热电厂热经济指标的简化算法

A Simplified Algorithm for the Heat Economy Index of Thermal Power Plant

热电联产是提高能源有效利用率的重要途径,但其热经济指标的计算并不容易。其中,热化发电率和分项热经济指标是评价热电联产技术完善程度的指标,在所有热经济指标中占有重要地位。拟将热电联产机组的热力循环分为凝汽循环和供热循环,对两种循环利用热力系统状态方程原理,得出其各自的热状态参数,在此基础上计算供热机组的热化发电率及分项热经济性指标,使这两类的指标计算得以简化,并能方便地应用于工程实际之中。

Combined heat and power （CHP） is a more important mode in improving energy utilization, but how to appraise its thermo-economics objectively is not very easy. Thermoficated generating rate and sub-item thermo-economics index are two kinds of indexes to appraise it and more practical and relative objective than others. In this paper, combined heat and power unitg thermodynamic cycle is separated into the condensate steam circle and the heating cycle, using the thermody- namic system equation otr state principle respectively. Then its respective thermodynamic system state parameter will be obtained. Based on these parameters, the heat-supplying unit＇ s thermoficated generating rate and sub-item thermo-economics index can be calculated. This method simplify the computation of these two index and is easy to compile in computer and apply in engineering.