1节能技术改造前供热系统存在问题概述北京市某中等专业学校全校建筑供热面积为67000m~2左右。供热采用3台燃气热水锅炉,其中2.8MW锅炉两台,1.4MW锅炉一台。直至2006年6月,锅炉已经运行2个采暖季。着重分析热水供暖系统的问题。学校原来室外供热管网根据压力不同和锅炉一次水循环系统分成高低压管网两个回路:高压供暖回路2 1 energy-saving technology before the transformation of heating system problems Overview Beijing a secondary vocational schools school building heating area of ​​67000m ~ 2 or so. Heating 3 gas hot water boiler, of which two 2.8MW boiler, 1.4MW boiler one. Until June 2006, the boiler had been running for 2 heating seasons. Focus on the analysis of hot water heating system. The school original outdoor heating pipe network under the pressure and the boiler water cycle system is divided into two high and low pressure pipe network: high-pressure heating circuit 2