节点风压解算通风网络的改进方法  

Improved Algorithm for Solving Ventilation Network Based on Junction's Air Pressure Method

作　　者：陆秋琴[1] 黄光球[1] 马亮[1] 

机构地区：[1]西安建筑科技大学管理学院,陕西西安710055

出　　处：《湖南科技大学学报（自然科学版）》2007年第3期85-89,共5页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：陕西省教育厅专项基金资助项目(06JK258)

摘　　要：当通风网络存在按需供风的分支且用节点风压法对通风网络进行解算时,将按需分风带来的节点风量代数和归零误差(又称不平衡差)全部集中在那些按需供风分支上,这给风量调节实施带来一定的困难,因为这些分支常常是工作场地.为解决此问题,提出了一种新的节点风压法通风网络解算思路.该思路通过使所有节点风量代数和归零误差的平方和最小化,建立了节点风压法通风网络解算模型,并获得了一种新的节点风压法风网解算算法.解算结果表明:若某节点的不平衡差恰好为0,则该节点相关分支不需进行风量调节;否则,与该节点相关的分支需要进行风量调节来消除该不平衡差.这样一来,可将最小不平衡误差根据工程实际需要分散到所有或部分节点的相关分支上,而不是将不平衡差完全集中在少数按需供风分支上.该方法理论上考虑到了通风系统按需供风分支的存在,具有理论完善、结果正确、可降低风量调节实施的难度的特点.When there exist the branches whose air volume are supplied on demand in a ventilation network and the junction＇s air pressure method is used to solve the ventilation network, the solution obtained from the method may fully concentrate the reducing-zero error （called the unbalanced error） of junctions resulting from air volume allocation on demand on these branches with fixed air volume, which may cause great difficulty for implementation Of air volume adjustment because these branches are often the working sites. To solve the problem, a new idea was represented based on junction＇s air pressure method, by which a ventilation network solving model was created by minimizing squared sum of reducing-zero error of air volume of all junctions, therefore a new algorithm of ventilation network solving was obtained. The result shows that if a junction＇ s unbalanced error is zero, then air volume adjustment on the branches associated with the junction are not needed to implement; else air volume adjustment on the branches associated with the junction are needed in order to eliminate the unbalanced error. Thus the minimum unbalanced error is dispersed over the branches of all or some of junctions, not these branches with fixed air volume. The new method theoretically gives consideration of existence of branches with fixed air volume in a ventilation network, and there are characteristics of theoretical perfect, correct result and low difficulty of implementation of air volume adjustment, 1fig., 1 1refs.

关 键 词：通风系统 通风网络解算 节点风压法 

分 类 号：TD725[矿业工程—矿井通风与安全] TP18[自动化与计算机技术—控制理论与控制工程]