| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat transfer composition which has a low GWP, and has capacity and energy efficiency (shown for convenience as a "coefficient of performance") of at most 20% ideally of a value attained using existing refrigerants (for example, 134a, R-152a or the like), of at most 10% preferably or less than that (for example about 5%) of these values, and which is usable in itself or suitable as an alternative of existing cooling usage. <P>SOLUTION: The heat transfer composition comprises R-1234ze (E), R-32, and 1,1,1,2-tetrafluoroethane (R-134a). The heat transfer composition preferably comprises about 4-16 wt.% of R-32, about 10-50 wt.% of R-134a, and about 35-90 wt.% of R-1234ze (E). <P>COPYRIGHT: (C)2011,JPO&INPIT |
