直供转热站流量热量精准算法与编程

Precision Algorithm and Programming of Flow and Heat for Direct Supply Heat Transfer Station

随着能源战略的实施,供热行业节能的力度进一步加大,热耗的两个基础数据流量和热量的准确度显得越发重要。要实现高精度的流量和热量测量,除了需要高精度的现场测量仪表外,还需精确数学模型。但在以热水为热源的转热站,业界往往没有采取精确计量数学模型。本文对采用密度补偿算法的热水瞬时流量计量数学模型进行剖析,对使用毫秒级定时中断算法的热水累积流量和累积热量计量数学模型进行剖析,通过实例给出了使用上述两种算法的相应程序段。热水密度变化造成的瞬时流量误差及积分时间不固定造成的累积流量、累积热量误差显著降低,从而提高了流量和热量的计量精度。

The strength of the energy saving heating industry further increases with the realization of energy strategy. The accuracy of flow and heat-- two basic data of heat loss appears increasingly important. To achieve high precision of flow and heat measurement, in addition to the need of high precisi0n measuring instrument, precise mathematical model is needed. But in the heat transfer stations hot water as heat sburce, the industry generally does not take the precise measurement mathematical model. The article analyzes measurement mathematical model of instantaneous hot water＇s flow, it uses the density compensation algorithm and analyzes measurement mathematical model of hot water＇s accumu- lated flow and accumulated heat when uses millisecond timer interrupt algorithm .Corresponding procedures section of the above two algorithms by examples are given by experiment. Reducing the instantaneous flow error caused by hot water density changes, the integral time caused the accumulated flow, and accumulated heat＇s error, thereby improves the measuring accuracy of the flow and heat.