Analysis Of Energy-saving Technology And Measure In Central Heating System

With the rapid development of city construction, living standard of people has improved and demand of People on indoor comfort increases, however, energy comsumpustion has accordingly increases greatly, especially in China, annual building energy consumption about accounts for 30% of total energy consumption, which enlarges gap from developed country. In order to reduce building energy consumption, a number of energy-saving policies come out, and a lot of energy-saving buildings are constructed in all over the country. For heating system, in addition to paying attention to energy-saving of building enclosure, improving system efficiency is anotherimportant issue.Combined with project of thermoelectric station in Tianjin Dongli Development Zone, existing problems and energy-saving technologies are analyzed on detail. The results show that equipments in boiler room should be energy-saving, such as blower with frequency conversion, circulating pump with frequency conversion, feed pump with frequency conversion, heat flowmeter, computer monitoring system, climate compensation, heat exchange units, electric control valve in primary side and balance unit in heat transfer station and entrance of heat medium and so on.In the paper, energy-saving effect of boiler system, recycling water system, network system and computer monitoring system after reconstruction is also analyzed, for example, by increasing temperature difference of supply and return water, from original 20~30℃to 20℃~60℃, 35~40% of electrical energy could be saved.According to analysis of economic, environmental and social benefits to the heating system, 2,600 tons of standard coal could be saved in 2007~2008. At the same time, emission of pollutants reduces, and heating equialty improves, which ensure indoor comfort in winter, as well as good economic, environmental and social benefits.