USE OF COMPOSITIONS COMPRISING 1,1,1,2,3-PENTAFLUOROPROPANE AND OPTIONALLY Z-1,1,1,4,4,4-HEXAFLUORO-2-BUTENE IN CHILLERS
A method is provided for producing cooling in a chiller having an evaporator wherein a refrigerant composition is evaporated to cool a heat transfer medium. The method comprises evaporating a refrigerant composition comprising HFC-245eb and optionally Z—HFO-1336mzz in the evaporator. Additionally, a composition is provided comprising: (1) a refrigerant composition consisting essentially of HFC-245eb and Z—HFO-1336mzz; (2) a lubricant suitable for use in a chiller; wherein the Z—HFO-1336mzz in the refrigerant composition is at least about 41 weight percent. Also, a chiller apparatus is provided comprising an evaporator, a compressor, a condenser and a pressure reduction device, all of which are in fluid communication in the order listed and through which a refrigerant flows from one component to the next in a repeating cycle.
1 . A method for producing cooling in a chiller having an evaporator wherein a refrigerant composition is evaporated to cool a heat transfer medium and the cooled heat transfer medium is transported out of the evaporator to a body to be cooled, wherein the method comprising: evaporating a refrigerant composition comprising HFC-245eb and optionally Z—HFO-1336mzz in the evaporator.
2 . The method of claim 1 , wherein said step of evaporating the composition produces a vapor composition, and further comprising the step of compressing the vapor composition in a compressor, wherein the compressor is a centrifugal compressor.
3 . The method of claim 1 wherein the evaporator is suitable for use with HCFC-123 and wherein the refrigerant composition consists essentially of from about 1 weight percent to about 59 weight percent HFC-245eb and from about 41 weight percent to about 99 weight percent Z—HFO-1336mzz.
4 . The method of claim 1 wherein the chiller is suitable for use with HCFC-123 and wherein the refrigerant composition consists essentially of from about 1 weight percent to about 29 weight percent HFC-245eb and from about 71 weight percent to about 99 weight percent Z—HFO-1336mzz.
5 . The method of claim 1 wherein the chiller is suitable for use with CFC-11 and wherein the refrigerant composition consists essentially of from about 1 weight percent to about 59 weight percent HFC-245eb and from about 41 weight percent to about 99 weight percent Z—HFO-1336mzz.
6 . The method of claim 1 wherein the refrigerant composition consists essentially of HFC-245eb.
7 . The method of claim 1 wherein the refrigerant composition consists essentially of HFC-245eb and Z—HFO-1336mzz; and wherein the Z—HFO-1336mzz in the refrigerant composition is at least about 1 weight percent.
8 . The method of claim 7 wherein the refrigerant composition consists essentially of from about 99 weight percent to about 43 weight percent HFC-245eb and from about 1 weight percent to about 57 weight percent Z—HFO-1336mzz.
9 . The method of claim 7 wherein the refrigerant composition consists essentially of from about 1 weight percent to about 18 weight percent HFC-245eb and from about 82 weight percent to about 99 weight percent Z—HFO-1336mzz.
10 . A composition comprising: (1) a refrigerant composition consisting essentially of HFC-245eb and Z—HFO-1336mzz; (2) a lubricant suitable for use in a chiller; wherein the Z—HFO-1336mzz in the refrigerant composition is at least about 41 weight percent.
11 . The composition of claim 10 wherein the refrigerant composition consists essentially of from about 1 weight percent to about 59 weight percent HFC-245eb and from about 41 weight percent to about 99 weight percent Z—HFO-1336mzz.
12 . A chiller apparatus containing a refrigerant composition, characterized by:
said refrigerant composition comprising HFC-245eb and optionally Z—HFO-1336mzz.
13 . The chiller apparatus of claim 12 comprising (a) an evaporator through which a refrigerant flows and is evaporated; (b) a compressor in fluid communication with the evaporator that compresses the evaporated refrigerant to a higher pressure; (c) a condenser in fluid communication with the compressor through which the high pressure refrigerant vapor flows and is condensed; and (d) a pressure reduction device in fluid communication with the condenser wherein the pressure of the condensed refrigerant is reduced and said pressure reduction device further being in fluid communication with the evaporator such that the refrigerant then repeats flow through components (a), (b), (c) and (d) in a repeating cycle.