以总能系统观点与用热终端高效化为特征的大中型火电机组联产供热系统新模式

以总能系统观点为指导，本文把联产供热系统视为由六个子系统组成，提出了各子系统火用效率的计算方法和这些效率对供热煤耗和成本的影响，并在此基础上提出了能适用于大中型火电机组的热电联产供热系统的新模式。新模式以用热终端高效化为特征，带动提高一系列子系统的火用效率，并把行之有效的，但一般是小规模孤立使用的现代化节能技术与节能设备，大规模地有机地与热电联产系统融为一体，扩大热网水的降温幅度，对热网水低品位能量进行梯级利用，形成采暖节能与增供电力相互促进相得益彰的机制，使联产供热的煤耗和供热成本大幅度地降低。文中结合世界技术现状和我国经济发展阶段分析了新模式的现实可行性。

Novel Model of CHP Heating System for Sizable Power Units

Based on the total energy system concept this paper propose a novel model of CHP heating system for sizeable power generating units with reheat.The heating system is viewed as a composition of six subsystems.The novel model is characterized by making use of end use heat radiators with high exergy efficiency and exergy efficiencies of a series of other subsystems are thus significantly enhanced.Modern energy saving techniques and devices,normally applied in relatively small scale and isolatedly from power generation are now integrated into a large scale CHP heating system to form a cascade utilisation scheme of low grade heat so that the heat and power generation interact favorably on each other and the unit feul consumption as well as unit cost of the supplied heat are thus significantly reduced.