R1234ze(Z)和R1234ze(E)的区别在于它们是同一制冷剂的两种不同异构体，这意味着它们具有相同的分子式但分子结构不同。 这导致不同的物理和热力学性质，例如沸点、临界温度和体积容量。
R1234ze(Z) 的沸点更高，为 9.8°C，而 R1234ze(E) 的沸点为 -18.95°C。 这意味着R1234ze(Z)不适合低温应用，但可用于高温热泵1。 R1234ze(E) 的沸点较低，这使得它与常用制冷剂 R134a 更相似2。
与 R1234ze(E) 的 109.4°C 相比，R1234ze(Z) 的临界温度也更高，为 153.7°C。 这意味着 R1234ze(Z) 可以在更高的压力和温度下运行，这可能会提高某些系统的效率1。 R1234ze(E) 的临界温度较低，这限制了其工作范围3。
R1234ze(Z)的容积比R1234ze(E)低，这意味着它需要更多的质量流量和更大的压缩机才能达到相同的冷却效果1。 R1234ze(E)具有更高的容积，这使得它与现有设备更兼容2。
R1234ze(Z) 和 R1234ze(E) 的全球变暖潜势 (GWP) 都非常低，分别为 7 和 6，这意味着它们对环境的影响极小12。 它们也是无毒且轻度易燃的，属于 ASHRAE 安全等级 A2L12。
The difference between R1234ze(Z) and R1234ze(E) is that they are two different isomers of the same refrigerant, which means they have the same molecular formula but different molecular structures. This results in different physical and thermodynamic properties, such as boiling point, critical temperature, and volumetric capacity.
R1234ze(Z) has a higher boiling point of 9.8°C, compared to R1234ze(E)'s -18.95°C. This means that R1234ze(Z) is not suitable for low-temperature applications, but can be used in high-temperature heat pumps1. R1234ze(E) has a lower boiling point, which makes it more similar to R134a, a commonly used refrigerant2.
R1234ze(Z) also has a higher critical temperature of 153.7°C, compared to R1234ze(E)'s 109.4°C. This means that R1234ze(Z) can operate at higher pressures and temperatures, which may improve the efficiency of some systems1. R1234ze(E) has a lower critical temperature, which limits its operating range3.
R1234ze(Z) has a lower volumetric capacity than R1234ze(E), which means that it requires more mass flow and larger compressors to achieve the same cooling effect1. R1234ze(E) has a higher volumetric capacity, which makes it more compatible with existing equipment2.
Both R1234ze(Z) and R1234ze(E) have very low global warming potentials (GWP) of 7 and 6, respectively, which means they have minimal impact on the environment12. They are also non-toxic and mildly flammable, belonging to the ASHRAE safety class A2L12 .
