Numerical Investigation on Ventilation Control Strategy of Reducing Circulating Air Volume in a Factory for Storing Satellites

2021 ◽  
pp. 111444
Author(s):  
Jiaan Zhao ◽  
Yuan Liu ◽  
Xianting Li ◽  
Wei Xu ◽  
Huan Wang
Keyword(s):  
Numerical Investigation ◽  
Control Strategy ◽  
Ventilation Control ◽  
Air Volume

scholarly journals Optimal Control Strategy for Variable Air Volume Air-Conditioning Systems Using Genetic Algorithms

2019 ◽  
Vol 11 (18) ◽  
pp. 5122 ◽  
Author(s):  
Nam-Chul Seong ◽  
Jee-Heon Kim ◽  
Wonchang Choi
Keyword(s):  
Optimal Control ◽  
Genetic Algorithms ◽  
Control Strategy ◽  
Air Conditioning ◽  
Static Pressure ◽  
Hvac System ◽  
Total Energy Consumption ◽  
Optimal Control Strategy ◽  
Variable Air Volume ◽  
Air Volume

This study is aimed at developing a real-time optimal control strategy for variable air volume (VAV) air-conditioning in a heating, ventilation, and air-conditioning (HVAC) system using genetic algorithms and a simulated large-scale office building. The two selected control variables are the settings for the supply air temperature and the duct static pressure to provide optimal control for the VAV air-conditioning system. Genetic algorithms were employed to calculate the optimal control settings for each control variable. The proposed optimal control conditions were evaluated according to the total energy consumption of the HVAC system based on its component parts (fan, chiller, and cold-water pump). The results confirm that the supply air temperature and duct static pressure change according to the cooling load of the simulated building. Using the proposed optimal control variables, the total energy consumption of the building was reduced up to 5.72% compared to under ‘normal’ settings and conditions.

Numerical investigation of T-Foil hybrid control strategy for ship motion reduction in head seas

2020 ◽  
Vol 217 ◽  
pp. 107924
Author(s):  
Yichen Jiang ◽  
Junyu Bai ◽  
Yuan Sun ◽  
Yifang Sun ◽  
Zhi Zong
Keyword(s):  
Numerical Investigation ◽  
Control Strategy ◽  
Hybrid Control ◽  
Ship Motion

scholarly journals Ventilation Control Strategy Using the Supply CO2 Concentration Setpoint

2005 ◽  
Vol 11 (2) ◽  
pp. 239-262 ◽  
Author(s):  
Nabil Nassif ◽  
Stanislaw Kajl ◽  
Robert Sabourin
Keyword(s):  
Control Strategy ◽  
Co2 Concentration ◽  
Ventilation Control

Numerical Investigation Based on Orthogonal Design of Structural Parameters on Large-Diameter DTH Hammer Bit

2013 ◽  
Vol 774-776 ◽  
pp. 1442-1445
Author(s):  
Zhi Qiang Zhao ◽  
Li Jia Li ◽  
Kun Bo ◽  
Xu Sheng He ◽  
Jun Feng Chai
Keyword(s):  
Numerical Investigation ◽  
Design Method ◽  
Orthogonal Design ◽  
Structural Parameters ◽  
Large Diameter ◽  
Technical Problem ◽  
Theory Analysis ◽  
Air Volume ◽  
Orthogonal Design Method ◽  
Reverse Circulation

To achieve cutting transport with air reverse circulation in dry and shallow large-diameter holes of rock-socketed pile, and to solve the technical problem with airlift and pump reverse circulation, a large-diameter reverse circulation bit innovatively designed based on ejecting. Meanwhile, the orthogonal design method applied to explore the application feasibility of ejector theory in use of in air reverse circulation drilling. Through theory analysis, three key geometry parameters of air reverse circulation bit have proved to have direct affect on the function of cutting transport, including the diameter of nozzles (Dn), the number of nozzles (N), the angle of inclination (θs). The results have shown that reverse circulation effect of large-diameter bit designed based on ejecting is valid and stable. Further while the air volume of GQF-16 hammer bit goes to 90m3/min, a configuration of parameters with Dn=20mm, N=3, θs=35°are the most ideal parameter combinations.

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