fundamentals of vehicle propulsion and brake
modern electric hybrid electric and fuel cell vehicles
... Fundamentals of Vehicle Propulsion and Brake Vehicle operation fundamentals mathematically describe vehicle behavior, based on the general principles of mechanics A vehicle, consisting of thousands of ... M , L L hg dt (2.17) and 27 Fundamentals of Vehicle Propulsion and Brake where rd is the effective radius of the wheel Referring to Equations 2.5 and 2.13, Equations 2.16 and 2.17 can be rewritten ... 25 Fundamentals of Vehicle Propulsion and Brake Coefficient of aerodynamic resistance Vehicle type Open convertible 0.5º0.7 Van body 0.5º0.7 Ponton body 0.4º0.55 Wedged-shaped body; headlamps and...
Ngày tải lên: 06/05/2014, 11:35
Novel design of a compacted micro-structured air-breathing PEM fuel cell as a power source for mobile phones
... is essential to the development and optimization of fuel cells, the introduction of cheaper materials and fabrication techniques, and the design and development of novel architectures which enhance ... design and optimization of future fuel cells to improve their lifetime with a much higher power density and lower cost The analysis offers valuable physical insight towards design of a cell and ... performance and design of air-breathing PEM fuel cells Litster and Djilali [1] developed a single-phase one-dimensional semi-analytical model of the membrane electrode assembly (MEA) of planar...
Ngày tải lên: 05/09/2013, 14:58
Novel design of a disk-shaped compacted micro-structured air-breathing PEM fuel cell
... is essential to the development and optimization of fuel cells, the introduction of cheaper materials and fabrication techniques, and the design and development of novel architectures which enhance ... micro-fuel cells in terms of design, materials, effective transport of reactants, and heat management The development of physically representative models that allow reliable simulation of the processes ... performance and design of air-breathing PEM fuel cells Litster and Djilali [1] developed a single-phase one-dimensional semi-analytical model of the membrane electrode assembly (MEA) of planar...
Ngày tải lên: 05/09/2013, 14:58
Design and development of major balance of plant components in solid oxide fuel cell system
... any SOFC system, the performance of the INER SOFC system is dependent not only on the design and operating conditions of the fuel cell stack, but also on the design and operating conditions of ... provided by the anode off-gas given an anode off-gas temperature of less than 650 oC, a cathode off-gas temperature of less than 390 oC, and a flame barrier temperature of less than 700 oC However, ... SOFC BOP system (S/C=1.7, O/C=0.3, fuel utilization = 64.2%, electrical conversion efficiency = 44%) Design of SOFC BOP components The BOP components of a SOFC system account for between 50% and...
Ngày tải lên: 05/09/2013, 16:10
Optimal Design of a Hybrid Electric Car with Solar Cells pptx
... on the sizing of the propulsion system components and on vehicle dimensions, related to solar panel area, as shown in the next paragraph The contribution of solar energy to the propulsion can ... III – POWER, MASS AND DIMENSIONS OF COMMERCIAL CARS In case of HSV, fuel consumption is reduced thanks both to solar energy contribution and to higher efficiency of the hybrid propulsion system: ... evaluation of the efficiency of both conventional and hybrid vehicle depends on several variables [13][19], including control system, not yet considered in this model Average values of 30% and 40%...
Ngày tải lên: 30/03/2014, 10:20
Modern electric, Hybird Electric and Fuel cell Vehicles pot
... Fundamentals of Vehicle Propulsion and Brake Vehicle operation fundamentals mathematically describe vehicle behavior, based on the general principles of mechanics A vehicle, consisting of thousands of ... M , L L hg dt (2.17) and 27 Fundamentals of Vehicle Propulsion and Brake where rd is the effective radius of the wheel Referring to Equations 2.5 and 2.13, Equations 2.16 and 2.17 can be rewritten ... 25 Fundamentals of Vehicle Propulsion and Brake Coefficient of aerodynamic resistance Vehicle type Open convertible 0.5º0.7 Van body 0.5º0.7 Ponton body 0.4º0.55 Wedged-shaped body; headlamps and...
Ngày tải lên: 27/06/2014, 01:21
The optimisation of grid designs for valve-regulated lead/acid batteries for hybrid electric vehicle applications pdf
... and measurement was made at kHz so that calculated and actual values could be compared The measured values differed from the calculated values by ∼5% and the sum of the deviations (positive and ... the same and opposite sides and also double tabs The thickness of the side current collector was also varied Sorting the results by jmean provides a measure of total cell efficiency and the double ... radial designs with dual and single side tabs and (vii) using hexagonal pellets across the whole grid with a 1.0 mm wire and an area of 72 mm2 These were analysed as before and the selected design...
Ngày tải lên: 05/07/2014, 20:21
Fuel Cell/Gas Turbine Hybrid potx
... under 10 MW, and efficiencies greater than 75% with larger systems As fuel cells advance and scale-up, and as higher pressurization of MCFC and/ or SOFC technology becomes viable, larger and more sophisticated ... manufacturing large SOFC and MCFC stacks, that detailed analyses and experimental investigations of hybrid systems were initiated In 1998, the US Department of Energy Of ce of Fossil Energy initiated ... ideninverter and • tifying cost, power complexity, and trade-offs of various • • • • • inverter architectures; inverter and power electronics systems analysis identifying cost, complexity, and trade-offs...
Ngày tải lên: 06/07/2014, 02:20
Modern Electric , Hybrid Electric and rule cell vehicles P1 pps
... Principles of Plug-In Hybrid Electric Vehicles; Chapter 16: Design of Series Hybrid Drive Train for Off-Road Vehicles, and Appendix: Technical Overview of Toyota Prius Chapter 13: Fundamentals of Regenerative ... the fundamentals, theoretical bases, and design methodologies of conventional internal combustion engine (ICE) vehicles, electric vehicles (EVs), hybrid electric vehicles (HEVs), and fuel cell vehicles ... History of Fuel Cell Vehicles References 1 2 3 12 14 17 18 Fundamentals of Vehicle Propulsion and Brake...
Ngày tải lên: 06/07/2014, 07:20
Modern Electric , Hybrid Electric and rule cell vehicles P2 doc
... Fundamentals of Vehicle Propulsion and Brake Vehicle operation fundamentals mathematically describe vehicle behavior, based on the general principles of mechanics A vehicle, consisting of thousands of ... M , L L hg dt (2.17) and 27 Fundamentals of Vehicle Propulsion and Brake where rd is the effective radius of the wheel Referring to Equations 2.5 and 2.13, Equations 2.16 and 2.17 can be rewritten ... 25 Fundamentals of Vehicle Propulsion and Brake Coefficient of aerodynamic resistance Vehicle type Open convertible 0.5º0.7 Van body 0.5º0.7 Ponton body 0.4º0.55 Wedged-shaped body; headlamps and...
Ngày tải lên: 06/07/2014, 07:20
Analysis of transport phenomena and electrochemical reactions in a micro PEM fuel cell with nature inspired flow field design
... development and optimization of micro fuel cells, improve long-term performance and lifetime, the introduction of cheaper materials and fabrication techniques, and the design and development of novel ... is essential to the development and optimization of fuel cells, the introduction of cheaper materials and fabrication techniques, and the design and development of novel architectures The difficult ... and components; and provide a computer-aided tool for the design and optimization of future fuel cells to improve their lifetime with a much higher power density and lower cost The analysis offers...
Ngày tải lên: 09/09/2015, 10:17
Pem fuel cell stack modeling and design of DC DC converter for fuel cell energy system
... portrait of state variable ig for feed-forward and feedback structures at different power and V o is maintained at 400V Phase portrait of state variable ig and Vo for feed-forward and feedback ... voltage-fed and current-fed converters Although many voltage-fed topologies have been implemented in some of the publications, the lack of direct control of input current and the need of a high ... predict both the steady state and dynamic behavior of the stack Description of model development and parameter identification are explained Steady state and dynamic behavior of the hybrid model are...
Ngày tải lên: 14/09/2015, 14:09
A CFD study of hygro-thermal stresses distribution in tubular-shaped ambient air-breathing PEM micro fuel cell during regular cell operation
... conditions of temperature, humidity As a result of in the changes in temperature and moisture, the membrane, GDL and bipolar plates will all experience expansion and contraction Because of the different ... relate the level of over- and undersaturation as well as the amount of liquid water present to the amount of water undergoing phase change In the present work, the procedure of Berning and Djilali ... the cell and the deformation shape of the cell are also shown in figure and respectively Because of the different thermal expansion and swelling coefficients between gas diffusion layers and membrane...
Ngày tải lên: 05/09/2013, 14:58
Modeling optimizes PEM fuel cell durability using threedimensional multi-phase computational fluid dynamics model
... Journal of Energy and Environment (IJEE), Volume 1, Issue 3, 2010, pp.375-398 377 temperature requires studying and modelling of the stress-strain behaviour of membranes and MEAs Weber and Newman ... fuel cells, improve long-term performance and lifetime, the introduction of cheaper materials and fabrication techniques, and the design and development of novel architectures References [1] Zhang, ... cells Spatially varying concentrations of water in both vapour and liquid form are expected throughout the cell because of varying rates of production and transport Devising better water management...
Ngày tải lên: 05/09/2013, 14:58
Mechanical behaviour of PEM fuel cell catalyst layers during regular cell operation
... stresses and then decay of the catalyst is more serious than that of the PEM References [1] Mehta V, Cooper JS Review and analysis of PEM fuel cell design and manufacturing Journal of Power Sources ... flooding and drying, at least locally [12] An operating fuel cell has varying local conditions of temperature, humidity, and power generation (and thereby heat generation) across the active area of ... reflects the influence of the operating parameters on fuel cell performance to investigate the in situ total displacement and degree of the deformation of the polymer membrane of PEM fuel cells ISSN...
Ngày tải lên: 05/09/2013, 14:58
A CFD analysis on the effect of ambient conditions on the hygro-thermal stresses distribution in a planar ambient airbreathing PEM fuel cell
... of temperature and humidity As a result of in the changes in temperature and moisture, the membrane, GDL and bipolar plates will all experience expansion and contraction Because of the different ... performance, the introduction of cheaper materials and fabrication techniques, and the design and development of novel architectures The difficult experimental environment of fuel cell systems has ... design and optimization of future fuel cells to improve their lifetime with a much higher power density and lower cost The analysis offers valuable physical insight towards design of a cell and...
Ngày tải lên: 05/09/2013, 14:58
Prediction of deformation and hygro-thermal stresses distribution in PEM fuel cell vehicle using threedimensional CFD model
... and optimization of fuel cells, improve long-term performance and lifetime, the introduction of cheaper materials and fabrication techniques, and the design and development of novel architectures ... displacement, and the degree of the deformation in MEA are directly related to the increasing of current density, due to increasing of heat generation This result may explain the occurrence of cracks and ... applications, and the durability of fuel cell stack components remains, in most cases, insufficiently understood Lengthy required testing times, lack of understanding of most degradation mechanisms, and...
Ngày tải lên: 05/09/2013, 14:58
A CFD analysis of transport phenomena and electrochemical reactions in a tubular-shaped PEM fuel cell
... 2.73 K), and this leads to prevent drying out of the membrane and excessive thermal stresses that may result in rupture of the membrane, and therefore less thermal management problems, and achieve ... 2.69 K), and this leads to prevent drying out of the membrane and excessive thermal stresses that may result in rupture of the membrane, and therefore less thermal management problems, and achieve ... of the processes under realistic conditions is essential to the development and optimization of fuel cells, improve long-term performance and lifetime, the introduction of cheaper materials and...
Ngày tải lên: 05/09/2013, 14:58
Performance optimization of a PEM hydrogen-oxygen fuel cell
... understanding of the phenomena inside the cell They only correlate output with input Semi-empirical models are very useful for estimating the performance of PEM fuel cell stacks and optimization of ... to the concentration drop of reactant gases, and thus inversely to the growth rate n of by-products of the electrochemical reaction in the catalyst layers, flow fields, and across the electrode ... thermodynamic efficiency of the fuel cell E fc can be determined as the ratio of output work rate W gross to the product of the hydrogen consumption rate m H and the lower heating value of hydrogen LHV...
Ngày tải lên: 05/09/2013, 14:58