نتایج جستجو برای: Purge time

تعداد نتایج: 1892244  

Journal: :iranian journal of hydrogen and fuel cell 0
ebrahim alizadeh malek ashtar university of technology, fuel cell technology research laboratory majid khorshidian malek ashtar university of technology, fuel cell technology research laboratory seyed hossein masrori saadat malek ashtar university of technology, fuel cell technology research laboratory seyed majid rahgoshay malek ashtar university of technology, fuel cell technology research laboratory mazaher rahimi-esbo malek ashtar university of technology, fuel cell technology research laboratory

proton exchange membrane fuel cells (pemfcs) with a dead-ended anode and cathode can obtain high hydrogen and oxygen utilization by a comparatively simple system. nevertheless, the accumulation of the water in the anode and cathode channels might cause a local fuel starvation degrading the performance and durability of pemfcs. in this study, a brand new design for a polymer electrolyte membrane...

2012
Jixin Chen Jason B. Siegel Anna G. Stefanopoulou

This paper focuses on the optimization of the purge cycle for dead-ended anode (DEA) operation of a proton exchange membrane (PEM) fuel cell. Controling the purge interval at given operating conditions can optimize the fuel cell efficiency and hydrogen loss during the purge. For this optimization, a model capturing the liquid water and nitrogen accumulation in the anode and the purge flow behav...

 Recently, special type of fuel cells has been developed that operates in a Dead End mode. Working in this condition, the Dead-End fuel cell is supplied withhydrogen almost at the same rate of consumption. It is noteworthy to mention thatall of the water transport mechanisms have been considered in this simulation.Water accumulation that is directly proportional to the cell current is of a grea...

Journal: :journal of heat and mass transfer research(jhmtr) 2015
amirmohammad khazaee pool rouzbeh shafaghat qadir esmaili abbas ramiar

recently, special type of fuel cells has been developed that operates in a dead end mode. working in this condition, the dead-end fuel cell is supplied withhydrogen almost at the same rate of consumption. it is noteworthy to mention thatall of the water transport mechanisms have been considered in this simulation.water accumulation that is directly proportional to the cell current is of a great...

2008
Yih-Choung Yu

A simple fault detection algorithm was designed to monitor the purge pump operation of a rotary type ventricular assist device (AB-180 Circulatory Support System [AB-180 CSS], CardiacAssist, Inc., Pittsburgh, PA, USA). This algorithm receives the fluid pressure of the purge system, calculates the pressure derivative, and then compares with the preset thresholds to detect potential abnormal cond...

Journal: :Journal of abnormal psychology 2013
Kelly C Berg Ross D Crosby Li Cao Carol B Peterson Scott G Engel James E Mitchell Stephen A Wonderlich

Ecological momentary assessment (EMA) data suggest that global negative affect (NA) increases prior to and decreases following episodes of binge eating and purging, providing support for the affect regulation model of BN. The current study examined whether facets of NA are differentially related to bulimic behaviors. Women with bulimia nervosa (BN; n = 133) completed a 2-week EMA protocol. Mome...

Journal: :The journal of extra-corporeal technology 1998
K Lee-Sensiba N Azzaretto C Carolina N DiCarmine D Hymowitz S Kay K Kooker M Salogub E Wong Y Tamari

The purge line is a necessary component on arterial filters, although its presence may affect the amount of flow reaching the patient as well as the pump outlet pressure in the extracorporeal circuit. In-vitro and clinical studies conducted to investigate these effects with a commonly used purge line showed that at flows less than 1.5 L/min, rates for pediatric or infant patients, the purge lin...

2013
A. A. Robel E. DeGiuli C. Schoof E. Tziperman

[1] Understanding the mechanisms governing temporal variability of ice stream flow remains one of the major barriers to developing accurate models of ice sheet dynamics and ice-climate interactions. Here we analyze a simple model of ice stream hydrology coupled to ice flow dynamics and including drainage and basal cooling processes. Analytic and numerical results from this model indicate that t...

2002
M. A. Abdou

The breeder thermal performances under a purge line break have been analyzed for two blanket design options: a blanket design using a packed breeder bed and a blanket design using a sintered breeder product. Under a purge line break open to a vacuum environment, the packed bed breeder temperature exceeds its operating temperature limit at a faster rate than that of the sintered breeder blanket ...

Journal: :Bone Marrow Transplantation 1998

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