基于IAP WS-IF97的管内阻力件能量损失计算模型与分析

ENERGY DISSIPATION COMPUTING MODEL FOR RESTRICTIVE DEVICE IN PIPELINES BASED ON IAPWS-IF 97 AND ANALYSIS THEREOF

热电厂蒸汽管网普遍存在管道阻力件引起的能量损失。为了准确计算蒸汽流经阻力件产生的可用能损耗,提出了蒸汽管网系统能量计量的新观点,即通过IAPWSIF97的蒸汽状态方程,推导出阻力发生过程的熵方程,得到可用能损失计算模型。校验分析结果表明,用该模型计算蒸汽流经阻力件的能量损失,较传统方法方便、准确。

The energy dissipation resulted from restrictive device in pipelines is commonly existing in the steam piping network of a thermal power plant. In order to accurately calculate the available energy dissipation resulted from the steam flowing through a restrictive device, a new view point for measuring energy in steam piping network system has been put forward, i.e. a model for computing the available energy dissipation has been obtained through entropy equation in occurrence process of the resistance, which is deduced from steam condition equation of IAPWS-IF 97. The result of checking analysis shows that the model can be used for calculating the energy dissipation while steam passing through a restrictive device. being more convenient and accurate than using traditional method.