The Comparison And Studing On The System Of Constant-variable Flow Adjustment And Frequency Adjustment

With the rapid development of China’s economy, energy has become a basic development in all areas. "World energy statistics yearbook", published in 2012, shows that China’s energy consumption has accounted about 20.3% of global consumption, and China has become the world’s largest energy consumer. But the energy efficiency of China especially the energy consumption in building energy conservation is very low. In the North China, The energy consumption of heating system region accounted 24.1% of the building energy consumption. With the continuous improvement of people’s requirement of comfort and the state heating system gradually perfect, the energy consumption of heating system in China will further increases. The energy consumption of central heating system will impact the total amount of China’s energy consumption directly. The improvement of the energy efficiency of heating system will much reduce China’s consumption and energy loss effectively.Reasonable adjustment method used in heating system will play a very crucial role in reducing the energy consumption of our country. In recent years, research on China’s regulation of the heating system has achieved great progress, the diversification of the heating system improve energy efficiency obviously. But our country still has great potential in the aspect of improving the efficiency of the heating pipe network.Firstly, constant-variable flow adjustment method and frequency adjustment method in the heating system regulation are theoretical analyzed. The calculation formula of the energy consumption of the boiler and the electricity consumption of the pump are observed by using the supply and return water temperature and flow regulation calculation method of constant-variable flow adjustment and flow regulation calculation method of frequency adjustment, and the energy consumption of variable frequency pump and the energy consumption of boiler in the two regulation of heating system are calculated and analyzed.Secondly, the energy consumption data and power consumption data of heating system of a campus in winter in 2014-2015 are collated and analyzed. Frequency adjustment method is used in the heating system of the campus. According to the change of load each month, the energy consumption data and Power consumption in different period are got.Thirdly, the heating system used frequency adjustment method is simulated by using the TRNSYS software. The unity of simulation result and measured data are verified. And then simulate the heating system used constant-variable flow adjustment method. The total energy consumption of the heating system using the two method for are analyzed and compared. the energy conservation and economy of the heating system using the two kinds of adjustment method in different periods and in the entire heating season.