| 摘要 |
The invention provides a heat transfer composition comprising (i) a first component selected from trans-1, 3,3,3-tetrafluoropropene (R-1234ze(E)), cis-1, 3,3,3- tetrafluoropropene (R-1234ze(Z)) and mixtures thereof; (ii) carbon dioxide (R-744); and (iii) a third component selected from 1,1,1-trifluoropropane (R-263fb), 1,1,1,2,3- pentafluoropropane (R-245eb), ammonia (R-717) and mixtures thereof. |
