燃气三联供和江水源热泵复合系统数学模型的建立和分析

Mathematical Modelling and Studying of the Composite System of CCHP and River Water Source Heat Pump

当今世界能源紧缺,燃气三联供和江水源热泵的复合系统能提高能源利用率,且之前研究较少。针对冷热电三联供和江水源热泵组成的复合联供系统,通过建立复合系统数学模型,对复合联供系统进行分析。建模的主要设备包括内燃机、烟气热水型吸收式制冷机组、江水源热泵机组。分析发现,内燃机的发电效率随着机组负载率的增加而增加,当机组负载率低于50%时,机组发电效率随着负载率降低而急剧下降,机组发电高效区间出现在50%-100%。烟气热水型吸收式制冷机组热力系数受冷却水温度及烟气温度的影响,冷却水温度越高热力系数越低,烟气温度越高热力系数越高。

The composite system of CCHP and river water source heat pump can increase energy efficiency, but few researches have been undertaken about it under the background of lack of energy. Aiming at the composite cogeneration system composed of the cold heat and power tri-eneration system and the river water source heat pump system, this article carries on analysis of the composite cogeneration system through building the mathematical model. The main equipment includes internal combustion engines, gas hot water operated absorption refrigeration units and river water source heat pump units. Analysis shows that the power generation efficiency of internal combustion engine increases as the unit load rate increases. When the unit load rate is lower than 50%, the efficiency of generating units fall sharply as the load rate reduces. Generating efficient range of generating units appeared in 50%-100%. The thermal coefficient of hot water operated flue gas absorption refrigeration unit is affected by cooling water temperature and the flue gas temperature, the higher the cooling water temperature refrigeration coefficient is lower, the higher the flue gas temperature refrigeration coefficient is higher.