The Experts below are selected from a list of 118461 Experts worldwide ranked by ideXlab platform

Panos Y Papalambros - One of the best experts on this subject based on the ideXlab platform.

  • engine optimal Operation Lines for power split hybrid electric vehicles
    Proceedings of the Institution of Mechanical Engineers Part D: Journal of Automobile Engineering, 2009
    Co-Authors: Kukhyun Ahn, Panos Y Papalambros
    Abstract:

    AbstractThe powertrain of a hybrid electric vehicle (HEV) can be operated in either a power-boosting or an energy-saving mode. The first mode is used for responding to the driver's full-load demand and the second for achieving high fuel efficiency given an increased number of degrees of freedom in energy management. Optimization problems for the two Operation modes are formulated, and the design spaces are analysed for general power-split architectures. Optimization results are presented and analysed for input-split and compound-split architectures. The analysis leads to the definition of a new concept of HEV optimal Operation that improves the conventional idea of engine optimal Operation Line.

  • engine optimal Operation Lines for power split hybrid electric vehicles
    Proceedings of the Institution of Mechanical Engineers Part D: Journal of Automobile Engineering, 2009
    Co-Authors: Kukhyun Ahn, Panos Y Papalambros
    Abstract:

    AbstractThe powertrain of a hybrid electric vehicle (HEV) can be operated in either a power-boosting or an energy-saving mode. The first mode is used for responding to the driver's full-load demand and the second for achieving high fuel efficiency given an increased number of degrees of freedom in energy management. Optimization problems for the two Operation modes are formulated, and the design spaces are analysed for general power-split architectures. Optimization results are presented and analysed for input-split and compound-split architectures. The analysis leads to the definition of a new concept of HEV optimal Operation that improves the conventional idea of engine optimal Operation Line.

Kukhyun Ahn - One of the best experts on this subject based on the ideXlab platform.

  • engine optimal Operation Lines for power split hybrid electric vehicles
    Proceedings of the Institution of Mechanical Engineers Part D: Journal of Automobile Engineering, 2009
    Co-Authors: Kukhyun Ahn, Panos Y Papalambros
    Abstract:

    AbstractThe powertrain of a hybrid electric vehicle (HEV) can be operated in either a power-boosting or an energy-saving mode. The first mode is used for responding to the driver's full-load demand and the second for achieving high fuel efficiency given an increased number of degrees of freedom in energy management. Optimization problems for the two Operation modes are formulated, and the design spaces are analysed for general power-split architectures. Optimization results are presented and analysed for input-split and compound-split architectures. The analysis leads to the definition of a new concept of HEV optimal Operation that improves the conventional idea of engine optimal Operation Line.

  • engine optimal Operation Lines for power split hybrid electric vehicles
    Proceedings of the Institution of Mechanical Engineers Part D: Journal of Automobile Engineering, 2009
    Co-Authors: Kukhyun Ahn, Panos Y Papalambros
    Abstract:

    AbstractThe powertrain of a hybrid electric vehicle (HEV) can be operated in either a power-boosting or an energy-saving mode. The first mode is used for responding to the driver's full-load demand and the second for achieving high fuel efficiency given an increased number of degrees of freedom in energy management. Optimization problems for the two Operation modes are formulated, and the design spaces are analysed for general power-split architectures. Optimization results are presented and analysed for input-split and compound-split architectures. The analysis leads to the definition of a new concept of HEV optimal Operation that improves the conventional idea of engine optimal Operation Line.

Pio A Aguirre - One of the best experts on this subject based on the ideXlab platform.

  • modeling synthesis and optimization of heat exchanger networks application to fuel processing systems for pem fuel cells
    International Journal of Hydrogen Energy, 2011
    Co-Authors: Diego G Oliva, Javier A Francesconi, Miguel C Mussati, Pio A Aguirre
    Abstract:

    Abstract The development of biofuels has gained much attention in recent years. Thermodynamic analyses to obtain energy from biofuels using fuel cells were addressed in previous works for a variety of processes. In those processes, the determination of the best conditions to achieve high efficiency values in the conversion of chemical energy into electrical power is a critical issue from the net global energy efficiency point of view. In this regard, a main aspect is to address the energy integration of the whole process. In a previous paper, the authors dealt with energy integration studies for glycerin- and ethanol-based processors coupled to PEM fuel cells resorting on the “multi-stream heat exchanger” feature provided by the simulation tool HYSYS. In that work, the aim was to maximize the energy recovery from the process streams that renders the maximum achievable net global efficiency. In this paper, the aim is to synthesize and design the optimal heat exchangers network (i.e. determination of the process configuration and units sizes) while maintaining the net global efficiency of the whole system at its achievable value. Three modifications to the original SYNHEAT model developed in 1990 by Yee and Grossmann for synthesizing heat exchanger networks are proposed in this work aiming at a better problem description, and consequently searching for best problem solutions. First, a modification in computing the minimum approach temperature difference is proposed. Second, the called “Operation Line method” is coupled to the SYNHEAT model to built-up the network superstructure to be optimized. Finally, the SYNHEAT model’s hypothesis of constant cp value for modeling heat exchange between process streams is improved by considering enthalpy variable instead of temperature variable, which is convenient when latent heat is transferred. The model variables number involved in the heat exchanger network synthesis problems solved has been reduced to less than a half by applying the Operation Line method. The proposed methodology and modifications made are of general application and not just for the specific cases addressed in this work.

Jing Penghui - One of the best experts on this subject based on the ideXlab platform.

  • plug in hybrid electric vehicle energy saving predictive control method based on optimal engine Operation Line
    2014
    Co-Authors: Yu Kaijiang, Xu Xiaozhuo, Yang Junqi, Gao Ruxin, Su Shan, Zhang Hongwei, Wang Li, Jing Penghui
    Abstract:

    The invention relates to a plug-in hybrid electric vehicle energy-saving predictive control method based on an optimal engine Operation Line, in particular to an optimal real-time plug-in hybrid electric vehicle control method. The method comprises the first step of determining the optimal engine Operation Line, the second step of performing vehicle modeling, the third step of formulating a control strategy, the fourth step of performing onLine optimal control, the fifth step of adjusting weight parameters and the sixth step of judging whether a goal is achieved, wherein the energy flow of a plug-in hybrid electric vehicle can be adjusted and optimized on Line without knowing all driving conditions of the vehicle in the future. The plug-in hybrid electric vehicle energy-saving predictive control method is different from a traditional method that all the driving conditions of a vehicle need to be known. The control strategy of the energy of a storage battery is adopted as much as possible so that the advantage that the capacity of the storage battery of the plug-in hybrid electric vehicle is large can be better utilized, and more free regenerative braking energy can be recovered. Various running modes such as an electric mode, a regenerative braking mode, an engine charging mode and an engine and motor CVT hybrid drive mode of the plug-in hybrid electric vehicle can be achieved by utilizing the algorithm put forward. By the application of the method, the fuel economy and the emission performance of the plug-in hybrid electric vehicle can be substantially improved.

Shizhe Huang - One of the best experts on this subject based on the ideXlab platform.

  • method for putting reclosing of 110 kv double Lines with parallel Operation into service and Line for putting reclosing into service
    2012
    Co-Authors: Yanping Chen, Xiaolong Song, Shizhe Huang
    Abstract:

    The invention, which relates to the power equipment Operation technology filed, discloses a method for putting reclosing of 110 KV double Lines with parallel Operation into service and a Line for putting reclosing into service. According to the method, it is changed that a Line is under a power side switch reclosing mode for putting into service. The Line for putting reclosing into service comprises: an Operation Line L1 and an Operation Line L2; power supply sides of the Operation Line L1 and the Operation Line L2 are connected with a bus 110KVM1; and load sides of the Operation Line L1 and the Operation Line L2 are connected with a bus 110 KV M2. A power supply side breaker D1 of the Line L1 is in a reclosing putting detection pressure-free mode W and a load side breaker D2 is in a reclosing putting asynchronous mode F. A power side breaker D3 of the Operation Line L2 is in the reclosing putting detection pressure-free mode W and a load side breaker D4 of the Operation Line is in the reclosing putting asynchronous mode F. According to the invention, power delivery for users can be recovered timely and reliable power supply for users can be ensured; losses can be reduced and reliability of power supply of the power system can be improved.