The Research Of Solarwall Temperature Acquisition And Control System

The solar wall system, a new type of solar energy based heating and ventilationsystem, which can effectively solve the problem of indoor ventilation and air pre-heating, it reduces building energy consumption, while improving indoor air quality.Now, however, researches of solar wall technology concentrates on how the bodystructure, like hole-punching, board shape, surface coating and external environmentalfactors like light intensity, wind velocity together affect the thermal performance. Thispaper aims at doing researches on solar wall system to determine control strategy, notonly to satisfy the user’s personal needs, but also improve the energy conversionefficiency of the solar wall system to a certain extent.A set of8/16-channel temperature digital acquisition system has been developed inthis paper, based on Maxim’s recently released chip for thermal management, Accordingto the modular design concept, such functional modules as time-sharing sampling, SPIbus simulation, instruction sending and receiving, serial communication, LCD arecompleted for MCU in detail, and before making PCB, we completed the programdebugging using the Proteus software and put forward a plan for sampling channelexpansion. This acquisition system has advantages of high precision, low cost, of stronganti-interference ability.The host computer software developed by vb6.0provides the following functions:data storage, dynamic curve drawing, temperature field monitoring, mathematicalstatistics, control signal output and so on.This paper established the control models of the whole solar wall system, based onwhich, both conventional PID control and Adaptive Fuzzy-PID control are respectivelyadded to the system. Simulation and parameters setting of PID control with adaptiveFuzzy-PID control are finished in Simulink software, meanwhile, we contrast therobustness of the adaptive Fuzzy-PID and conventional PID, considering the systemfeatures of time-varying parameters and response delay.Calibration experiments of the temperature acquisition system are made in detail atthe end of the paper, results show that the accuracy meets the requirements, we choseand arranged the solar wall board, laid out the thermocouple measuring points, finishedthe temperature monitoring experiment. laying a basis for the whole system’s furtherstudy on temperature control.