| 摘要 |
PROBLEM TO BE SOLVED: To provide a working fluid that exhibits low ODP and GWP and provides excellent thermal performance in middle and high temperature ranges, particularly in the middle-high condensation temperature range of 70°C to 100°C or at the high condensation temperature range greater than 100°C.SOLUTION: A heat transfer composition comprises: about 60 wt.% to about 95 wt.% of a first composition selected from the group consisting of HFO-1233zd, HFC-245fa, and combinations of these; and about 5 wt.% to about 40 wt.% of a second composition selected from the group consisting of HFO-1234ze, HFC-134a, and combinations of these. The composition has one or more of the following: (1) a capacity between about 90% and about 110% relative to CFC-114 in a high temperature heat pump system; (2) a COP of at least about 95% relative to CFC-114 in a high temperature heat pump system; or (3) a glide of less than about 3°C in a high temperature heat pump system. |
