含吸收式热泵的高能效热电厂优化运行研究

Optimal Operation of High Energy Efficiency Combined Heat Power Plant With Absorption Heat Pump

针对乏汽余热利用方案的差异性对比,文章首先基于吸收式热泵整体建模,建立配置最佳容量吸收式热泵后抽凝机组的可行运行区间模型以及煤耗函数模型。以此为基础,量化分析配置吸收式热泵较低压缸可灵活切除改造、高背压改造二者在运行灵活性、调峰成本和供热能力方面的优劣,提出包含3种余热利用方案的高能效热电厂厂内机组优化调度通用模型。最后根据东北某热电厂的数据,在不同场景下校验了3种余热利用方案的差异,进一步总结不同余热利用方案并存时,厂内不同类型机组之间的协同运行规律。

Focused on the difference of exhausted steam heat reused schemes, based on the overall modeling of the absorption heat pump, the feasible operation range of the CHP unit with absorption heat pump were established. In this way, quantitative advantages of operational flexibility, regulation costs and heating capacity of flexible cut-off of low pressure cylinder transformation, back pressure transformation and configuration absorption heat pump are compared and analyzed, and a general model of equipment optimization scheduling in high energy efficiency CHP plant with the three exhausted steam reused schemes is proposed. Based on the data of a CHP plant in Northeast China, the three waste heat utilization schemes have been analyzed quantitatively, which verifies the comprehensive advantages of the configuration absorption heat pump scheme in terms of regulation capacity and cost. Based on that, the cooperative operation patterns in different types of units have been summarized when different residual heat utilization schemes coexist.