| 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 propylene (R-1270), propane (R-290), n-butane (R- 600), isobutane (R-600a), and mixtures thereof. |
