The Experts below are selected from a list of 55056 Experts worldwide ranked by ideXlab platform

Zhenping Feng - One of the best experts on this subject based on the ideXlab platform.

  • Numerical study on the Thermal characteristics in a tubular solid oxide fuel cell with indirect internal reformer
    International Journal of Thermal Sciences, 2009
    Co-Authors: Xiongwen Zhang, Zhenping Feng
    Abstract:

    Abstract Numerical simulation was implemented on a tubular solid oxide fuel cell (SOFC) with indirect internal reformer used in the demonstration projects of Siemens–Westinghouse. The Navier–Stokes equations and the charge equation were solved by means of a generalized, three-dimensional complete polarization electrochemical model for SOFC. The distributions of both the molar fraction of gaseous species and the temperature were presented. The characteristic of Thermal Energy Generation was analyzed based on the simulation results. The electrochemical process was exothermic reaction, which contributed 82.7% in the total heat Generation. The ohmic heat possessed 17.3% in the total heat Generation. About 47.3% of the generated heat in the cell was absorbed by the reforming reaction. The air flow took away 36.6% the generated heat and the remainder 16% was taken away by the fuel flow.

Nilay Shah - One of the best experts on this subject based on the ideXlab platform.

  • integration of biomass into urban Energy systems for heat and power part i an milp based spatial optimization methodology
    Energy Conversion and Management, 2014
    Co-Authors: Antonio M Pantaleo, Sara Giarola, Ausilio Aue, Nilay Shah
    Abstract:

    The paper presents a mixed integer linear programming (MILP) approach to optimize multi-biomass and natural gas supply chain strategic design for heat and power Generation in urban areas. The focus is on spatial and temporal allocation of biomass supply, storage, processing, transport and Energy conversion (heat and CHP) to match the heat demand of residential end users. The main aim lies on the representation of the relationships between the biomass processing and biofuel Energy conversion steps, and on the trade-offs between centralized district heating plants and local heat Generation systems. After a description of state of the art and research trends in urban Energy systems and bioEnergy modelling, an application of the methodology to a generic case study is proposed. With the assumed techno-economic parameters, biomass based Thermal Energy Generation results competitive with natural gas, while district heating network results the main option for urban areas with high Thermal Energy demand density. Potential further applications of this model are also described, together with main barriers for development of bioEnergy routes for urban areas.

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

  • CFD Modeling of SOFC CoGeneration System for Building Application
    Energy Procedia, 2017
    Co-Authors: Tushar Choudhary, Mithilesh Kumar Sahu, Sanjay
    Abstract:

    Abstract This paper focuses on CFD modeling of Solid oxide fuel cell (SOFC) which is coupled with co-Generation system. The SOFC coGeneration system is a low emission and Energy efficient combined heat and power (CHP) is a most promising candidate in the field of electric and Thermal Energy Generation technology for execution in future commercial buildings. Using finite volume approach CFD modeling of SOFC has been carried out by using commercial software COMSOL 4.3.1. The performance characteristic of an SOFC has been examined by performing parametric analysis. The effect of fuel utilization factor, recirculation ratio, operating temperature significantly affects the cell performance. It has been observed that, internal reforming is advantageous over the external reforming system in terms of thermo-economics and power supply.

Jun Wang - One of the best experts on this subject based on the ideXlab platform.

  • optimal operation for integrated Energy system considering Thermal inertia of district heating network and buildings
    Applied Energy, 2017
    Co-Authors: Wei Gu, Jun Wang, Shuai Lu, Chenyu Wu
    Abstract:

    The use of wind power is often restricted by the strong interdependence between the electricity Generation and Thermal Energy Generation of combined heat and power units (CHP), especially during winter, when CHP operates according to the heat-led mode. Considering the strong temporal and spatial correlations between wind power and Thermal demand, the heating system can provide margins for wind power accommodation from the perspective of overall Energy consumption. This paper proposes an optimal operation model for an integrated Energy system (IES) combining the Thermal inertia of a district heating network (DHN) and buildings to enhance the absorption of wind power. The temperature dynamics and transmission delay in DHN and the Thermal storage capacity of buildings are studied to exploit the heating system as an option for managing the dispatch of wind power. The proposed model is a mixed integer non-linear programming model and can be solved by general commercial optimization software. To illustrate the effectiveness of the proposed model, a real heating system (having 24 nodes and 50 pipelines) in Jilin Province is used in the case study. The simulation results demonstrate the benefits of the proposed model in terms of operational economics and wind power utilization.

  • optimal operation for integrated Energy system considering Thermal inertia of district heating network and buildings
    Applied Energy, 2017
    Co-Authors: Jun Wang, Zhao Luo
    Abstract:

    The use of wind power is often restricted by the strong interdependence between the electricity Generation and Thermal Energy Generation of combined heat and power units (CHP), especially during winter, when CHP operates according to the heat-led mode. Considering the strong temporal and spatial correlations between wind power and Thermal demand, the heating system can provide margins for wind power accommodation from the perspective of overall Energy consumption. This paper proposes an optimal operation model for an integrated Energy system (IES) combining the Thermal inertia of a district heating network (DHN) and buildings to enhance the absorption of wind power. The temperature dynamics and transmission delay in DHN and the Thermal storage capacity of buildings are studied to exploit the heating system as an option for managing the dispatch of wind power. The proposed model is a mixed integer non-linear programming model and can be solved by general commercial optimization software. To illustrate the effectiveness of the proposed model, a real heating system (having 24 nodes and 50 pipelines) in Jilin Province is used in the case study. The simulation results demonstrate the benefits of the proposed model in terms of operational economics and wind power utilization.

Xiongwen Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Numerical study on the Thermal characteristics in a tubular solid oxide fuel cell with indirect internal reformer
    International Journal of Thermal Sciences, 2009
    Co-Authors: Xiongwen Zhang, Zhenping Feng
    Abstract:

    Abstract Numerical simulation was implemented on a tubular solid oxide fuel cell (SOFC) with indirect internal reformer used in the demonstration projects of Siemens–Westinghouse. The Navier–Stokes equations and the charge equation were solved by means of a generalized, three-dimensional complete polarization electrochemical model for SOFC. The distributions of both the molar fraction of gaseous species and the temperature were presented. The characteristic of Thermal Energy Generation was analyzed based on the simulation results. The electrochemical process was exothermic reaction, which contributed 82.7% in the total heat Generation. The ohmic heat possessed 17.3% in the total heat Generation. About 47.3% of the generated heat in the cell was absorbed by the reforming reaction. The air flow took away 36.6% the generated heat and the remainder 16% was taken away by the fuel flow.