Study On The Load Of Building Integrated Solar Energy

With the wide utilization of traditional fossil fuel, industry technology hasdeveloped quickly and abundantly, accompanying with the increasingly severeenergy and environment crisises. Promotion of solar energy use is one of the mosteffective methods to overcome these difficulties. However, there are manyapplication problems existed in the technology of building integrated solar energy(BISE), such as the discordance on the outlook and dismatching on the load.This study focused on the load of BISE and includes three main parts. Firstly,the operating effect of a passive solar house (PSH) was monitored and the relatingmodel was structured in TRNSYS. Secondly, after experiment verification of themodel, the PSH structure parameters were optimized according to the indexes ofbuilding load and thermal comfort. In the end, control strateges of the active solarenergy systems and the corresponding results were studied.In the optimization study of building load, structure parameters included thebuilding orientation, wall material, area ratio of window to wall and the shape factor.Single factor researches and orthogonal test were carried out respectively with thetarget of indoor thermal comfort and the heating and cooling load. By the varianceanalysis, the influencing significance of different factors can be obtained. The resultswere supposed to instruct the passive design.In the study of the control strategies on the load of BISE, the load characters ofdomestic hot water, heating and the electric power were stated. Then different activesolar systems were designed and reasonable control methods were chosen inTRNSYS. These systems mainly included the domestic hot water systems and solarheating systems. The controlling effect and operating results were simulated, and thecorrespongding analysis and evaluation were carried out.The studied results show that, the required heating and cooling load of the PSHwould be cut down in a large scale and the thermal comfort can be improved whenthose four different structure parameters are optimized in the design stage. Theresults of variance analysis show that, the area ratio of window to wall and thebuilding orientation are the two most significant factors, no matter considered fromthe required building load or from the thermal comfort. The hourly simulations of different active solar systems show that, the temperature difference control on thesolar collector is an effective method to realize the match of collected solar energyand the required building load, namely the load of BISE.