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Optimization of a Heat Exchanger Using an ARM Core Intelligent Algorithm 被引量:3
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作者 Yajuan Jia Juanjuan Wang lisha shang 《Fluid Dynamics & Materials Processing》 EI 2020年第5期871-882,共12页
In order to optimize heat transfer in a heat exchanger using an ARM(advanced RISC machine)core intelligent computer algorithm,a new type of controller has been designed.The whole control structure of the heat exchange... In order to optimize heat transfer in a heat exchanger using an ARM(advanced RISC machine)core intelligent computer algorithm,a new type of controller has been designed.The whole control structure of the heat exchange unit has been conceived on the basis of seven functional modules,including data processing and output,human-computer interaction,alarm,and data communication.The main controller and communication controller have been used in a combined fashion and a new MCU(micro control unit)system scheme has been proposed accordingly.A fuzzy controller has been designed by using a fuzzy control algorithm,and a new mode of heat transfer for the heat exchanger has been implemented by combining the fuzzy controller and the PID(proportioning integral derivative)controller.Finally,the model has been applied to an actual heat exchange station to test and verify the performances of the new approach. 展开更多
关键词 ARM heat exchanger fuzzy control algorithm communication controller PID controller
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A Genetic Algorithm for Optimizing Yaw Operation Control in Wind Power Plants
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作者 lisha shang Yajuan Jia +2 位作者 Liming Zheng Erna Shi Min Sun 《Fluid Dynamics & Materials Processing》 EI 2022年第3期511-519,共9页
A genetic algorithm is proposed to optimize the yaw control system used for the stable and efficient operation of turbines in wind power plants.In particular,the factors that produce yaw static deviation are analyzed.... A genetic algorithm is proposed to optimize the yaw control system used for the stable and efficient operation of turbines in wind power plants.In particular,the factors that produce yaw static deviation are analyzed.Then,the sought optimization method for the yaw static deviation of the wind turbine is implemented by using a lidar wind meter in the engine room in order to solve the low accuracy problem caused by yaw static deviation.It is shown that fuzzy control can overcome problematic factors such as the randomness of wind direction and track the change of wind direction accurately.Power control implementation is simple,as only the voltage and current of the generator need to be measured. 展开更多
关键词 Genetic algorithm yaw control system power control the control strategy
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CFD Analysis of Fluid-Dynamic and Heat Transfer Effects Generated by a Fixed Electricity Transmission Line Interacting with an External Wind
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作者 Yajuan Jia lisha shang +2 位作者 Jiangping Nan Guangping Hu Zhigang Fang 《Fluid Dynamics & Materials Processing》 EI 2022年第2期329-344,共16页
The flow past a fixed single transmission conductor and the related heat transfer characteristics are investigated using computational fluid dynamics and a relevant turbulence model.After validating the method through... The flow past a fixed single transmission conductor and the related heat transfer characteristics are investigated using computational fluid dynamics and a relevant turbulence model.After validating the method through comparison with relevant results in the literature,this thermofluid-dynamic problem is addressed considering different working conditions.It is shown that the resistance coefficient depends on the Reynolds number.As expected,the Nusselt number is also affected by Reynolds number.In particular,the Nusselt number under constant heat flux is always greater than that under a constant wall temperature. 展开更多
关键词 Flow characteristics heat transfer characteristics fluid mechanics Reynolds number
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