The Experts below are selected from a list of 108 Experts worldwide ranked by ideXlab platform

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

  • equilibrium modeling of gasification gibbs free Energy minimization approach and its application to spouted bed and spout fluid bed gasifiers
    Energy Conversion and Management, 2008
    Co-Authors: S Jarungthammachote, Animesh Dutta
    Abstract:

    Spouted beds have been found in many applications, one of which is gasification. In this paper, the gasification processes of conventional and modified spouted bed gasifiers were considered. The conventional spouted bed is a central jet spouted bed, while the modified spouted beds are circular split spouted bed and spout-fluid bed. The Gibbs free Energy minimization method was used to predict the composition of the producer gas. The major six components, CO, CO2, CH4, H2O, H2 and N2, were determined in the mixture of the producer gas. The results showed that the carbon conversion in the gasification process plays an important role in the model. A modified model was developed by considering the carbon conversion in the constraint equations and in the Energy Balance Calculation. The results from the modified model showed improvements. The higher heating values (HHV) were also calculated and compared with the ones from experiments. The agreements of the calculated and experimental values of HHV, especially in the case of the circular split spouted bed and the spout-fluid bed were observed.

Reinaldo Antonio Cardoso - One of the best experts on this subject based on the ideXlab platform.

  • Energy efficiency improvement in an ethylene plant propylene refrigeration cycle (C3R)
    Applied Petrochemical Research, 2017
    Co-Authors: Delano Mendes Santana, Anderson Luis Cassinoni Oliveira, Evelyn Kraneck, Thais Helena A. Bierrenbach Camargo, Reinaldo Antonio Cardoso
    Abstract:

    A typical refrigeration cycle in an ethylene plant utilizes propene as fluid. When C3R is still in the warm zone, there is some process heat exchangers that leave it sub-cooled. This creates the opportunity for operational improvement in these systems which will result in less parasite steam formation on cycle expansion zone. The objective is analyze this Energy efficiency improvement opportunity, showing the financial and Energy earnings. The methodology applied to achieve this improvement in the Energy efficiency of this cycle is based on: mass and Energy Balance Calculation, design data comparison, and analysis of differences between the actual values and the design reference. An action plan was developed with necessary implementation steps and earnings Calculations. The annual amount realized was around one million dollars in 2015. In terms of natural resources, this work is bringing an average reduction of 1.07 kg/s of steam, representing an amount of approximately 2.12 MW. This gain is about 2% of the turbine consumption. This framework can be applied at any Ethylene plant that has the similar equipments.

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

  • equilibrium modeling of gasification gibbs free Energy minimization approach and its application to spouted bed and spout fluid bed gasifiers
    Energy Conversion and Management, 2008
    Co-Authors: S Jarungthammachote, Animesh Dutta
    Abstract:

    Spouted beds have been found in many applications, one of which is gasification. In this paper, the gasification processes of conventional and modified spouted bed gasifiers were considered. The conventional spouted bed is a central jet spouted bed, while the modified spouted beds are circular split spouted bed and spout-fluid bed. The Gibbs free Energy minimization method was used to predict the composition of the producer gas. The major six components, CO, CO2, CH4, H2O, H2 and N2, were determined in the mixture of the producer gas. The results showed that the carbon conversion in the gasification process plays an important role in the model. A modified model was developed by considering the carbon conversion in the constraint equations and in the Energy Balance Calculation. The results from the modified model showed improvements. The higher heating values (HHV) were also calculated and compared with the ones from experiments. The agreements of the calculated and experimental values of HHV, especially in the case of the circular split spouted bed and the spout-fluid bed were observed.

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

  • SCIS&ISIS - Predictive simulation of smart grid network system
    The 6th International Conference on Soft Computing and Intelligent Systems and The 13th International Symposium on Advanced Intelligence Systems, 2012
    Co-Authors: Hongyu Huang, Noriyuki Kobayashi, Kazuto Yukita, Yong Cheng, Zhaohong He, Haoran Yuan
    Abstract:

    In this study, a combined complex smart grid consisting of gas engine (heat), fuel cell, solar power plant, wind power plant, small hydroelectric plant, end users (LED, EV, secondary battery, factory, etc.) was proposed and evaluated by modeling simulation and estimating the benefits due to Energy Balance Calculation.

  • Predictive simulation of smart grid network system
    The 6th International Conference on Soft Computing and Intelligent Systems and The 13th International Symposium on Advanced Intelligence Systems, 2012
    Co-Authors: Hongyu Huang, Noriyuki Kobayashi, Kazuto Yukita, Yong Cheng, Zhaohong He, Haoran Yuan
    Abstract:

    In this study, a combined complex smart grid consisting of gas engine (heat), fuel cell, solar power plant, wind power plant, small hydroelectric plant, end users (LED, EV, secondary battery, factory, etc.) was proposed and evaluated by modeling simulation and estimating the benefits due to Energy Balance Calculation.

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

  • biogas production from supernatant of hydrothermally treated municipal sludge by upflow anaerobic sludge blanket reactor
    Bioresource Technology, 2011
    Co-Authors: Wei Qiao, Chong Peng, Wei Wang, Zhongzhi Zhang
    Abstract:

    Abstract The supernatant of hydrothermally treated sludge was treated by an upflow anaerobic sludge blanket (UASB) reactor for a 550-days running test. The hydrothermal parameter was 170 °C for 60 min. An mesophilic 8.6 L UASB reactor was seeded with floc sludge. The final organic loading rate (OLR) could reach 18 kg COD/m 3  d. At the initial stage running for 189 days, the feed supernatant was diluted, and the OLR reached 11 kg COD/m 3  d. After 218 days, the reactor achieved a high OLR, and the supernatant was pumped into the reactor without dilution. The influent COD fluctuated from 20,000 to 30,000 mg/L and the COD removal rate remained at approximately 70%. After 150 days, granular sludge was observed. The Energy Balance Calculation show that heating 1.0 kg sludge needs 0.34 MJ of Energy, whereas biogas Energy from the supernatant of the heated sludge is 0.43 MJ.