Research And Implementation Of Solar Thermal Utilization Information System

With the change of global climate and the large consumption of fossil fuels andpetroleum resources, renewable energy utilization and exploitation has been paid greatattention by more and more countries in the world. It is urgent to effectively control thegreenhouse gas emissions and reasonable energy consumption, improve the efficiencyof energy utilization, and accelerate the research and application of the low-carbontechnology. The exploitation and utilization of solar energy, which is a kind of cleanand renewable energy, has an important meaning for the health and sustainabledevelopment of the economy. Lingang New City is one of the eight low-carbon practicepilot areas in shanghai, and Shanghai Ocean University is the low-carbon campuspractice pilot in Lingang. Energy saving and emission reduction are important contentof constructing saving-oriented campus and important measure to implementlow-carbon life concept. It can provide references on the data and means for low-carboncampus construction by applying information technology to analysis the situation andcharacteristics of energy utilization, existing problems and so on.Solar energy utilization is influenced by season, climate, alternation of day andnight, latitude, altitude and other factors, so the system design requires a high level onreasonable design, stable operation and effective energy saving. In this paper, aiming atstate monitoring and control of the solar energy utilization system, sensor technology,wireless communication technology and intelligent control technology were used toachieve data collection, transmission and control. And in the data center, a three-layerhybrid architecture, which consisted of expression layer, business layer and data layer,was adopted to solve the problems of data storage, management and results display. Onthe aspect of thermal performance analysis for solar water heating system, a mathematicmodel to calculate the minimum backup of the system was derived from the basictheories of solar thermal utilization. Finally, based on GIS, the methods to design themonitoring platform software of the system were given. In this paper, the technology of internet of things was applied to realize dataacquisition, communication and monitoring of the system. Firstly, sensors wereinstalled in the solar water heating system, such as solar irradiation sensor, watertemperature sensor, water level sensor, gas flow sensor, environmental temperaturesensor, and so on. According to the requirements of the sensors, different sensors werechosen different ways to connected with the data acquisition device, and then thecollected data was sent to the remote monitoring center with the help of the mobilecommunication network and wireless microwave transmission network. After dataanalysis, the processing results were feedback to the control subsystem. If the warningcondition is touched off, the system will automatically send an alarm message to user.Through the above experimental methods, the running state monitoring and earlywarning of the system and the automatic control of system parameters, such as waterlevel, water temperature and tilt angle of collector, were realized.This paper presents a mathematic model, which is derived from the basic theoriesof solar thermal utilization, to calculate the minimum backup of the solar water heatingsystem. Time factor effects solar declination and solar irradiation on the tilt surface.Environmental temperature and inlet water temperature are the influence factors of theefficiency of solar collector and maximum gained heat of the system. The systemthermal load, such as water level, water temperature and so on, is the determinant offactually gained heat. Through the analysis of the mathematical relationship betweenauxiliary energy consumption and system operating parameters, a minimum backupcalculation model of the solar system is established. Thanks to the mathematical model,the running parameters can be adjusted accordingly by control subsystem to increase theutilization of solar energy resources and reduce the auxiliary energy consumption, sothe purpose of energy saving and emission reduction can be achieved.In this paper, a mixed programming technology was applied to realize themonitoring platform software of the system which based on GIS. The system wasdivided into management information subsystem, geographic information subsystemand aided decision subsystem, corresponding to relational database management, vectormap operation and data analysis processing. Then, variety of application software, suchas ArcGIS, MATLAB, VC++, SQL Server, was taken advantages of to design thedatabase, function modules and graphical user interface. Finally, the coupling of GIS and MIS, data storage and management, mathematical model computation and resultdisplay were realized.In conclusion, internet of things was used to implement the solar thermal utilizationinformation system. A mathematical model of minimal backup thermal was put forward,and the method to design of the monitoring platform software based on GIS was givenout.