八种不同的制冷剂被评估为潜在的R-22替代品。通过计算机模拟确定了制冷剂在冷却和加热模式下的性能。调节每种制冷剂的体积流量，以在系统性能额定条件下提供相同的冷却能力，同时保持热交换器尺寸恒定。使用制冷剂对全球变暖的影响取决于直接贡献（假设年泄漏率为4%）和发电阶段二氧化碳生产产生的能源使用间接贡献。根据美国当前的能源生产和消费数据确定产生的二氧化碳量，并评估为0。 191千克/焦耳（1.234e-4磅/英热单位）。结果表明，从能源效率和总等效增温影响（TEWI）的角度来看，R-410A在不可燃制冷剂中的性能最好。在八种替代制冷剂中，纯R-32以及R-290和R-134a的可燃混合物具有比R-410A更高的季节性能和更低的TEWI。尽管丙烷的直接全球变暖潜能（GWP）可以忽略不计，但其TEWI几乎与R-407C相当，后者的GWP相对较高。R-407C和R-407E的TEWI仅比R-410A高4%左右。对于所有制冷剂，在性能额定条件下，GWP小于TEWI的7.5%。 单元:双引文:研讨会，ASHRAE交易，第105卷，第。1.

Eight different refrigerants are evaluated as potential R-22 substitutes. The performances of the refrigerants in cooling and heating modes are determined using a computer simulation. The volumetric flow rate for each refrigerant is adjusted to provide equal cooling capacity at the performance rating conditions of the system while keeping the heat exchanger sizes constant. The impact on global warming by using the refrigerants is determined based on both the direct contribution (assuming a 4% annual leak rate) as well as the indirect contribution from energy use arising from CO2production at the power generation stage. The amount of CO2produced is determined based on current United States energy production and consumption data and is evaluated to be 0.191 kg/MJ (1.234e-4 lb/Btu). The results indicate that from the point of view of energy efficiency as well as total equivalent warming impact (TEWI), R-410A has the most favorable performance among nonflammable refrigerants. Among the eight alternative refrigerants, pure R-32 as well as a flammable blend of R-290 and R-134a have higher seasonal performance and lower TEWI than R-410A. Although propane has negligible direct global warming potential (GWP), it has a TEWI almost that of R-407C, which has relatively higher GWP. The TEWI of R-407C and R-407E are only about 4% higher than that of R-410A. For all the refrigerants, the GWP is found to be less than 7.5% of the TEWI at the performance rating conditions.Units: Dual