非共沸混合工质压缩制冷循环的不可避免损失

Actual inevitable exergy loss in vapor-compression refrigeration cycle with non-azeotropic refrigerant mixtures

以非共沸混合工质替代 CFCS是比较有效的替代方案。通过对给定节点温差下的蒸发器和冷凝器内的温度匹配分析 ,提出利用调节非共沸混合工质的配比来优化蒸发器和冷凝器内的温度匹配 ,并可计算出循环的实际不可避免灯用损失 ,从而提出采用非共沸混合工质的蒸气压缩制冷循环的实际不可避免灯用损失的计算方法 ,并提出利用最佳配比和实际不可避免的灯用损失的计算 ,对各种非共沸混合工质对进行筛选 ,以进一步减少循环可避免的灯用损失 ,为优化蒸气压缩制冷循环 ,提高循环的性能奠定基础。

By analyzing the temperature curves in the evaporator and condenser under the condition of junction temperature differences, the temperature matching in the evaporator and/or condenser of actual vapor-compression refrigeration cycle was optimized using non-azeotropic refrigerant mixtures as the alternative to R12 and through the regulation of the proportion of the non-azeotropic refrigerant mixtures. A calculating method of the actual inevitable exergy loss in actual vapor-compression refrigeration cycle with the non-azeotropic refrigerant mixtures was proposed. The calculating method can be used in selecting of non-azeotropic refrigerant mixtures to minimize the avoidable exergy loss of the cycle so that the exergy efficiency can be improved.