供热空调管网大变化灵敏度计算模型及应用  

Calculation model and application of large change sensitivity in heating and air-conditioning pipe networks

作　　者：孙多斌[1,2] 王树刚[1] 解茂昭[1] 唐大伟[2] 

机构地区：[1]大连理工大学能源与动力学院,辽宁大连116024 [2]中国科学院工程热物理研究所,北京100190

出　　处：《大连理工大学学报》2009年第3期360-363,共4页Journal of Dalian University of Technology

摘　　要：在稳态流体管网灵敏度基础上,通过构造一个实值函数获得一种形式的管网节点压力方程,在该方程的系数矩阵中引入动力源的压头性能曲线,最后推导出包含动力源压头变化时管网大变化灵敏度的计算公式和求解方法.通过算例对比分析,验证了所导出的大变化灵敏度计算模型的正确性和算法的有效性.当系统组件的阻抗产生波动之后,系统输出的压头将随着动力源特性曲线上工况点的移动而发生变化.表明考虑动力源压头特性曲线之后使得管网大变化灵敏度的计算更符合实际.该模型在管网系统故障诊断、管网在线模拟以及管网的实际运行特性评估等方面具有较大的应用潜力.Based on sensitivity of steady fluid pipe networks, a real-valued function is introduced to derive a nodal pressure equation with performance curve of driving power, and the extension of large change sensitivity （LCS） with constant head of driving power to calculation of LCS with performance curve of driving power is discussed. The calculation model of LCS is examined by comparing it with the example. The effectiveness of the proposed calculation model and its algorithm of LCS with performance curve of driving power is demonstrated. It becomes so faster and more efficient for computational complexity that the response to a component perturbation is calculated through LCS by solving a reduced set of final equations. LCS also causes a great reduction in overall computational cost for the solution of a large number of component perturbations. LCS is a method for efficiently solving pipe networkrs response to parameter variations that need not be small. The calculation model of LCS shows an adaptation to the work of evaluating the real characteristic of the network, online simulating and fault diagnosing.

关 键 词：大变化灵敏度 计算模型 管网 

分 类 号：TU833.12[建筑科学—供热、供燃气、通风及空调工程]