. The review also discusses that to compete favorably with internal combustion engines and hybrid cars, PEM fuel cells need to address several issues, including performance, durability, and cost. Hydrogen from natural gas could provide a firm stepping stone as the energy system evolves away from petroleum.

Design and Investigation on a Centrifugal Compressor for PEM Fuel Cell System

2021 ◽  
Author(s):  
Bihuan Zong ◽  
Weilin Zhuge ◽  
Qiyu Ying ◽  
Haoxiang Chen ◽  
Yangjun Zhang
Keyword(s):  
Fuel Cell ◽  
Centrifugal Compressor ◽  
Rotational Speed ◽  
Optimization Design ◽  
High Efficiency ◽  
Pressure Ratio ◽  
Proton Exchange ◽  
Motor Speed ◽  
Loss Mechanism ◽  
Air Compressor

Abstract Proton Exchange Membrane Fuel Cell (PEMFC) is a very attractive power source to meet high efficiency and low emission. For mobility applications, PEMFC needs to have a larger power density and it can be achieved with an air compressor to intake more air for chemical reaction. Different from a turbocharger, the compressor for PEMFC is not driven by a turbine, but by an electric motor as well. Due the limitation of motor speed and compact system size, the air compressor must be in small size and operate with low rotational speed. In compressor aerodynamic study, low specific speed and small size is believed to have large loss and it needs to be further investigated and improved. In this paper, a centrifugal compressor combined with an air bearing is specially developed, with rotational speed as 120k RPM and pressure ratio as 3.5. The compressor impeller, diffuser and volute are designed by mean-line method followed by 3D detailed design. Computational fluid dynamics method is employed to predict compressor performance as well as analyze compressor internal flow field and loss mechanism. Simulation results indicate that major losses including leakage flow loss in impeller and loss in diffuser. As a result, corresponding optimization design method is proposed, the total-to-total aerodynamic efficiency of the redesigned compressor has increased 5% at design point.

scholarly journals Technical and Commercial Challenges of Proton-Exchange Membrane (PEM) Fuel Cells

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 144
Author(s):  
Abed Alaswad ◽  
Abdelnasir Omran ◽  
Jose Ricardo Sodre ◽  
Tabbi Wilberforce ◽  
Gianmichelle Pignatelli ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
High Efficiency ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Operating Conditions ◽  
Future Research ◽  
Fuel Cell Performance ◽  
Research Activities

This review critically evaluates the latest trends in fuel cell development for portable and stationary fuel cell applications and their integration into the automotive industry. Fast start-up, high efficiency, no toxic emissions into the atmosphere and good modularity are the key advantages of fuel cell applications. Despite the merits associated with fuel cells, the high cost of the technology remains a key factor impeding its widespread commercialization. Therefore, this review presents detailed information into the best operating conditions that yield maximum fuel cell performance. The paper recommends future research geared towards robust fuel cell geometry designs, as this determines the cell losses, and material characterization of the various cell components. When this is done properly, it will support a total reduction in the cost of the cell which in effect will reduce the total cost of the system. Despite the strides made by the fuel cell research community, there is a need for public sensitization as some people have reservations regarding the safety of the technology. This hurdle can be overcome if there is a well-documented risk assessment, which also needs to be considered in future research activities.

Experimental Test Results for Four High-Speed, High-Pressure, Orifice-Compensated Hybrid Bearings

1994 ◽  
Vol 116 (1) ◽  
pp. 147-153 ◽  
Author(s):  
N. M. Franchek ◽  
D. W. Childs
Keyword(s):  
High Speed ◽  
Load Capacity ◽  
Pressure Ratio ◽  
Reynolds Numbers ◽  
Orifice Diameter ◽  
Test Results ◽  
Rotordynamic Coefficients ◽  
Geometric Configurations ◽  
Overall Performance ◽  
Mass Terms

In this study, four hybrid bearings having different geometric configurations were experimentally tested for their static and dynamic characteristics, including flowrate, load capacity, rotordynamic coefficients, and whirl frequency ratio. The four bearings included a square-recess, smooth-land, radial-orifice bearing (baseline), a circular-recess bearing, a triangular-recess bearing, and an angled-orifice bearing. Each bearing had the same orifice diameter rather than the same pressure ratio. Unique to these test results is the measurement of the added mass terms, which became significant in the present tests because of high operating Reynolds numbers. Comparisons of the results were made between bearings to determine which bearing had the best performance. Based on the parameters of interest, the angled-orifice bearing has the most favorable overall performance.

A Promising Proton-Exchange Membrane: High Efficiency in Low Humidity

2018 ◽  
Vol 1 (6) ◽  
pp. 2464-2473 ◽  
Author(s):  
Koorosh Firouz Tadavani ◽  
Amir Abdolmaleki ◽  
Mohammad Reza Molavian ◽  
Mohammad Zhiani
Keyword(s):  
Proton Exchange Membrane ◽  
High Efficiency ◽  
Proton Exchange ◽  
Low Humidity ◽  
Exchange Membrane
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