为了改善中央空调现有的全局控制策略,采用一种分区模型的局部控制策略。以广东省某购物广场中央空调节能改造项目作为研究背景,分析了购物广场内部结构特点和功能区域构成。将建筑中功能相似区域进行分区,找出各区域冷负荷规律,并根据不同区域冷负荷特点建立数学模型,"因地制宜"地制定控制策略,充分挖掘节能潜力。采取新老系统对比运行的方法,利用组态软件分别对电能数据进行采集、记录、查询和分析,验证了分区模型控制策略的可行性及节能效果。

Lignite char is used to remove low concentration of NO in the flue gas under microwave irradiation and the effects of microwave power ,space velocity ,residence time and oxygen concentration on the denitration efficiency of lignite char are investigated .The results show that under microwave irradiation ,the higher the temperature of lignite char ,the better the denitration efficiency .When the microwave power is up to 250 W (the temperature of lignite char central is about 400 ℃ ) , the denitrification rate can reach 92% .The residence time is increased in the lower space velocity ,which is advantageous to the removal of NO and the adding of O2 accelerates the reduction of NO .The denitrification performance of lignite char is next only to activated carbon and much higher than coke ,showing that the lignite char is a good denitrification material with superior performance .

The toluene was used as solvent to dissolve crude anthracene.The methods of sovlent extraction,azeotropic and recrystallization were used to prepare refined anthracene.The methods of distillation and recrystallization were used to prepare refined phenanthrene.The methods of mixed solvent and recrystallization were used to prepare refined carbazole.The effect of solvent quality,water-bath temperature and azeotropic temperature on the product purity were ivestigated and the best solvent quality,water-bath temperature and azeotropic temperature were determined,in this condition the purity of anthracene,carbazole and phenanthrene from separation could reached 97.882%,91.722% and 75.704%.The structure of production and standard were characterized by infrared spectra and the result was compared and analyzed.The content of anthracene,carbazole and phenanthrene in the product were analyzed by gas chromatography.