燃气发动机与电动机联合驱动热泵供热工况运行策略研究

Research on the Operation Strategy on Heating Mode of Hybrid Power-driven Heat Pump with Gas Engine and Motor

由燃气发动机和电动机联合驱动的混合动力热泵(HPHP)是提高燃气供热和制冷效率的发展方向之一,但其在系统设计和运行策略上还存在提升空间。本文提出了供热和供冷均由燃气发动机与电动机联合驱动的HPHP,并建立数学模型。通过模型计算,针对设计工况下发动机占最大输出功60%下的HPHP,并与燃气机热泵(GEHP)和电热泵(EHP)进行对比,分析了不同环境温度下的发动机效率和一次能源利用效率(PER)。结果表明:HPHP可减小发动机容量,当环境温度为-9～-1℃时,HPHP的发动机效率相比于GEHP提高了3.2%～9.4%;对于PER,HPHP与EHP相比于GEHP有较大的提高;当室外温度为-9～3℃时,与EHP相比,HPHP的PER比EHP提高了1.2%～9.5%,当温度继续升高时HPHP与EHP的PER较接近。因此从整个供暖季的能效角度考虑,HPHP系统相比于GEHP和EHP具有较大的节能潜力。

To improve the efficiency of space heating and cooling, the hybrid power-driven heat pump （HPHP） has been established.However, both the design method and operation strategy are too simplified, thus optimization is needed. In this paper, the HPHP with agas engine and motor is put forward, and a mathematic model of HPHP is established to analyze its operation performance under a typicaldesign （i. e. , the gas engine takes 60% of the torque output under the design condition）. The efficiency and primary energy ratio （PER）of the HPHP is also compared with gas enginedriven heat pump（GEHP） and electrical heat pump （EHP） under different temperatures.The results show that the HPHP system can achieve 3. 2% - 9. 4% improvement of engine efficiency compared to the GEHP when ambienttemperature is in the range from - 9 ℃ to - 1 ℃. In terms of PER, the HPHP system and EHP system have obvious improvement compared to the GEHP system. As for the EHP system, the PER improvement of HPHP system is 1. 2% - 9. 5% in the range of - 9 - 3 ℃.Besides, when the temperature increase, the PER of HPHP system is close to that of EHP system. Therefore, it can be indicated theHPHP system can achieve higher energy saving potential for the whole heating season.