Method for circulating selected heat transfer fluids through a closed loop cycle

Abstract

The present invention relates to the use of flexible hoses capable of handling high pressure fluids and providing a barrier against permeation loss in air conditioning and refrigeration systems. Such hoses are particularly suitable in air conditioning and refrigeration in which new, low global warming potential refrigerant alternatives are used.

1 . A method of providing transport of a heat transfer fluid composition within a refrigeration or air conditioning system, comprising circulating a heat transfer fluid through one or more hoses of said system, wherein said heat transfer fluid composition comprises a compound selected from the group consisting of: R32, R152a, CF 3 I, 1234yf, 1225ye and trans-1234ze. 
   
   
       2 . The method of  claim 1 , wherein the method comprises the steps of circulating the heat transfer fluid composition from a hose connected between the outlet of a compressor and the inlet of a condenser. 
   
   
       3 . The method of  claim 2 , further comprising the step of circulating the heat transfer fluid composition through a hose connected between an outlet of the condenser and an inlet of an evaporator. 
   
   
       4 . The method of  claim 3 , further comprising the step of circulating the heat transfer fluid composition through a hose connected between an outlet of the evaporator and an inlet of the compressor. 
   
   
       5 . The method of  claim 3 , wherein the hose comprises an outer layer comprising a material selected from the group consisting of an elastomer and a polyamide and an inner layer comprising a material selected from the group consisting of an elastomer, a polyamide and a thermoplastic. 
   
   
       6 . The method of  claim 5 , wherein the inner layer comprises a thermoplastic veneer and the outer layer comprises an elastomer. 
   
   
       7 . The method of  claim 6 , further including:
 (a) a tie layer positioned over said inner layer;   (b) a metal-polymer laminate positioned over said tie layer and consisting of a layer of polymer compatible with or bondable to said outer surface of said veneer, a thin layer of metallic foil, and another layer of a polymer protecting the metallic foil;   (c) a braid under-layer positioned over said metal-polymer laminate and consisting of an elastomeric material; and   (d) a reinforcing braid layer positioned over said braid under-layer, wherein the outer layer is positioned on the outside of the reinforcing braid layer.   
   
   
       8 . The method of  claim 7 , further comprising one or more additional reinforcing braid layers (d) and/or one or more additional outer layers. 
   
   
       9 . The method of  claim 1 , wherein the heat transfer fluid composition comprises HFC-1225ye and at least one additional compound selected from the group consisting of HFC-1234ze, HFC-1234yf, HFC-1234ye, HFC-1243zf, HFC-32, HFC-125, HFC-134, HFC-134a, HFC-143a, HFC-152a, HFC-161, HFC-227ea, HFC-236ea, HFC-236fa, HFC-245fa, HFC-365mfc, propane, n-butane, isobutane, 2-methylbutane, n-pentane, cyclopentane, dimethylether, CF 3 SCF 3 , CO 2 , NH 3 , and CF 3 I. 
   
   
       10 . The method of  claim 1 , wherein the heat transfer fluid composition comprises HFC-1234ze and at least one additional compound selected from the group consisting of HFC-1234yf, HFC-1234ye, HFC-1243zf, HFC-32, HFC-125, HFC-134, HFC-134a, HFC-143a, HFC-152a, HFC-161, HFC-227ea, HFC-236ea, HFC-236fa, HFC-245fa, HFC-365mfc, propane, n-butane, isobutane, 2-methylbutane, n-pentane, cyclopentane, dimethylether, CF 3 SCF 3 , CO 2  and CF 3 I. 
   
   
       11 . The method of  claim 1 , wherein the heat transfer fluid composition comprises HFC-1234yf and at least one additional compound selected from the group consisting of HFC-1234ye, HFC-1243zf, HFC-32, HFC-125, HFC-134, HFC-134a, HFC-143a, HFC-152a, HFC-161, HFC-227ea, HFC-236ea, HFC-236fa, HFC-245fa, HFC-365mfc, propane, n-butane, isobutane, 2-methylbutane, n-pentane, cyclopentane, dimethylether, CF 3 SCF 3 , CO 2 , NH 3 , and CF 3 I. 
   
   
       12 . The method of  claim 1 , wherein the heat transfer fluid composition comprises HFC-1243zf and at least one additional compound selected from the group consisting of HFC-1234ye, HFC-32, HFC-125, HFC-134, HFC-134a, HFC-143a, HFC-152a, HFC-161, HFC-227ea, HFC-236ea, HFC-236fa, HFC-245fa, HFC-365mfc, propane, n-butane, isobutane, 2-methylbutane, n-pentane, cyclopentane, dimethylether, CF 3 SCF 3 , CO 2  and CF 3 I. 
   
   
       13 . The method of  claim 1 , wherein the heat transfer fluid composition comprises HFC-1234ye and at least one additional compound selected from the group consisting of HFC-1243zf, HFC-32, HFC-125, HFC-134, HFC-134a, HFC-143a, HFC-152a, HFC-161, HFC-227ea, HFC-236ea, HFC-236fa, HFC-245fa, HFC-365mfc, propane, n-butane, isobutane, 2-methylbutane, n-pentane, cyclopentane, dimethylether, CF 3 SCF 3 , CO 2  and CF 3 I.