由于传统的算术平均温差在换热器的近似计算中相对误差较大，导致根据它得到的供热系统调节参数不仅精度差，而且需要修正。
Because the approximation errors using the arithmetic mean temperature in the computation of heat exchanger are great , the regulated parameters of district heating systems need to be corrected .
算术平均温差