Intelligent Control Technology for Frequency Conversion Pump in Air Conditioning Systems

2013 ◽  
pp. 665-669
Author(s):  
Shizhong Yang ◽  
Qingchang Ren
Keyword(s):  
Intelligent Control ◽  
Air Conditioning ◽  
Frequency Conversion ◽  
Control Technology ◽  
Air Conditioning Systems

Energy Saving Control System for Central Air-Conditioning Based on Terminal Temperature Measuring and Frequency Conversion Control Technology

2011 ◽  
Vol 201-203 ◽  
pp. 2144-2153
Author(s):  
Hong Yu Zhou ◽  
Xiao Jian Chen ◽  
Zi Hu Chen ◽  
Ming Wei Tong
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Air Conditioning ◽  
Frequency Conversion ◽  
High Energy ◽  
Control Technology ◽  
Water Pump ◽  
Temperature Measuring ◽  
Central Air Conditioning ◽  
Energy Saving Control

In view of the insufficiency of central air-conditioning system that FCU, water pumps and air blower’s movement connot match with the actual operating load when varying duty, an energy saving control system for central air-conditioning based on terminal temperature measuring and frequency conversion control technology is proposed. This system can real-time measure different floors’ and nods’ temperatures in the building, and export orders to control the frequency of FCU, chilled water pump, cooling water pump and cooling tower air blower. To overcome big delay, large inertia and variable condition of control object, the dnamic fzzy nural network algorithm(DFNN), is applied into the control system. According to the practical running situations, the energy saving control system has advantages as high energy saving rate, high stability, good maintainability, which may be promoted the application vigorously.

The Study of Simulation on Variable-Frequency Air Conditioning Systems Adopted by Control Strategy of Hybrid Automata

2014 ◽  
Vol 945-949 ◽  
pp. 2629-2632
Author(s):  
Ze Qin Liu ◽  
Zhen Jing Wu
Keyword(s):  
Control Strategy ◽  
Pid Control ◽  
Air Conditioning ◽  
Frequency Conversion ◽  
Control Model ◽  
Variable Frequency ◽  
Hybrid Automata ◽  
Hybrid Features ◽  
Air Conditioning Systems ◽  
Frequency State

This paper setup the hybrid automata control model of variable-frequency air conditioning by adopting Stateflow simulation toolbox of Matlab. The regulated quickness of the hybrid automata control model was simulated and validated by comparing PID control in Simulink. The hybrid automata control strategy was proposed in this paper for exploring hybrid features of the frequency conversion air conditioning control system. Comparing the traditional PID model, the result indicated the convergence speed of hybrid automata control strategy was faster to control the compressor operating frequency, better to simulate indoor energy balance, and to control the operation frequency state of the compressor. The paper showed the control strategy of hybrid automata control could achieve temperature control better, and the studied model has the better effects.

Design of Air-Conditioning System and Elevator System Based on Intelligent Control

2014 ◽  
Vol 687-691 ◽  
pp. 26-28
Author(s):  
Hong Kun Pan
Keyword(s):  
Energy Consumption ◽  
Intelligent Control ◽  
Air Conditioning ◽  
Building Energy ◽  
Control Technology ◽  
Transport Capacity ◽  
Air Conditioning System ◽  
High Rise ◽  
Elevator Group Control ◽  
Conditioning Control

Air-conditioning system is the importance facilities to provide people with the comfort service, and air conditioning energy consumption accounts for about 40% of the total building energy consumption. However, the elevator system is an important transport vertical transport of high-rise buildings. Therefore, this article combines intelligent control technology with traditional air-conditioning control technology and elevator group control technology to solve the existing problem of air-conditioning control system, and greatly improve the transport capacity of the elevator system. Under the precondition of ensuring environmental comfort and improving systems, reduce the energy consumption of the system obviously.

ANALYSIS OF COMPETING VARIANTS OF AIR CONDITIONING SYSTEMS WITHOUT AIR EXTRACTION FROM ENGINES AT THE STAGE OF PASSENGER AIRCRAFT ONBOARD SYSTEMS CONCEPTUAL DESIGN

2019 ◽  
Vol 6 (3) ◽  
pp. 80-85
Author(s):  
Denis Igorevich Smagin ◽  
Konstantin Igorevich Starostin ◽  
Roman Sergeevich Savelyev ◽  
Anatoly Anatolyevich Satin ◽  
Anastasiya Romanovna Neveshkina ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Air Conditioning ◽  
Research University ◽  
Cooling System ◽  
Fuel Efficiency ◽  
Air Cooling ◽  
Moscow Aviation Institute ◽  
Air Conditioning System ◽  
Low Efficiency ◽  
Air Conditioning Systems

One of the ways to achieve safety and comfort is to improve on-board air conditioning systems.The use of air cooling machine determines the air pressure high level at the point of selection from the aircraft engine compressor. Because of the aircraft operation in different modes and especially in the modes of small gas engines, deliberately high stages of selection have to be used for ensuring proper operation of the refrigeration machine in the modes of the aircraft small gas engines. Into force of this, most modes of aircraft operation have to throttle the pressure of the selected stage of selection, which, together with the low efficiency of the air cycle cooling system, makes the currently used air conditioning systems energy inefficient.A key feature of the architecture without air extraction from the main engines compressors is the use of electric drive compressors as a source of compressed air.A comparative analysis of competing variants of on-board air conditioning system without air extraction from engines for longrange aircraft projects was performed at the Moscow Aviation Institute (National Research University).The article deals with the main approaches to the decision-making process on the appearance of a promising aircraft on-board air conditioning system at the stage of its conceptual design and formulated the basic requirements for the structure of a complex criterion at different life cycle stages.The level of technical and technological risk, together with a larger installation weight, will require significant costs for development, testing, debugging and subsequent implementation, but at the same time on-board air conditioning system scheme without air extraction from the engines will achieve a significant increase in fuel efficiency at the level of the entire aircraft.

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