电厂循环水与热泵耦合供暖能效分析

ENERGY EFFICIENCY ANALYSIS OF CIRCULATING WATER OF POWER PLANT AND HEAT PUMP COUPLING HEATING

为降低热电联产机组在集中供暖过程中的能耗,提出一种电厂循环水与热泵耦合的供暖方式,建立该采暖模式的能效计算模型,并以某350 MW超临界供热机组为例,计算该模式的能效指标。计算结果表明,在热泵制热系数4以上时,无论管网效率高低,系统供电量均增加。热泵制热系数越高,供热管网效率越低,系统供电量增加越大,相同煤耗量时最高供电功率能够达到25 MW以上。

In order to reduce the energy consumption of cogeneration unit in the process of central heating,a heating method of comprised by circulating water and heat pump was proposed,and the energy efficiency calculation model of the heating system was established. A 350 MW supercritical heating unit is taken as an example and the energy efficiency of the model was calculated. The calculation results show that when the heating coefficient of the heat pump is 4 or above,the system power supply increases regardless of the efficiency of the pipe network. The higher heat pump heating coefficient is higher,the lower the efficiency of heating pipe network and the greater the power supply increase of the system,in which maximum power supply can reach more than 25 MW at the same coal consumption.