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Design and Implementation of Remote Monitoring System for Energy Conserevation of Office-Building Central Air Conditioning

Author: LiaoZhongWen
Tutor: WenShengPing
School: South China University of Technology
Course: Mechanical Design and Theory
Keywords: Central air-conditioning Energy conservation Remote monitoring LPMV model Comfortable temperature control
CLC: TP277
Type: Master's thesis
Year: 2011
Downloads: 112
Quote: 0
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Abstract


With the rapid development of social economy and urban scale continuous enlargement, air-conditioning energy saving is more and more attention by people. But current the energy saving system of air conditioning exists many problems, waste is serious.Our office buildings in energy saving of air conditioning has many problems,there are: not considering human thermal comfort, air conditioning temperature setting cannot with outdoor temperature&indoor temperature and humidity change’s change; Office building automation level is low; not focused on the terminal equipment control.In view of the above question, the author considers the PMV model’s and adaptive model’s advantages of thermal comfort theory,then proposes an improved comfort theory,puts forward a new LPMV model, and explore to establish a practical LPMV equation, analysis the seven factors that influence the equation,determine the thermal comfort range that consideration the outdoor temperature variation.Based on the improved LPMV model, this paper development a central air-conditioning energy saving system that has remote monitoring function.This system including hardware and software systems.First designed a terminal intelligent control device that based on LonWorks and power line carrier-current communication technology. i.LON server access the Internet, form air terminal equipment monitoring network, then realized the fan coil distance centralized monitoring,and provides hardware conditions to realized room comfortable temperature control.Then by using the vb.net programming language and SQL Server 2005 database technology, and according to the requirements of central air-conditioning remote monitoring and room comfortable temperature control, design the needs of system software, designed three function modules.(1) The control module that based on comfortable temperature.Designed a PC software interface.According to different function office room has different activity type & comfortable level & room basic parameters and also,this is the main basis to control room comfortable temperature.Use programming methods then according to room parameters and environmental parameters quantitative calculation LPMV value.Use LPMV value to evaluation the room’s comfortable,then make the control strategy to control the fan-coil change state,realize the room’s cold quantity reach a right level and the room temperature in a comfortable level.(2) The database that designed based on comfortable temperature. According to the control needs of room comfortable temperature, designed the database table and relational database structure that system software need’s.(3) Other auxiliary function module.Designed data processing module that can processing the i.LON server’s data,and then give the room comfortable temperature control module and real-time monitoring interface correct data.Designed the real-time monitoring interface that can remote set room parameters and remote control fan-coil’s state.Above these work is hope to realize the central air-conditioning has automation & humanized and utmost energy-saving.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Monitoring, alarm,fault diagnosis system
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