Energy efficient design and control of cleanroom environment control systems in subtropical regions – A comparative analysis and on-site validation

Shan, Kui; Wang, Shengwei

doi:10.1016/j.apenergy.2017.07.050

Cited by 33 publications

(7 citation statements)

References 19 publications

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“…Durante la etapa de diseño del sistema de climatización se tienen en cuenta las características constructivas del local, el servicio que se va a prestar, la ocupación, la ubicación geográfica y otras importantes consideraciones (ASHRAE, 1997;Yin et al, 2016;Vakiloroaya et al, 2014;Barros et al, 2017;Shan y Shengwei, 2017); sin embargo, para los locales comerciales de pequeñas dimensiones el criterio económico es un factor determinante en la selección del sistema de climatización. En Cuba, las empresas encargadas de la instalación de los sistemas de climatización solo determinan la carga térmica puntual en un día cualquiera del año y seleccionan un esquema de clima que supere dicho valor, desatendiendo así la variabilidad que tiene el clima en las diferentes épocas del año.…”

Section: Evaluación De La Climatización En Locales Comerciales Integunclassified

Evaluación de la Climatización en Locales Comerciales, Integrando Técnicas de Termografía, Simulación y Modelado por Elementos Finitos

et al. 2018

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Section: Evaluación De La Climatización En Locales Comerciales Integunclassified

Evaluación de la Climatización en Locales Comerciales, Integrando Técnicas de Termografía, Simulación y Modelado por Elementos Finitos

et al. 2018

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“…According to Tschudi et al [2], as well as Zhuang et al [3], this range is wider and equals 10 ÷ 100%. Shan and Wang [4], as well as Tsao et al [5,6], report that the percentage of energy consumption by HVAC systems in factories with advanced technologies equals 30 ÷ 65%, while, according to Hu et al [7] and Zhao et al [8], the percentage for cleanrooms with semiconductor manufacturing equals 40 ÷ 50% of the total energy consumption. Highenergy inputs for air conditioning for cleanrooms inspire research aimed to reduce the energy consumption.…”

Section: Introductionmentioning

confidence: 99%

“…Shan and Wang [4] presented simulation results for three typical options of the structure of the HVAC system for cleanrooms in the pharmaceutical industry: "Interactive option", "Partially decoupled option" and "Fully decoupled option". They proved, for the chosen application, that using the "Partially decoupled option" made it possible to reduce the consumption of electricity and gas for cooling and heating by 69.8% and 87.8%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Energy-Optimal Structures of HVAC System for Cleanrooms as a Function of Key Constant Parameters and External Climate

Porowski

Jakubiak

2022

Energies

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This article presents approximating relations defining energy-optimal structures of the HVAC (Heating, Ventilation, Air Conditioning) system for cleanrooms as a function of key constant parameters and energy-optimal control algorithms for various options of heat recovery and external climates. The annual unit primary energy demand of the HVAC system for thermodynamic air treatment was adopted as the objective function. Research was performed for wide representative variability ranges of key constant parameters: cleanliness class—Cs (ISO5÷ISO8), unit cooling loads —q˙j (100 ÷ 500) W/m2 and percentage of outdoor air—αo (5 ÷ 100)%. HVAC systems are described with vectors x¯ with coordinates defined by constant parameters and decision variables, and the results are presented in the form of approximating functions illustrating zones of energy-optimal structures of the HVAC system x¯* = f (Cs, q˙j, αo). In the optimization procedure, the type of heat recovery as an element of optimal structures of the HVAC system and algorithms of energy-optimal control were defined based on an objective function and simulation models. It was proven that using heat recovery is profitable only for HVAC systems without recirculation and with internal recirculation (savings of 5 ÷ 66%, depending on the type of heat recovery and the climate), while it is not profitable (or generates losses) for HVAC systems with external recirculation or external and internal recirculation at the same time.

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“…One problem is there are many disturbances in cleanroom system, such as open and close of the door, the periodic change between occupied time and unoccupied time, and so on. These disturbances can cause the pressure difference frequent vibration, long responding time and big overshot [8]. Another problem is that almost all cleanrooms have the high design pressure difference for maintaining manufacturing circumstance, this causes huge energy waste [9].…”

Section: Introductionmentioning

confidence: 99%

Pressure Gradient Control Strategies Based on Disturbance Rejection for Typical Pharmaceutical Cleanrooms

Chunwang¹,

Ma²,

Huang³

2021

WJET

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Keeping pressure gradient is an excellent approach to prevent the reveal of airflow direction and cross infection in manufacturing circumstances of pharmaceutical cleanrooms, thus how to keep cleanroom's pressure is critical. In the paper, we study a positive pressure pharmaceutical cleanroom system which is composed by a cleanroom and an airlock. We divide the system's disturbances into step disturbance, ramp disturbance and sine wave disturbance. We design its pressure gradient control strategies, including CAV control, PID control and active-disturbance-rejection-control. We build the system's model and make simulations based on Matlab/Simulink software platform. Results show that active-disturbance-rejection-control algorithm has good capabilities for shorter responding time and lower overshot of the pressure gradient. The results reveal that active-disturbance-rejection-control method has good control performances in responding time, accuracy and disturbance rejection.

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Energy efficient design and control of cleanroom environment control systems in subtropical regions – A comparative analysis and on-site validation

Cited by 33 publications

References 19 publications

Evaluación de la Climatización en Locales Comerciales, Integrando Técnicas de Termografía, Simulación y Modelado por Elementos Finitos

Evaluación de la Climatización en Locales Comerciales, Integrando Técnicas de Termografía, Simulación y Modelado por Elementos Finitos

Energy-Optimal Structures of HVAC System for Cleanrooms as a Function of Key Constant Parameters and External Climate

Pressure Gradient Control Strategies Based on Disturbance Rejection for Typical Pharmaceutical Cleanrooms

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