Composition comprising cis-1,1,1,4,4,4-hexafluoro-2-butene and trans-1,2-dichloroethylene, apparatus containing same and methods of producing cooling therein
View Patent ↗A chiller apparatus containing a composition comprising cis-1,1,1,4,4,4-hexafluoro-2-butene and trans-1,2-dichloroethylene.
1. A chiller apparatus containing a composition consisting of cis-1,1,1,4,4,4-hexafluoro-2-butene and trans-1,2-dichloroethylene; wherein said chiller comprises a centrifugal compressor and is suitable for use with HCFC-123; and wherein said composition consists of from about 67 weight percent to about 87 weight percent cis-1,1,1,4,4,4-hexafluoro-2-butene and from about 33 weight percent to about 13 weight percent trans-1,2-dichloroethylene.
2. The chiller apparatus of claim 1 wherein said chiller is a flooded evaporator chiller.
3. The chiller apparatus of claim 1 wherein said chiller is a direct expansion chiller.
4. The apparatus of claim 1 , wherein the centrifugal compressor comprises an impeller and the impeller tip speed is within 10% of that for HCFC-123.
5. The apparatus of claim 4 , wherein the impeller tip speed is within 5% of that for HCFC-123.
6. The apparatus of claim 4 , wherein the composition is non-flammable, provides cooling capacity in said chiller within 10% of the cooling capacity for HCFC-123, and an average temperature glide of less than 1 K.
7. The apparatus of claim 1 , wherein the composition provides cooling capacity in said chiller within 10% of the cooling capacity for HCFC-123.
8. A method for producing cooling comprising evaporating a composition comprising cis-1,1,1,4,4,4-hexafluoro-2-butene and trans-1,2-dichloroethylene in an evaporator in the vicinity of a body to be cooled, thereby producing cooling; wherein said cooling is produced by a chiller having a centrifugal compressor and said chiller is suitable for use with HCFC-123; and wherein said composition consists of from about 67 weight percent to about 87 weight percent cis-1,1,1,4,4,4-hexafluoro-2-butene and from about 33 weight percent to about 13 weight percent trans-1,2-dichloroethylene.
9. The method of claim 8 , further comprising the step of passing a cooling medium through the evaporator, wherein the evaporation step cools the cooling medium, and passing the cooling medium out of the evaporator to the body to be cooled.
10. A method for replacing HCFC-123 or CFC-11 refrigerant in a chiller, said method comprising providing a composition consisting of cis-1,1,1,4,4,4-hexafluoro-2-butene and trans-1,2-dichloroethylene to said chiller in place of said refrigerant; wherein said chiller comprises a centrifugal compressor; and wherein said composition consists of from about 67 weight percent to about 87 weight percent cis-1,1,1,4,4,4-hexafluoro-2-butene and from about 33 weight percent to about 13 weight percent trans-1,2-dichloroethylene.
11. The method of claim 10 , wherein the centrifugal compressor has an impeller, and said method further comprises increasing the rotational speed of the impeller.
12. The method of claim 10 , wherein the centrifugal compressor has an impeller, and said method further comprises replacing the compressor impeller with a larger diameter impeller.
13. A chiller apparatus containing a composition consisting of cis-1,1,1,4,4,4-hexafluoro-2-butene and trans-1,2-dichloroethylene; wherein said chiller comprises a centrifugal compressor and is suitable for use with HCFC-123; and wherein said composition consists of about 74.7 weight percent cis-1,1,1,4,4,4-hexafluoro-2-butene and about 25.3 weight percent trans-1,2-dichloroethylene.
14. A method for producing cooling comprising evaporating a composition comprising cis-1,1,1,4,4,4-hexafluoro-2-butene and trans-1,2-dichloroethylene in an evaporator in the vicinity of a body to be cooled, thereby producing cooling; wherein said cooling is produced by a chiller having a centrifugal compressor and said chiller is suitable for use with HCFC-123; and wherein said composition consists of about 74.7 weight percent cis-1,1,1,4,4,4-hexafluoro-2-butene and about 25.3 weight percent trans-1,2-dichloroethylene.
15. A method for replacing HCFC-123 or CFC-11 refrigerant in a chiller, said method comprising providing a composition consisting of cis-1,1,1,4,4,4-hexafluoro-2-butene and trans-1,2-dichloroethylene to said chiller in place of said refrigerant; wherein said chiller comprises a centrifugal compressor; and wherein said composition consists of about 74.7 weight percent cis-1,1,1,4,4,4-hexafluoro-2-butene and about 25.3 weight percent trans-1,2-dichloroethylene.