作为传统氢氟碳化合物制冷剂的替代品，易燃制冷剂在工业、商业（固定和移动）和住宅应用中的应用越来越广泛。除了具有较低的全球变暖潜能和臭氧消耗水平外，使用这些替代制冷剂的暖通空调和制冷系统已证明其性能和能源效率有所提高。然而，尽管有这些优点，易燃制冷剂在最终使用中比传统的非易燃制冷剂具有更高的火灾风险。本文介绍了几种常见的易燃易爆气体和非易燃易爆气体的热力循环压力、温度和效率- 比较了可燃制冷剂。用事件树说明了轻型商业和住宅应用的典型危险场景，讨论了危险阈值，并给出了一些预防措施。还介绍了通过案例研究和开展的研究项目获得的经验教训，并总结了使用易燃制冷剂时的建议。引用:2019年冬季会议，佐治亚州亚特兰大，会议论文

Flammable refrigerants are becoming more widely used in industrial, commercial (stationary and mobile), and residential applications as alternatives to conventional hydrofluorocarbon refrigerants. In addition to having low global warming potential and ozone depletion levels, HVAC&R systems utilizing these alternative refrigerants have demonstrated improved performance and energy efficiencies. However, despite these advantages, flammable refrigerants pose an increased fire risk over conventional non-flammable refrigerants in the end-use. In this paper, the thermodynamic cycle pressures, temperatures, and efficiencies of several common flammable and non-flammable refrigerants are compared. Typical hazard scenarios for light commercial and residential applications are illustrated with event trees, hazard thresholds are discussed, and some precautions are given. Lessons learned through case studies and conducted research projects are also presented and concluded with recommendations when working with flammable refrigerants.