一、水力失调的原因 　　在进行供热和空调水力管网系统设计时，首先根据局部冷 (热 )负荷确定每一个末端装置的水流量。然后根据管网确定支管、立管、干管尺寸，同时进行管网环路平衡计算。但实际运行时，各环路及末端装置中的水充量并不一定按设计要求输配，原因主要有两个方 First, the causes of hydraulic imbalance In the heating and air conditioning system design of hydraulic pipe network, first of all based on local cold (heat) load to determine the water flow of each end device. Then according to the pipe network to determine the branch pipe, riser, pipe size, pipe network loop balance calculation. However, in actual operation, the water charge in each loop and the terminal device may not be transmitted and distributed according to the design requirements. There are mainly two parties