NONFLAMMABLE REFRIGERANTS HAVING LOW GWP, AND SYSTEMS FOR AND METHODS OF PROVIDING REFRIGERATION
The present invention provides a refrigerant composition comprising: (a) from about 65% by weight to about 90% by weight of HFO-1234ze (E); (b) from about 10% by weight to about 35% by weight of HFO-1336mzz (E); and optionally (c) from about 0% to about 4.4% by weight of HFC-227ea for use in a variety of refrigeration applications, including air conditioning and/or refrigeration and particularly cooling products such as fruits, vegetables and beverages without exposing those articles to temperatures below the freezing point of water.
1 . A heat transfer system comprising:
(a) an evaporator; and
(b) and a refrigerant in the evaporator, said refrigerant comprising:
(i) from about 65% by weight to about 90% by weight of HFO-1234ze (E); and
(ii) from about 10% by weight to about 35% by weight of HFO-1336mzz (E).
2 . The heat transfer system of claim 1 wherein said refrigerant consists essentially of said HFO-1234ze (E) and said HFO-1336mzz (E).
3 . The heat transfer system of claim 1 wherein said refrigerant consists of said HFO-1234ze (E) and said HFO-1336mzz (E).
4 . The heat transfer system of claim 1 wherein said refrigerant consists of from about 65% to about 78% by weight of HFO-1234ze (E) and from about 22% to about 35% by weight of said HFO-1336mzz (E).
5 . The heat transfer system of claim 1 wherein said refrigerant further comprises from greater than 0 to about 4.4% by weight of HFC-227ea.
6 . The heat transfer system of claim 5 wherein said refrigerant consists essentially of said HFO-1234ze (E), said HFO-1336mzz (E) and said HFC-227ea.
7 . The heat transfer system of claim 1 wherein said refrigerant consists of from about 74.6 to about 78.6% by weight of HFO-1234ze (E), from about 17% to about 21% by weight of said HFO-1336mzz (E) and about 4.4% by weight of HFC-227ea.
8 . A refrigerant comprising:
(a) from about 74.6 to about 78.6% by weight of HFO-1234ze (E); and
(b) from about 17% to about 21% by weight of said HFO-1336mzz (E).
9 . The refrigerant of claim 8 consisting essentially of: (a) about 78.6% by weight of HFO-1234ze (E); (b) about 17% by weight of HFO-1336mzz (E); and (c) about 4.4% by weight of HFC-227ea.
10 . The refrigerant of claim 8 consisting essentially of: (a) about 76.6% by weight of HFO-1234ze (E); (b) about 19% by weight of HFO-1336mzz (E); and (c) about 4.4% by weight of HFC-227ea.
11 . The refrigerant of claim 8 consisting essentially of: (a) about 74.6% by weight of HFO-1234ze (E); (b) about 21% by weight of HFO-1336mzz (E); and (c) about 4.4% by weight of HFC-227ea.
12 . The refrigerant of claim 9 consisting of HFO-1234ze (E); HFO-1336mzz (E) and HFC-227ea.
13 . The refrigerant of claim 10 consisting of HFO-1234ze (E); HFO-1336mzz (E) and HFC-227ea.
14 . The refrigerant of claim 11 consisting of HFO-1234ze (E); HFO-1336mzz (E) and HFC-227ea.
15 . The refrigerant of claim 8 consisting essentially of: (a) 78.6% +0.5%/−2.0% by weight of HFO-1234ze (E); (b) 17% +2.0%/−0.5% by weight of HFO-1336mzz (E); and (c) about 4.4% +2.0%/−0.5% by weight of HFC-227ea.
16 . The refrigerant of claim 8 consisting essentially of: (a) 76.6% +0.5%/−2.0% by weight of HFO-1234ze (E); (b) 19% +2.0%/−0.5% by weight of HFO-1336mzz (E); and (c) about 4.4% +2.0%/−0.5% by weight of HFC-227ea.
17 . The refrigerant of claim 8 consisting essentially of: (a) 74.6% +0.5%/−2.0% by weight of HFO-1234ze (E); (b) 21% +2.0%/−0.5% by weight of HFO-1336mzz (E); and (c) about 4.4% +2.0%/−0.5% by weight of HFC-227ea.
18 . A heat transfer system comprising a refrigerant according to claim 12 .
19 . The heat transfer system of claim 18 comprising a chiller system.
20 . The heat transfer system of claim 18 comprising a medium temperature refrigeration system.