论文部分内容阅读
制冷剂R444B是霍尼韦尔最新开发的、可作为高温气候区域家用空调制冷剂R22的替代制冷剂。R444B的ODP(臭氧消耗潜能值)为零,GWP(全球变暖潜能值)仅为295;相对于R22,GWP减少85%。理论制冷循环分析表明,R444B的制冷量和COP(性能系数)在高温工况下与R22相当。分体式空调实验结果显示:在高温气候区域的T3和T3Max工况下,R444B的制冷量和COP与R22相当,略高于R407C;R444B的排气温度与R22相当;R444B换热器压降也小于R22;R444B制冷剂流量约为R22的80%。通过优化室内机管路连接方式,优化后R444B空调制冷量和COP相对于原型提升0.3%~1.0%。R444B的制冷量和COP随高温环境衰变速率与R22相当,优于R407C。
Refrigerant R444B is Honeywell’s latest development and is intended as an alternative refrigerant for residential air conditioning refrigerant R22 in hot climates. R444B has zero ODP (ODP) and GWP (global warming potential) of only 295; a reduction of 85% in GWP relative to R22. The theoretical refrigeration cycle analysis shows that the cooling capacity and COP (coefficient of performance) of R444B are equivalent to R22 at high temperature. The results of split-type air-conditioning experiment show that the cooling capacity and COP of R444B are equivalent to R22 and slightly higher than R407C in the T3 and T3Max operating conditions in high-temperature climatic zone; the exhaust temperature of R444B is equivalent to R22; the pressure drop of R444B heat exchanger Less than R22; R444B refrigerant flow rate is about 80% of R22. By optimizing the connection of indoor unit pipelines, the optimized R444B air-conditioning cooling capacity and COP increase 0.3% ~ 1.0% relative to the prototype. R444B cooling capacity and COP decay rate with the high temperature environment and R22 rather better than R407C.