Coordinated control for Air Handling Unit and Variable Air Volume boxes in multi-zone HVAC system

2021 ◽  
Vol 107 ◽  
pp. 17-26
Author(s):  
Shunjian Ma ◽  
Yuanyuan Zou ◽  
Shaoyuan Li
Keyword(s):  
Coordinated Control ◽  
Hvac System ◽  
Variable Air Volume ◽  
Air Handling Unit ◽  
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.

scholarly journals Synergetic Control for HVAC System Control and VAV Box Fault Compensation

2019 ◽  
Vol 29 (3) ◽  
pp. 555-570
Author(s):  
Radhia Ettouil ◽  
Karim Chabir ◽  
Dominique Sauter ◽  
Mohamed Naceur Abdelkrim
Keyword(s):  
System Control ◽  
Hvac System ◽  
Reconfigurable Control ◽  
External Disturbances ◽  
Variable Air Volume ◽  
Air Volume ◽  
Fault Compensation ◽  
Synergetic Control ◽  
Nominal Performance ◽  
The Stability

Abstract Synergetic control is proposed for heating, ventilating and air-conditioning (HVAC) system control. The synergetic controller is developed using the nonlinear model of the HVAC system. Occupancy information in each zone is required in the design of the controller which offers inherent comfort according to the occupancy in the zone. The stability of the building system using the proposed control is verified through the Lyapunov approach. It is also proved that the synergetic controller is robust to external disturbances. Then, synergetic theories are used to design a reconfigurable control for damper stuck failures in variable air volume (VAV) to recover the nominal performance. Simulations are provided to validate the effectiveness of the proposed controller for a three-zone building.

scholarly journals Energy performance analysis of Region of Peel Headquarters Building as a sustainable building using the "Carrier HAP", "eQUEST" simulation program and "RETScreen" cost analysis program

2021 ◽  
Author(s):  
Afzal Siraj Siddique
Keyword(s):  
Heat Pump ◽  
Energy Efficient ◽  
Water Source ◽  
Building Energy ◽  
Open Loop ◽  
Base Case ◽  
Hvac System ◽  
Variable Air Volume ◽  
Air Volume ◽  
Energy Efficient Building

The principles of building energy simulation and its relationship with heating and cooling energy calculation help to make an integrated evaluation of building energy consumption. This is used to achieve a better and more energy efficient building. The sensitivity analysis of energy efficient HVAC design was used to create an energy efficient Peel Region Headquarters Building. An energy audit was conducted on the existing building to establish the Base Case Model "Peel Region Headquarters Building" to determine its annual energy consumption across all current usage. To reduce the total energy cost of the Base Case Model, different HVAC Systmes were investigated to analyze their energy-based performance and impact on the Greehouse Gas Emission (GHG). The sensitivity analysis was conducted using two whole building simulation programs, "Carrier HAP" and "eQUEST", with three different air systems, namely, "2-Fan Dual Duct Variable Air Volume System", "1-Fan Dual Duct Variable Air Volume System" and "1-Fan Dual Duct Variable Air Volume System with two Rooftop Packaged HVAC System'. Three different types of heat pumps, namely, Open Loop Water Source Heat Pump, Closed Loop Water Source Heat Pump, and Ground Source Heat Pump, were used to determine the efficiency and viability of the three proposed HVAC System with the existing infrastructure. RETScreen International Clean Energy Project Analysis Software (Version 4) was used to evaluate the energy production and savings, life-cycle costs, emission reductions and financial viability. MNECB/CBIP and ASHRAE 90.1 (2004) Building Compliance Program was used for determining the key elements for analyzing the building components and for providing recommendations for an energy efficient building. The improvement from the conventional HVAC System to implementation of an Open Loop Water Source Heat Pump resulted in 75% energy cost savings for the Peel Region Headquarters Building. The percentage contribution of CO₂ was reduced by 78%.

scholarly journals Results from simulation and laboratory testing of air handling unit and variable air volume box diagnostic tools

2003 ◽  
Author(s):  
Natascha S Castro ◽  
Jeffrey Schein ◽  
Cheol Park ◽  
Michael A Galler ◽  
Steven T Bushby
Keyword(s):  
Laboratory Testing ◽  
Diagnostic Tools ◽  
Variable Air Volume ◽  
Air Handling Unit ◽  
Air Volume

scholarly journals Energy performance analysis of Region of Peel Headquarters Building as a sustainable building using the "Carrier HAP", "eQUEST" simulation program and "RETScreen" cost analysis program

2021 ◽  
Author(s):  
Afzal Siraj Siddique
Keyword(s):  
Heat Pump ◽  
Energy Efficient ◽  
Water Source ◽  
Building Energy ◽  
Open Loop ◽  
Base Case ◽  
Hvac System ◽  
Variable Air Volume ◽  
Air Volume ◽  
Energy Efficient Building

The principles of building energy simulation and its relationship with heating and cooling energy calculation help to make an integrated evaluation of building energy consumption. This is used to achieve a better and more energy efficient building. The sensitivity analysis of energy efficient HVAC design was used to create an energy efficient Peel Region Headquarters Building. An energy audit was conducted on the existing building to establish the Base Case Model "Peel Region Headquarters Building" to determine its annual energy consumption across all current usage. To reduce the total energy cost of the Base Case Model, different HVAC Systmes were investigated to analyze their energy-based performance and impact on the Greehouse Gas Emission (GHG). The sensitivity analysis was conducted using two whole building simulation programs, "Carrier HAP" and "eQUEST", with three different air systems, namely, "2-Fan Dual Duct Variable Air Volume System", "1-Fan Dual Duct Variable Air Volume System" and "1-Fan Dual Duct Variable Air Volume System with two Rooftop Packaged HVAC System'. Three different types of heat pumps, namely, Open Loop Water Source Heat Pump, Closed Loop Water Source Heat Pump, and Ground Source Heat Pump, were used to determine the efficiency and viability of the three proposed HVAC System with the existing infrastructure. RETScreen International Clean Energy Project Analysis Software (Version 4) was used to evaluate the energy production and savings, life-cycle costs, emission reductions and financial viability. MNECB/CBIP and ASHRAE 90.1 (2004) Building Compliance Program was used for determining the key elements for analyzing the building components and for providing recommendations for an energy efficient building. The improvement from the conventional HVAC System to implementation of an Open Loop Water Source Heat Pump resulted in 75% energy cost savings for the Peel Region Headquarters Building. The percentage contribution of CO₂ was reduced by 78%.

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