複數台離心式流體機械並聯之複雜管路流量計算

Abstract

本文主要目的為採用多台同型之離心式流體機械的並聯方式，進行複雜管路流量計算。對於複雜管路系統，單台離心式流體機械往往無法提供龐大的流量需求，必須採用多台並聯的方式處理，然而多台離心式流體機械並聯的缺點在於每台流量極易分配不均，由計算結果得知主要受到性能曲線斜率的影響。 本文的另一目的為將效率曲線隨轉速變化的公式求出，並將效率曲線並入模擬計算的過程裡，求得每台離心式流體機械的效率值，進而計算出系統所需的總功率，從不同的並聯台數中，選取出最省能的並聯方式。

In order to provide huge mass flow rate, the centrifugal machineries in parallel are necessary. However, the problem mentioned above is hardly studied. The aim of this study is to solve the complex piping problems with centrifugal machineries in parallel, and to obtain the optimal situation for the centrifugal machineries in parallel. The relating formulas are derived from affinity law and a method of curve fitting is adopted to express the parameters used in the above formula. As a result, the most efficient satiation among the possible situations could be determined. The another aim of this study is to formulate the equation of the efficiency curve varied with the rotation rate. We can count the efficiency of each centrifugal fluid machineries in any rotation rate, and then we will obtain the used power of the system. The optimal operation choice of different numbers of the parallel fluid machineries will be got.