直燃型溴化锂吸收式机组与风冷热泵机组在变工况下运行的一次能耗及环境影响比较

对直燃型溴化锂吸收式机组和电动风冷热泵机组在变工况下的一次能源利用率PER作了比较。在不考虑冷却系统能耗的条件下 ,直燃机的一次能源利用率比风冷热泵高。而在冷却系统水泵扬程较大时 ,直燃机的综合能耗高于风冷热泵。提高直燃机的冷水出水温度可以提高直燃机运行经济性。同时指出了火电厂调峰情况下风冷热泵的能耗更高 ,而在我国以煤为主的能源结构及供电效率较低的现状下风冷热泵机组的环境影响也是不可忽视的。

Comparison to Primary Energy Consumption under Changed Conditions and Its Impact on Environment between Direct Fired Absorption Chiller and Air Source Heat Pump Chiller

Comparison to the Primary Energy Efficiency Ratio (PER) under changed conditions between Direct Fired Absorption Chiller (DFAC) and electric driven Air Source Heat Pump Chiller (ASHP) is introduced. It is stated that primary energy efficiency of DFAC would be higher than ASHP if energy consumption of condenser cooling system is not considered. But the integrated energy consumption of DFAC is higher than ASHP when the delivery head of pump in condenser cooling system is higher .The operating efficiency of DFAC could be improved if outlet chilled water temperature is increased. It is analyzed that the primary energy consumption of ASHP is higher during off-peak period of thermal power and the impact on environment of ASHP is serious due to taking coal as principal of domestic energy structure and lower efficiency power supply.