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.

• 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。