Abstract At present, the 300 MW extraction condensing turbine units are still the dominant heat sources of cogeneration heating in China. With a rapid increment of heating scale, combined heating with multi turbine units has applied extensively in cogeneration plants. The novel cogeneration heating system can achieve efficient utilization of the condensed waste heat (CWH) of cogeneration plants with multi turbine units, through organically combining the technical elements, such as improving the backpressure of turbine units, using the absorption heat pumps (AHPs), and lowering the return water temperature of heating network. This article takes the 300 MW water-cooling turbine units as analysis objects, adopts the method of the equivalent electricity of heating for energy consumption evaluation, and aims at minimizing the heating energy consumption of the system. Considering the influence on system economy is dominated by the heating energy consumption, the optimization of system configuration is guided by the heating energy consumption analysis. The elaborate and intensive analysis focuses on the optimum system configuration under different numbers of turbine units and different return water temperature. According to the application environment, the system configuration is discussed on the flexible high-backpressure heating mode (FHBM) and the restricted high-backpressure heating mode (RHBM). Through analyzing the variation regularities of the optimum crucial parameters under different conditions, it reveals the internal causes of energy consumption change of the heating system. On this basis, from the perspective of system design, this article summarizes the applicability of the novel high backpressure heating system (NHBS) and the novel absorption heat pump heating system (NAHPS). Furthermore, it refines the configuration optimization principles for the novel cogeneration heating system with multi turbine units. The conclusions are expected to indicate the optimization directions of system design.

中文翻译：

---

新型多汽轮机组热电联产供热系统配置优化

摘要 目前，300 MW 抽汽凝汽式汽轮机组仍是我国热电联产供热的主要热源。随着供热规模的快速增长，多机组联合供热在热电联产厂得到广泛应用。新型热电供热系统通过将提高汽轮机组背压、利用吸收式热泵（AHP）、降低热网回水温度。本文以300 MW水冷汽轮机组为分析对象，采用供热等效电量法进行能耗评价，并旨在最大限度地减少系统的加热能耗。考虑到系统经济性的影响主要是供热能耗，系统配置的优化以供热能耗分析为指导。详细而深入的分析集中在不同汽轮机机组数和不同回水温度下的最佳系统配置。根据应用环境，讨论了柔性高背压加热模式（FHBM）和受限高背压加热模式（RHBM）的系统配置。通过分析不同条件下最优关键参数的变化规律，揭示供热系统能耗变化的内在原因。在此基础上，从系统设计的角度，本文总结了新型高背压供暖系统（NHBS）和新型吸收式热泵供暖系统（NAHPS）的适用性。进一步细化了新型多汽轮机组热电联产供热系统的配置优化原则。该结论有望指明系统设计的优化方向。