Recent Patents on OPC for Central Air-Conditioning System

2014 ◽  
Vol 8 (1) ◽  
pp. 234-239
Author(s):  
Jiejia Li ◽  
Peng Yang ◽  
Xiaoyan Han ◽  
Pengcheng Guo
Keyword(s):  
Air Conditioning ◽  
Integrated Management ◽  
Rapid Development ◽  
Data Communications ◽  
Air Conditioning System ◽  
Opc Server ◽  
Opc Client ◽  
Opc Technology ◽  
Central Air Conditioning ◽  
And Control

To achieve the centralized monitoring and integrated management of the central air-conditioning system, taking the characteristics of data communications and control complexity in the air-conditioning system into consideration, and combined with the OPC (OLE(Object Linking and Embedding) for Process Control) technology, an intelligent central airconditioning supervisory system is developed and designed. In this paper, after searching the OPC technology standard, the overall structure diagram of the monitoring system is designed, and the OPC server program is also developed by using Knight OPC Server Rapid Development Toolkits. The OPC client application program and man-machine interface are exploited by KingView configuration software. The monitor and control system whose interface is opened is designed for the central air-conditioning. In the end, the experiment result proves that the system operation has good performance for temperature-controller and humidity-controller clustered controlling as well as data communications, thus, satisfying the requirements.

scholarly journals Application of soft sensor technology in HVAC system test

2021 ◽  
Vol 261 ◽  
pp. 01013
Author(s):  
Changbao Guo
Keyword(s):  
Air Conditioning ◽  
Rapid Development ◽  
Sensor Technology ◽  
Measurement Technology ◽  
Hvac System ◽  
Air Conditioning System ◽  
Test Parameters ◽  
Soft Measurement ◽  
And Control ◽  
Measurement And Control

With the rapid development of modern society, the measurement and control requirements of key variables of air conditioning test technology are also increasing. When the parameters of HVAC system are measured and controlled, there are a large number of sensors and instruments used. When sensor failure or measurement error distortion occurs, the air conditioning system cannot operate normally and automatically. At the same time, some variables in the test parameters cannot be directly collected by the sensor. In order to solve these problems, researchers have focused on soft measurement technology in recent years, which provides a good breakthrough for the measurement and control of air conditioning system test parameters. This paper expounds the application of soft measurement technology in HVAC system.

The Central Air-Conditioning Energy-Saving Control Technology

2011 ◽  
Vol 250-253 ◽  
pp. 2695-2699 ◽  
Author(s):  
De Bao Lei ◽  
Zhong Hua Tang ◽  
Kai Zhao
Keyword(s):  
Energy Saving ◽  
Air Conditioning ◽  
Control Variable ◽  
State Parameter ◽  
System Control ◽  
Air Conditioning System ◽  
Variable Air Volume ◽  
Central Air Conditioning ◽  
Energy Saving Control ◽  
And Control

With the application of the central air conditioning system widely, it has increased fast the consumption of national energy. This paper analyzes how to control a central air-conditioning system for energy saving, mainly including control characteristics , automatic control component and the control approaches of energy saving. Energy-saving approaches consist of indoor state parameter selection control, variable-speed pump control，variable air volume system control, Storage cold control and control Optimization.

Application of the OPC Technology in the No-Load Test Platform of the Metro Bogie

2014 ◽  
Vol 945-949 ◽  
pp. 2062-2066
Author(s):  
Guang Sheng Ren ◽  
Lei Gai ◽  
Xiao Qing Yin
Keyword(s):  
Load Test ◽  
Industrial Control ◽  
Opc Server ◽  
Computer Measurement ◽  
Test Platform ◽  
Opc Client ◽  
Opc Technology ◽  
Upper Computer ◽  
And Control ◽  
Measurement And Control

The generation of the OPC technology makes each data source communicate flexibly in the industrial control environment. This paper takes the no-load test platform of the metro bogie as an example to design a lower and upper computer measurement and control system which is consist of IPC and PLC by the OPC technology. The OPC client is developed based on the platform of Visual Basic. By using the different communication mode, it is realized to access the OPC server data.

Application Study of Load Forecasting of Central Air-Conditioning System Based on Time Sequence Analysis Method

2012 ◽  
Vol 220-223 ◽  
pp. 622-625
Author(s):  
Xue Li Zhu ◽  
Bo Dong ◽  
Yong Jun Zhu
Keyword(s):  
Sequence Analysis ◽  
Air Conditioning ◽  
Time Lag ◽  
Load Forecasting ◽  
Time Sequence ◽  
Analysis Method ◽  
Air Conditioning System ◽  
Central Air Conditioning ◽  
Heating Load ◽  
Time Sequence Analysis

With the characteristics of non-stationarity, non-linearity, time-lag of refrigeration/ heating supplying in minds, load forecasting of central air-conditioning system is carried using time sequence analysis method. Firstly, acquisition sample data of central air-conditioning system is pretreated, and random time sequence AR model of system is formulated. Then, forecasting of AR refrigeration/heating load based on Yule-walker method is conducted. In order to enhance forecasting accuracy, crossover forecasting is introduced into the load forecasting, that is, to use vertical forecasting to follow household demands for load and horizontal forecasting to track changes of weather. Then, weight cross is made to vertical and horizontal forecasting results. Finally, refrigeration/heating load forecasting software of central air-conditioning system is developed, which is used in energy-saving monitoring and control of central air-conditioning system.

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