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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。
Based on the law of conservation of mass and energy, a dynamic model of indirect connection zone heating system including circulating water pump and control valve model was established. Using this model, the effects of outdoor temperature, solar radiation and indoor heat on the system water temperature and room temperature were simulated. Taking one week’s actual meteorological parameters as external disturbances, the operation and energy consumption of the system were simulated and analyzed with five different control strategies. The results show that the control precision of room temperature is the best when the boiler fuel quantity control boiler water supply temperature is controlled in combination with the regulation of the primary network and the radiator flow rate. When the boiler fuel quantity is controlled to control the boiler feed water temperature and the primary network circulation flow rate is controlled jointly, The system energy consumption is the smallest; when a net adopts a variable speed circulating pump, the power saving effect is remarkable.