超临界再热双抽背压机组运行特性分析
朱开轩¹，周托²，王随林¹
（1. 北京建筑大学环境与能源工程学院，北京 100032；2. 清华大学能源与动力工程系，北京 100089）
摘要： 阐述了热电联产常见的几种方式，分析比较了各自的优缺点，基于热量法给出了热电联产机组的经济评价指
标。以一电厂170 MW 超临界再热双抽背压机组为例，对不同抽汽工况下的机组热经济性指标进行了计算，同时与350 MW
单抽凝汽式机组和纯凝机组进行比较。结果表明，从热经济性的角度来说，双抽背压机组优于单抽凝汽式机组和纯凝机
组，能大大降低机组热耗和发电标准煤耗，显著提高发电热效率。
关键词： 热电联产；超临界再热双抽背压机组；抽汽工况；热经济性
中图分类号： TM621     文献标志码： A     文章编号： 2095-0802-(2022)10-0146-04
Operation Characteristics of Supercritical Reheat Double Pumping Back Pressure Unit
ZHU Kaixuan¹, ZHOU Tuo², WANG Suilin¹
(1. School of Environmental and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100032,
China; 2. Department of Energy and Power Engineering, Tsinghua University, Beijing 100089, China)
Abstract: This paper described several common ways of cogeneration, analyzed and compared their advantages and disadvantages,
and gave the economic evaluation index of cogeneration unit based on heat method. Taking 170 MW supercritical reheat double
pumping back pressure unit of a power plant as an example, the thermal economic indexes of the unit under different pumping
conditions were calculated, and compared with 350 MW single pumping condense unit and pure condense unit. The results show
that from the point of thermal economy, the double pumping back pressure unit is superior to the single pumping condense unit
and pure condense unit, which can greatly reduce the heat consumption of the unit and the standard coal consumption of power
generation, and improve the thermal efficiency of power generation significantly.

Key words: cogeneration; supercritical reheat double pumping back pressure unit; extraction conditions; thermal economy