The Experts below are selected from a list of 50496 Experts worldwide ranked by ideXlab platform
Rodolfo Taccani - One of the best experts on this subject based on the ideXlab platform.
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a review of waste heat recovery and organic rankine cycles orc in on off highway vehicle heavy duty diesel engine applications
Renewable & Sustainable Energy Reviews, 2017Co-Authors: Simone Lion, Constantine N Michos, Ioannis Vlaskos, Cedric Rouaud, Rodolfo TaccaniAbstract:Heavy Duty Diesel Engine (HDDE) are between the biggest contributors to CO2 emission and ambient pollution as they are the most widely used technology for commercial vehicles and ship propulsion applications, as well as, together with reciprocating gas engines, for small medium-size distributed Stationary Power generation.
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a review of waste heat recovery and organic rankine cycles orc in on off highway vehicle heavy duty diesel engine applications
Renewable & Sustainable Energy Reviews, 2017Co-Authors: Simone Lion, Constantine N Michos, Ioannis Vlaskos, Cedric Rouaud, Rodolfo TaccaniAbstract:Abstract Heavy Duty Diesel Engine (HDDE) are between the biggest contributors to CO2 emission and ambient pollution as they are the most widely used technology for commercial vehicles and ship propulsion applications, as well as, together with reciprocating gas engines, for small medium-size distributed Stationary Power generation. New emission legislations in the on and off highway sectors, such as for example EURO VI and Tier 4 final, regarding NOx and Particulate Matter (PM), are also becoming year by year more stringent. For these reasons, in the last years, concerns about further engine development and efficiency improvement are of primary importance and several technologies have been studied and implemented. This review is meant to give an overview of the Organic Rankine Cycle (ORC) technology to recover wasted thermal energy in Heavy Duty Diesel Engines (e.g. exhaust gas, EGR, coolant circuit, charge air cooling, oil circuit) with particular focus on vehicle applications for on and off highway sectors (e.g. long-haul trucks, earth-moving machines, agricultural tractors). In addition, multiple different engine operating profiles in terms of torque and speed are gathered and reported for a variety of typical vehicles, in order to characterize the best system design point for the chosen application.
Simone Lion - One of the best experts on this subject based on the ideXlab platform.
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a review of waste heat recovery and organic rankine cycles orc in on off highway vehicle heavy duty diesel engine applications
Renewable & Sustainable Energy Reviews, 2017Co-Authors: Simone Lion, Constantine N Michos, Ioannis Vlaskos, Cedric Rouaud, Rodolfo TaccaniAbstract:Heavy Duty Diesel Engine (HDDE) are between the biggest contributors to CO2 emission and ambient pollution as they are the most widely used technology for commercial vehicles and ship propulsion applications, as well as, together with reciprocating gas engines, for small medium-size distributed Stationary Power generation.
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a review of waste heat recovery and organic rankine cycles orc in on off highway vehicle heavy duty diesel engine applications
Renewable & Sustainable Energy Reviews, 2017Co-Authors: Simone Lion, Constantine N Michos, Ioannis Vlaskos, Cedric Rouaud, Rodolfo TaccaniAbstract:Abstract Heavy Duty Diesel Engine (HDDE) are between the biggest contributors to CO2 emission and ambient pollution as they are the most widely used technology for commercial vehicles and ship propulsion applications, as well as, together with reciprocating gas engines, for small medium-size distributed Stationary Power generation. New emission legislations in the on and off highway sectors, such as for example EURO VI and Tier 4 final, regarding NOx and Particulate Matter (PM), are also becoming year by year more stringent. For these reasons, in the last years, concerns about further engine development and efficiency improvement are of primary importance and several technologies have been studied and implemented. This review is meant to give an overview of the Organic Rankine Cycle (ORC) technology to recover wasted thermal energy in Heavy Duty Diesel Engines (e.g. exhaust gas, EGR, coolant circuit, charge air cooling, oil circuit) with particular focus on vehicle applications for on and off highway sectors (e.g. long-haul trucks, earth-moving machines, agricultural tractors). In addition, multiple different engine operating profiles in terms of torque and speed are gathered and reported for a variety of typical vehicles, in order to characterize the best system design point for the chosen application.
Lew Lefton - One of the best experts on this subject based on the ideXlab platform.
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penalty finite element approximations of the Stationary Power law stokes problem
Journal of Numerical Mathematics, 2003Co-Authors: Lew LeftonAbstract:Finite element approximations of the Stationary Power-law Stokes problem using penalty formulation are considered. A priori error estimates under appropriate smoothness assumptions on the solutions are established without assuming a discrete version of the BB condition. Numerical solutions are presented by implementing a nonlinear conjugate gradient method.
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a penalty method for approximations of the Stationary Power law stokes problem
Electronic Journal of Differential Equations, 2001Co-Authors: Lew LeftonAbstract:We study approximations of the steady state Stokes problem gov- erned by the Power-law model for viscous incompressible non-Newtonianflow using the penalty formulation. We establish convergence andnd error esti- mates.
Scott A Barnett - One of the best experts on this subject based on the ideXlab platform.
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a perspective on low temperature solid oxide fuel cells
Energy and Environmental Science, 2016Co-Authors: Zhan Gao, L Mogni, Elizabeth C Miller, Justin G Railsback, Scott A BarnettAbstract:This article provides a perspective on solid oxide fuel cells operating at low temperature, defined here to be the range from ∼400 °C to 650 °C. These low-temperature solid oxide fuel cells (LT-SOFCs) have seen considerable research and development and are widely viewed as the “next generation” technology, following the 650–850 °C SOFCs that are currently undergoing commercialization. LT-SOFCs have potential advantages for conventional SOFC applications such as Stationary Power generation, and may be viable for new portable and transportation Power applications, along with electrolytic fuel production and energy storage. The characteristics of electrolyte and electrode materials are reviewed, with a focus on materials that have demonstrated good properties and cell performance at low temperature. Only oxygen-ion-conducting electrolytes are considered here. Anode materials are discussed, primarily the various Ni–cermet anode compositions that yield good low-temperature performance. Mixed ionically and electronically conducting cathode materials are described in detail, reflecting the extensive research activity that has aimed at providing useful oxygen reduction kinetics at low operating temperature. Cell design, materials compatibility, processing methods, and resulting microstructures are discussed, along with their role in determining cell performance. Results from state of the art LT-SOFCs are presented, and future prospects are discussed.
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a direct methane fuel cell with a ceria based anode
Nature, 1999Co-Authors: Perry E Murray, Tsepin Tsai, Scott A BarnettAbstract:Fuel cells constitute an attractive Power-generation technology that converts chemical energy directly and with high efficiency into electricity while causing little pollution. Most fuel cells require hydrogen as the fuel, but viable near-term applications will need to use the more readily available hydrocarbons, such as methane. Present-day demonstration Power plants and planned fuel-cell electric vehicles therefore include a reformer that converts hydrocarbon fuel into hydrogen. Operating fuel cells directly on hydrocarbons would obviously eliminate the need for such a reformer and improve efficiency. In the case of polymer-electrolyte fuel cells, which have been studied for vehicle applications, the direct use of methanol fuel has been reported, but resulted in fuel permeating the electrolyte1,2. Solid oxide fuel cells — promising candidates for Stationary Power generation — can also use hydrocarbon fuel directly to generate energy, but this mode of operation resulted in either carbon deposition at high temperatures or poor Power output at low operating temperatures3,4,5. Here we report the direct electrochemical oxidation of methane in solid oxide fuel cells that generate Power densities upto 0.37 W cm−2 at 650 °C. This performance is comparable to that of fuel cells using hydrogen6,7 and is achieved by using ceria-containing anodes and low operating temperatures to avoid carbon deposition. We expect that the incorporation of more advanced cathodes would further improve the performance of our cells, making this solid oxide fuel cell a promising candidate for practical and efficient fuel-cell applications.
Cedric Rouaud - One of the best experts on this subject based on the ideXlab platform.
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a review of waste heat recovery and organic rankine cycles orc in on off highway vehicle heavy duty diesel engine applications
Renewable & Sustainable Energy Reviews, 2017Co-Authors: Simone Lion, Constantine N Michos, Ioannis Vlaskos, Cedric Rouaud, Rodolfo TaccaniAbstract:Heavy Duty Diesel Engine (HDDE) are between the biggest contributors to CO2 emission and ambient pollution as they are the most widely used technology for commercial vehicles and ship propulsion applications, as well as, together with reciprocating gas engines, for small medium-size distributed Stationary Power generation.
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a review of waste heat recovery and organic rankine cycles orc in on off highway vehicle heavy duty diesel engine applications
Renewable & Sustainable Energy Reviews, 2017Co-Authors: Simone Lion, Constantine N Michos, Ioannis Vlaskos, Cedric Rouaud, Rodolfo TaccaniAbstract:Abstract Heavy Duty Diesel Engine (HDDE) are between the biggest contributors to CO2 emission and ambient pollution as they are the most widely used technology for commercial vehicles and ship propulsion applications, as well as, together with reciprocating gas engines, for small medium-size distributed Stationary Power generation. New emission legislations in the on and off highway sectors, such as for example EURO VI and Tier 4 final, regarding NOx and Particulate Matter (PM), are also becoming year by year more stringent. For these reasons, in the last years, concerns about further engine development and efficiency improvement are of primary importance and several technologies have been studied and implemented. This review is meant to give an overview of the Organic Rankine Cycle (ORC) technology to recover wasted thermal energy in Heavy Duty Diesel Engines (e.g. exhaust gas, EGR, coolant circuit, charge air cooling, oil circuit) with particular focus on vehicle applications for on and off highway sectors (e.g. long-haul trucks, earth-moving machines, agricultural tractors). In addition, multiple different engine operating profiles in terms of torque and speed are gathered and reported for a variety of typical vehicles, in order to characterize the best system design point for the chosen application.