一、前言热网络中热力单元的贡献系数反映了单元对热网络堋效率的影响大小与敏感程度。改善热网络的能量利用应从贡献系数大的热单元入手,这些单元是热网络的关键部份。优化一个热网络,对不同单元花相同的财力、物力、人力,其结果是不等的。在某些场合,单元(火用)损失量与单元贡献系数是一一对应的,则在(火用)分析中可省去不少工作,因为判断一个单元的(火用)损失量的大小远比计算其贡献系数来得方便。正因为如此,在实际(火用)分析中,往往有人采用这一方 I. INTRODUCTION The contribution coefficient of the thermodynamic unit in the thermal network reflects the size and sensitivity of the unit to the thermal network efficiency. Energy utilization to improve the thermal network should start with the contribution of large thermal units, which are a key part of the thermal network. Optimize a hot network, spend the same financial resources on different units, material and human resources, the results are not the same. In some cases, the exergy loss and the unit contribution coefficient are one-to-one correspondence, so a lot of work can be saved in the exergy analysis because of the size of the exergy loss of a unit It is more convenient than calculating the contribution coefficient. Because of this, in the actual (exergy) analysis, it is often used by this party