接连接区域供暖系统控制策略及能耗分析
Control strategies and energy consumption of an indirect district heating system
摘要：
基于质量和能量守恒定律，建立了包括循环水泵和调节阀模型的间接连接区域供暖系统动态模型。利用该模型，模拟分析了室外温度、太阳辐射和室内得热量对系统水温和室温的影响。以一周的实际气象参数为外扰，模拟分析了采用5种不同控制策略时系统的运行及能耗状况。结果表明：调节锅炉燃料量控制锅炉供水温度与调节一次网和散热器流量联合控制时，对室温的控制精度最佳；调节锅炉燃料量控制锅炉供水温度与调节一次网循环流量联合控制室温时，系统能耗最小；当一次网采用变速循环水泵时，节电效果显著。
Abstract：
Develops a set of dynamic models for an indirect district heating system, including the models of pumps and adjusting valves, in terms of the mass and energy principles of conservation. Simulates and analyses the influences of outdoor temperature, solar radiation and indoor heat gains on the system water temperature and indoor temperature. Simulates the system operational states and the energy consumption in five different control strategies, based on oneweek actual meteorological parameters as outer interference. The results show that the most stable indoor temperature could be achieved when implementing the joint control strategy of adjusting the fuel consumption of the boiler to control the water supply temperature, the primary piping network and the radiator circulating water flow rates. The energy consumption is the lowest when implementing the joint control strategy of adjusting the fuel consumption of the boiler to control the supply water temperature and the primary piping network flow rate to control the of indoor temperature. The power consumption would be greatly reduced if variable frequency circulating pump is applied to the primary piping network.
Keywords:indirectdistrictheatingsystem,dynamicmodel,controlstrategy,dynamicresponse,energyconsumption