大规模复杂通风网络节点风压解算方法

当通风网络存在按需供风分支且用节点风压法对该风网进行解算时，解算结果会将因按需分风带来的节点风量代数和归零误差全部集中在这些按需供风分支上，给风量调节的实施带来一定困难。为解决此问题，该文通过使所有节点风量代数和归零误差的平方和最小化的方法，建立节点风压通风网络解算模型，获得一种新的通用节点风压法风网解算算法。该算法可将最小归零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，而不是将其完全集中在少数按需供风分支上。该方法理论上考虑到风网中需供风分支的存在，可覆盖多种复杂条件下的风网解算，具有理论完善、结果正确、可降低风量调节实施难度的特点。

Junction's Air Pressure Solution for Large-scale Complicated Ventilation Networks

When there exist the branches whose air volume is supplied on demand in a ventilation network and the junction’s air pressure method is used to solve the network, the solution may fully concentrate the reducing-zero error of junctions resulting from air volume allocation on demand on these branches with fixed air volume, which brings great difficulty to implement air volume adjustment. To solve the problem, a new thought is represented based on the junction’s air pressure method, by which a ventilation network solving model is created by minimizing the squared sum of the reducing-zero error of all junctions’ air volume, therefore a new algorithm of ventilation network solving is obtained. The algorithm can disperse the minimum reducing-zero error over the branches of all or some of junctions, not the branches with fixed air volume. The new method theoretically considers the branches with fixed air volume in a ventilation network, and can solve many complicated types of ventilation network, with the characteristics of theoretical perfect, correct result and low difficulty of implementation of air volume adjustment.