Application of the Self-Adjusting Fuzzy Control in Water System of Central Air-Conditioner for Saving Energy

Central air conditioning system with multi variable, nonlinear, time-varying, large time-delay characteristics using the traditional control strategy is difficult to control and good energy saving effect. For these features of central air conditioning system, self-adjustment fuzzy controller is studied based on the fuzzy controller. The simulation can be seen, the self-adjustment fuzzy controller has a faster response speed and smaller steady-state error, while there is a certain adaptive capacity. Its control performance is superior to conventional control strategies and conventional fuzzy controller. Central air-conditioning system uses the parameter self-adjusting fuzzy controller strategy combined with inverter technology. According to load changes, central air conditioning water system can automatically real-timely control the pumps to ensure that the comfort of central air-conditioning provided a significant reduction in energy consumption.

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Development and Application of the Control Technology for VAV Air-Conditioning System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.374-377.543 ◽

2011 ◽

Vol 374-377 ◽

pp. 543-546

Author(s):

Shi Zhong Yang ◽

Qing Chang Ren ◽

Xia Li

Keyword(s):

Air Conditioning ◽

Large Scale ◽

Control Strategies ◽

Hot Spot ◽

Time Lag ◽

Water System ◽

Developed Countries ◽

Research Progress ◽

Air Conditioning System ◽

Saving Effect

The variable air volume (VAV) air-conditioning system with its superior energy saving effect has been applied in many developed countries, also drawn more and more attention in China. Due to the characteristics of VAV air-conditioning system are nonlinear, large time lag, strong coupling, multi-variable and multi-disturbance, the control complexity of the VAV system increase greatly. The energy conservation and comfort of the VAV air-conditioning system can not fully been embodied in application. The research on the VAV system has become the hot spot in the science and technology workers, many new methods and strategies have emerged. From the three aspects: the air system, the water system and the large scale system, the paper describes the control strategies, the control methods and the research progress about the VAV air-conditioning system.

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Modeling and Simulation of Chilled Water System for Central Air Conditioning

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.204-208.4280 ◽

2012 ◽

Vol 204-208 ◽

pp. 4280-4285 ◽

Cited By ~ 1

Author(s):

Jian Min Sun ◽

Chun Dong Zhang ◽

Ze Yang Zhou

Keyword(s):

Control System ◽

Energy Saving ◽

Pid Control ◽

Air Conditioning ◽

Water System ◽

Air Conditioning System ◽

Chilled Water ◽

Central Air Conditioning ◽

Chilled Water System ◽

Saving Effect

Considering the central air conditioning system is highly susceptible to interferences from external environment, this paper established a dynamic mathematical model for chilled water system with the air conditioning area, fan coil unit and air conditioning area interference factors. Selection of chilled water system as a controlled object, designed the energy saving control system for central air-conditioning. The inputs of PID controller are deviation of actual temperature and setting temperature, and the change rate of the deviation; output is operation frequency of pump. Experiment shows that, PID control system in 90% time operating at a frequency of 10Hz-40Hz, average is 32.5Hz. Compared with no control system, the pump power consumption was reduced 33.9%.In conclusion, PID control in the central air conditioning system have a good energy saving effect.

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Air Conditioning System Water Quality and Equipment Condition Investigation and Analysis of Energy Saving Measures

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.516-517.1224 ◽

2012 ◽

Vol 516-517 ◽

pp. 1224-1228

Author(s):

Na Liang ◽

Rui Li

Keyword(s):

Energy Saving ◽

Air Conditioning ◽

Water System ◽

Building Energy ◽

Development Trend ◽

Air Conditioning System ◽

Effective Utilization ◽

Energy Saving Potential ◽

Central Air Conditioning ◽

Points Of View

Due to energy reserves reduces gradually and uneven distribution, all countries pay more and more attention to energy saving and improve the effective utilization of energy, China also attaches great important to this. Energy saving of buildings is a necessary development trend. Air conditioning system as a large important part of building energy consumption has a huge energy-saving potential. This article mainly introduced the related strategies of energy saving in central air conditioning water system from the following three points of view: the water treatment, the cooling tower, and the variable frequency pump.

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Energy-Saving Monitoring System of Central Air-Conditioning Based on Dynamic Load

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1039.409 ◽

2014 ◽

Vol 1039 ◽

pp. 409-414

Author(s):

Tao Han ◽

Xue Feng Lai ◽

Liang Wen Yan ◽

Zai Feng Zhang

Keyword(s):

Energy Saving ◽

Monitoring System ◽

Dynamic Load ◽

Pid Control ◽

Air Conditioning ◽

Water System ◽

Air Conditioning System ◽

Advantages And Disadvantages ◽

Hardware System ◽

Central Air Conditioning

This paper introduces the components of central air-conditioning system and compares the advantages and disadvantages of the PID control and fuzzy control.Fuzzy control theory and inverter technology are combined to design the Energy-Saving Monitoring System based on the fuzzy control box of STM32F103C8T6,Siemens S7-200 PLC, ABB inverter as the hardware system and interfaces configuration of KingView as the software. Experimental results show that the water system can be variable flow controlled based on the dynamic load, central air-conditioning energy efficiency the COP has greatly improved under the premise of ensuring the comfort of central air-conditioning.

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Application Analysis of Chilled Water Storage Technology in the Transformation of Central Air Conditioning System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.608-609.1097 ◽

2012 ◽

Vol 608-609 ◽

pp. 1097-1105

Author(s):

Kai Jing Liu ◽

Qun Li Zhang ◽

De Ying Li

Keyword(s):

Air Conditioning ◽

Water Storage ◽

Cost Comparison ◽

Air Conditioning System ◽

Storage Technology ◽

Application Analysis ◽

Chilled Water ◽

Central Air Conditioning ◽

Saving Effect ◽

Operation Cost

This article introduces the specific application of central air conditioning chilled water storage technology in the actual central air conditioning engineered reconstruction. The author analyzes the energy-saving effect of application of central air conditioning chilled water storage technology and the economy of central conditioning renovation project. Operation cost comparison shows that water storage air conditioning system saves money more above 35% than conventional air conditioning system.

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Implementation of Air-conditioning Control Technology Based on Wireless Sensor

International Journal of Online Engineering (iJOE) ◽

10.3991/ijoe.v13i07.7287 ◽

2017 ◽

Vol 13 (07) ◽

pp. 91

Author(s):

Yecong He ◽

Min Tan

Keyword(s):

Monitoring System ◽

Air Conditioning ◽

Cooling Capacity ◽

Wireless Sensor ◽

Processing Unit ◽

Air Conditioner ◽

Font Size ◽

Air Conditioning System ◽

Central Processing ◽

Central Air Conditioning

Using wireless sensor networks to collect indoor temperature and humidity data, a monitoring system is built.According to the data of the central processing unit, the state of the current room is analyzed, and the cooling capacity (heat) and air volume of the central air conditioner are calculated. Meanwhile, this system calculates the relevant fees based on the amount of cold (heat) consumed by each user, and provides a more accurate data base for the central air conditioning system for energy efficiency optimization. Theresults show that this system can accurately reflect the environmental status of the target room.Therefore, it is concluded that the indoor environment monitoring system based on wireless sensor network and embedded technology proposed in this paper is effective and feasible.

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Research on energy saving control of chilled water system of central air conditioning system

2016 Chinese Control and Decision Conference (CCDC) ◽

10.1109/ccdc.2016.7531472 ◽

2016 ◽

Author(s):

Li Zhuang Ju ◽

Lv Cai ◽

Mei Jie

Keyword(s):

Energy Saving ◽

Air Conditioning ◽

Water System ◽

Air Conditioning System ◽

Chilled Water ◽

Central Air Conditioning ◽

Chilled Water System ◽

Energy Saving Control

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A Central Air Conditioning System Design for Hotel in Guangzhou

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.860-863.1612 ◽

2013 ◽

Vol 860-863 ◽

pp. 1612-1615

Author(s):

Zhou Wu ◽

Fang Yang ◽

Hui Fang Tian ◽

Jing Jing Wang

Keyword(s):

Air Conditioning ◽

Water System ◽

Air Conditioning System ◽

Conference Room ◽

Guangzhou City ◽

Air System ◽

Central Air Conditioning ◽

Smoke Prevention ◽

Large Conference

The primary mission of this design is the air conditioning design of a hotel in Guangzhou city. The calculation of cooling load & heat load, division of the air conditioning system and the determination of the scheme, the design of the duct and water system, and the design of the smoke prevention and extraction system are all included. According to the related standard and considering the energy saving and comfort requirements, the air conditioning system are determined through the economic and technological comparison. Primary return air system is used for open office area and dining hall; fan-coil units with fresh air system is adopted for the guest rooms of the hotel; and the VRV system is adopted for the large conference room. The new air in restaurant rooms and the large conference room is handled by full-heat type fresh air exchanger; new air in guest room is handled by air conditioning units.

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The Design of a Central Air Conditioning System for a Rebuilt Commercial Building

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.84-85.743 ◽

2011 ◽

Vol 84-85 ◽

pp. 743-746

Author(s):

You Yuan Zhou

Keyword(s):

Air Conditioning ◽

Low Cost ◽

Water System ◽

Department Store ◽

Commercial Building ◽

Air Conditioning System ◽

Operational Result ◽

Central Air Conditioning ◽

System Water ◽

System Layout

An example of a central air-conditioning project of a rebuilt department store is described in this paper. The design of air system, water system, layout and operations for the air conditioning system is presented in this paper. The system is different form ordinary ones because the floor height is lower; so many special considerations must be taken during the design. In addition, the low cost and easy maintenance place an important role in the design. The operational result of the design is promising and it can be referenced by other designers.

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A Central Air Conditioning System Design for Guesthouse in Changsha City

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.170-173.2431 ◽

2012 ◽

Vol 170-173 ◽

pp. 2431-2436

Author(s):

Yun Fan Zeng ◽

Min Hui Zhang

Keyword(s):

Air Conditioning ◽

Ventilation System ◽

Water System ◽

Exhaust System ◽

Air Conditioning System ◽

Cold Source ◽

Electric Boiler ◽

Central Air Conditioning ◽

Reliability Of Operation ◽

Process Energy

This article presents the design of the air conditioning system in the building. In the project, ice storage for cold source and electric boiler thermal storage for heat source are taken while variable primary flow is used for water system. Taking into account the functions of each part, all air and fan coil unit with fresh air system are applied in ventilation system. The design of air exhaust system is introduced. A detail scheme about the annual operational regulation for energy saving is proposed. During the designing process, energy conservation is given enough attention, and the reliability of operation is also ensured.

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