Optimization of an auto-thermal ammonia synthesis reactor using cyclic coordinate method

Nguyen, Thi-Cam-Thu; Nguyen, Tuan-Anh; Vu, Thanh Dinh; Nguyen, K. T.; Dao, T. K-T; Huynh, Ky-Phuong-Ha

doi:10.1088/1757-899x/206/1/012059

Cited by 9 publications

(2 citation statements)

References 5 publications

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“…The optimization model Equation () can be solved by the coordinate rotation method. The method is suitable for nonlinear optimization and has no need to solve the gradient of the objective function 32 . The process of utilizing the coordinate rotation method to optimize the improved OGRM strategy for wind turbines is illustrated as Figure 3.…”

Section: Improved Ogrm Strategy For Wind Turbinesmentioning

confidence: 99%

An improved opportunistic group replacement maintenance strategy for wind turbines

Wang

et al. 2020

Energy Science & Engineering

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Section: Improved Ogrm Strategy For Wind Turbinesmentioning

confidence: 99%

An improved opportunistic group replacement maintenance strategy for wind turbines

Wang

et al. 2020

Energy Science & Engineering

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“…Meanwhile, the objective function C t is complex, the gradient of which is difficult to solve. The coordinate rotation method has no need for solving the gradient and can transform the simultaneous optimisation of multiple variables into the optimisation of single variable in sequence [29]. This method is suitable for solving the current optimisation model.…”

Section: Enhanced Pom Strategy For Wind Turbinesmentioning

confidence: 99%

Enhanced POM strategy and its application to wind turbines

Wang

Teng

2019

IET Renewable Power Generation

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Deficiencies exist during applying the traditional preventive opportunistic maintenance (POM) strategy to wind turbines. For example, its rough cost analysis only provides a total instead of the staged cost of once maintenance, which cannot give precise cost composition. Setting identical thresholds for all subassemblies reduces the potential of cost saving etc. An enhanced POM strategy for wind turbines is presented in this study with the consideration of maintenance modes including no maintenance, imperfect maintenance and replacement. The reliability variations of subassemblies under different maintenance modes are described by Weibull distribution with an age reduction factor. On the basis of reliability variations, a formula is proposed to uniformly compute maintenance cost under each maintenance mode via subdividing the cost in the light of diverse maintenance stages. An integrated objective function minimising the maintenance cost is established and solved, where reliability thresholds of each subassembly are separately set as optimisation variables. The enhanced POM strategy is applied to a wind farm in North China, verifying its effectiveness. k s under the imperfect maintenance T cum cumulative operating time IET Renew. Power Gener.

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Reactor Design, Modelling and Process Intensification for Ammonia Synthesis

Rossetti

2020

Green Energy and Technology

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Optimization of an auto-thermal ammonia synthesis reactor using cyclic coordinate method

Cited by 9 publications

References 5 publications

An improved opportunistic group replacement maintenance strategy for wind turbines

An improved opportunistic group replacement maintenance strategy for wind turbines

Enhanced POM strategy and its application to wind turbines

Reactor Design, Modelling and Process Intensification for Ammonia Synthesis

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