上海市某热电厂三联供系统运行效益研究

本文阐述了上海某热电公司运用热电冷联产系统的系统形式、热电公司供给现状,分析该公司全年用能规律、运行策略及联产系统不同季节下热电比,对比两种不同系统形式(热电冷联产系统与分产系统)下的能耗及环境性能并提出优化系统运行的运行策略。结果表明:该热电公司在产生相同的蒸汽量的条件下,热电冷联产系统用煤量少于分产系统,全年整体节煤率约3.94%。热电冷联产系统环境收益比分产系统显著,运行期间减少污染物NOx0.1 t、SO27.1 t。优化运行策略后,夏季、过渡季相对于改进前系统节煤率分别为23%、11%。

Environmental and Economic Benefits Evaluation for the CCHP System of a Thermal Power Plant in Shanghai

The energy consumption pattern and operation strategy of a combined cooling, heating and power generation (CCHP) system at a thermal power plant in Shanghai was introduced and the heat-to-electric ratio in all seasons were analyzed. The operation of the plant was optimized by evaluating the environmental and economic benefits by comparing CCHP to the system that separates cooling, heating and power generation. The results shown that, to generate the same amount of steam, the coal consumption could be reduced by 3.94 % by using the CCHP system compared to the independent system. The NOx and SO2 emissions could also be reduced by 0.1 t and 7.1 t, respectively. Furthermore, theoretically speaking, the coal consumption could be reduced by 23% and 11% in summer and transition season, respectively, after optimizing the operation of the plant.