To reduce the energy consumption of the heating, ventilation and air conditioning system, a novel dual heat source warm-air heating system (DWAHS) was developed in this study. A dual heat source air source heat pump was applied to satisfy the warm air segmented handling process first time. The theoretical model of the system was established, and ecofriendly refrigerants, such as R290, R600, R134a, R600a and R1234yf were adopted as the working fluids. The system performance indicators, including the energy efficiency ratio (EER), heat volumetric heating capacities (q_v), and exergy loss (Ex_d), were investigated and compared with those of a conventional single heat source warm-air heating system (SWAHS). The results showed that the DWAHS significantly reduces Ex_d by handling the supply air segmented using 35 and 60 °C hot water, which were simultaneously supplied by a dual heat source air source heat pump. Among the refrigerants, eco-friendly refrigerants R290 and R600 exhibited the best performance under low and high air-temperature conditions, respectively. Moreover, the DWAHS achieved an increase of 13.3%–64.3% in EER and q_v when compared with the SWAHS under different operational temperatures. In addition, the DWAHS reduced the Ex_d by 13.8%–42.7% compared with the SWAHS. Finally, the Ex_d of the heat pump consumed a significant part of the warm-air heating system Ex_d at low environmental temperatures. However, the percentage of the Ex_d of the air-handling process significantly increased with the temperature of the environment.

为了减少供暖，通风和空调系统的能耗，本研究开发了一种新型的双热源暖风供暖系统（DWAHS）。应用双热源空气源热泵来满足第一次热空气分段处理过程。建立了系统的理论模型，并采用了R290，R600，R134a，R600a和R1234yf等环保型制冷剂作为工作流体。系统性能指标，包括能效比（EER），热容热容量（q _v）和火用损耗（Ex _d），并与传统的单热源暖空气加热系统（SWAHS）进行了比较。结果表明，DWAHS通过处理分别使用双热源空气源热泵同时供应的使用35和60°C热水分割的送风来显着降低Ex _d。在制冷剂中，环保型制冷剂R290和R600分别在低温和​​高温条件下表现出最佳性能。此外，与不同工作温度下的SWAHS相比，DWAHS的EER和q _v增加了13.3％–64.3％。此外，DWAHS减少了Ex _d与SWAHS相比，增长了13.8％–42.7％。最后，在低环境温度下，热泵的Ex _d消耗了热空气加热系统Ex _d的很大一部分。但是，空气处理过程中Ex _d的百分比随环境温度的升高而显着增加。