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    Dual Actuator Control Strategy for Temperature Stability in High-Temperature Solar Receivers

    Source: Journal of Solar Energy Engineering:;2025:;volume( 147 ):;issue: 004::page 41002-1
    Author:
    Verstraete, Sofie
    ,
    Abedini, Hamed
    ,
    Alsahlani, Assaad
    ,
    Ophoff, Cedric
    ,
    Ozalp, Nesrin
    DOI: 10.1115/1.4067666
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Fluctuations in incoming solar energy adversely affect the temperature stability within solar receivers, leading to a decrease in thermal efficiency. Therefore, it is essential to design a control system with the capability to maintain quasi-steady temperatures inside the reactor consistently throughout the day. This study introduces a dual-actuator control technology to regulate the temperature within a high-temperature cylindrical cavity-type gas receiver. The actuating system comprises two primary components. The first component involves a variable aperture mechanism, executed through a rotary mechanism made of stainless steel. This mechanism features seven holes of fixed diameters arranged in a half-circle configuration. The rotary mechanism is powered by a stepper motor regulated by a feedback control system. The second actuator is a mass flow controller (MFC) responsible for meticulous adjustment of the inlet gas flow directed toward the solar receiver. The direct normal irradiance (DNI) is simulated using a 10 kW high-flux solar simulator (HFSS) with a variable power supply ranging from 80 to 200 A. This setup enables the simulation of different operational conditions. The dual-actuator method concurrently adjusts both gas flowrate and aperture size. While utilizing each of these methods individually can achieve reasonable temperature control performance, the hybrid approach leverages the strengths of both control methods, resulting in a significant improvement in the temperature regulation performance of the solar receiver. Two control strategies, namely, proportional integral (PI) and model predictive control (MPC), were implemented to regulate the temperature inside a cavity-type gas receiver. Experimental tests indicate that the incorporating the dual-actuator controller is a promising technique, and its application can be extended to include additional parameters for utilization in a multi-input multi-output (MIMO) control system.
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      Dual Actuator Control Strategy for Temperature Stability in High-Temperature Solar Receivers

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4306216
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    • Journal of Solar Energy Engineering

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    contributor authorVerstraete, Sofie
    contributor authorAbedini, Hamed
    contributor authorAlsahlani, Assaad
    contributor authorOphoff, Cedric
    contributor authorOzalp, Nesrin
    date accessioned2025-04-21T10:26:51Z
    date available2025-04-21T10:26:51Z
    date copyright2/14/2025 12:00:00 AM
    date issued2025
    identifier issn0199-6231
    identifier othersol-24-1252.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4306216
    description abstractFluctuations in incoming solar energy adversely affect the temperature stability within solar receivers, leading to a decrease in thermal efficiency. Therefore, it is essential to design a control system with the capability to maintain quasi-steady temperatures inside the reactor consistently throughout the day. This study introduces a dual-actuator control technology to regulate the temperature within a high-temperature cylindrical cavity-type gas receiver. The actuating system comprises two primary components. The first component involves a variable aperture mechanism, executed through a rotary mechanism made of stainless steel. This mechanism features seven holes of fixed diameters arranged in a half-circle configuration. The rotary mechanism is powered by a stepper motor regulated by a feedback control system. The second actuator is a mass flow controller (MFC) responsible for meticulous adjustment of the inlet gas flow directed toward the solar receiver. The direct normal irradiance (DNI) is simulated using a 10 kW high-flux solar simulator (HFSS) with a variable power supply ranging from 80 to 200 A. This setup enables the simulation of different operational conditions. The dual-actuator method concurrently adjusts both gas flowrate and aperture size. While utilizing each of these methods individually can achieve reasonable temperature control performance, the hybrid approach leverages the strengths of both control methods, resulting in a significant improvement in the temperature regulation performance of the solar receiver. Two control strategies, namely, proportional integral (PI) and model predictive control (MPC), were implemented to regulate the temperature inside a cavity-type gas receiver. Experimental tests indicate that the incorporating the dual-actuator controller is a promising technique, and its application can be extended to include additional parameters for utilization in a multi-input multi-output (MIMO) control system.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDual Actuator Control Strategy for Temperature Stability in High-Temperature Solar Receivers
    typeJournal Paper
    journal volume147
    journal issue4
    journal titleJournal of Solar Energy Engineering
    identifier doi10.1115/1.4067666
    journal fristpage41002-1
    journal lastpage41002-10
    page10
    treeJournal of Solar Energy Engineering:;2025:;volume( 147 ):;issue: 004
    contenttypeFulltext
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