Method of branch ariflow for calculatinga complicated mine ventilation networks

• 来源期刊: 煤炭学报（英文版）
• 学科: 工学
• 年，卷（期）: 2001,（1）
• 页码范围: 64-69
• 页数: 6页
• 分类号: TD82
• 语种: 英文

摘要

The solutions widely used at preeent for calculating complicated mine ventilation networks are ones in which resistance of the branches and characteristic parameters of the fans are taken as basic input data. But it is time-and-energy-consuming to obtain the branch resistance values. A new solution is developed in this peper in which the branch reeistance values are obtained through measuring and evaluating the airflow of the whole ventilation network. Theoretical analysis is made of the establishment of a linear equation series with branch resistance as unknown numbers, an equation series for which one, and only one, result of solutions exists. This solution is programmed in C language and passed on a personal computer. The programmed solution programmed proves of practical use, as demonstrated by specific examples. Being different from other solutions, the method takes the branch airflow and fan working points as basic input data, and the present solution is of greater advantage for calculating ventilation networks of mines in operation.