Advances In Green Hose Technology

Transcription

1 Advances In Green Hose Technology R-1234yf A/C Hose Design and Compatibility Aaron D. Clark M.S Eaton Corp Eaton. All Rights Reserved..

2 Agenda Refrigerant Background Material Testing Thermal Capability Chemical Compatibility Hose Testing- Permeation Coupling Integrity Conclusions Questions 2 2

3 New Hose Constructs Commitment to the Environment Eaton defines Sustainability as meeting the current needs of our society in ways that enable future generations R-1234yf and next generation refrigerants are designed to reduce GWP New hose technology and new hose constructs further support the reduction in emissions of Greenhouse gasses 3 3

4 R-1234yf Refrigerant Background Invented and produced by Atmospheric breakdown products are the same as for R-134a Low toxicity similar to R-134a Thermally stable and compatible with R-134a components Potentially a direct substitute for R-134a! 4 4

5 New Hose Constructs Commitment to the Environment Will R-1234yf be the only refrigerant serving the Heavy Duty Sector? There will be no retrofit program for R-134a meaning the refrigerant will remain in the market for a number of years. Large bus has selected R-407C as the refrigerant of choice for many markets R-410 is being used by APU s and in some food apps. R-404a is often used for frozen food. The next generation of hose must be a construct that satisfies the collective needs of the global market. 5 5

6 Air Conditioning Hoses Desired properties of an AC hose Good solvent compatibility Low permeation Good coupling integrity Adequate pressure rating Thermal stability Flexibility 6 6

7 Comparison Of Barrier And Veneer Hose Construction Multilayer Veneer Design Type E Braid Plastic Elastomeric Elastomeric Veneer Layer Cover Multilayer Barrier Design Type C Braid Braid Elastomeric Tube Plastic Barrier Elastomeric Layer Elastomeric Cover 7 7

8 Tube Aging Properties in HFO-1234yf (Slide from 2012 Presentation) 8 8

9 New Eaton, SAE J2064 Type E New Dual Extrusion Tube First layer Thermoplastic offering the same excellent oil and refrigerant compatibility of existing veneer hoses Second layer bonded to the first, offers near Zero effusion The two layers are bonded so tightly, that explosive decompression testing has virtually no effect. Patent is pending on this technology. FQ Testing is currently underway in Maumee New Technology Dual Extruded Tube Backing Layer Insulation Poly Braid Rubber Cover 9 9

10 Veneer Oil & Refrigerant Compatibility Zerol HD46 (Shrieve) PAG oil has proprietary technology designed for stability in R-1234yf systems Other compressor oils aren t recommended due to poor miscibility with R-1234yf 10 10

11 New Eaon Veneer Oil & Refrigerant Compatibility Testing performed according to ASTM D471 (2 weeks at 125 C) 11 11

12 Temperature Stability of Materials 12 12

13 High Temperature Capability 13 13

14 Low Temperature Capability Testing according to ASTM D

15 Factors Influencing Permeation Increased Permeation Decreased Permeation 15 15

16 R-134a 90 C Testing according to SAE J

17 R-1234yf Permeation Testing Results SAE J2064 Zero degradation Zero cracking or blistering Zero loss of adhesion 17 17

18 Refrigerant Type vs. New Eaton Hose Size 18 18

19 New Eaton Hose Fittings The new Eaton AC hose will use the same fittings as the current Eaton hose. Fully qualified with E-Z Clip Connector System Fully qualified with Eaton Factory Crimp System 19 19

20 New Eaton Hose Coupling Integrity Testing With R-1234yf 20 20

21 Flexibility and Kink Resistance Competitor Type E vs. Eaton Type E Competitor Barrier vs. Eaton Type E 21 21

22 Conclusions The new Eaton hose has: The lowest permeation of any Type E mobile hose type in the market The largest temperature range (-40 C to +140 C) of any air conditioning hose designed for a mobile application Passed formal qualification for R-134a and R-1234yf refrigerants Passed formal qualification with E-Z Clip connector system and the Eaton factory crimp system Initiated qualification using R407C, R410 and R404a refrigerants A bend radius comparable to the current Eaton hose with improved kink resistance 22 22

23 Citations 1. The Greenhouse Effect ; Millennium Energy Solution; D.P Wilson and M. Koban; HFO-1234yf, Industry Update ; Honeywell and DuPont; EPA commercialization Meeting; Industry Evaluation of the Low Global Warming Potential Refrigerant HFO1234yf ; SAE International: SAE CRP1234; J. E Mark; Hansen Solubility Parameters of Representative Polymers ; Physical Properties of Polymers Handbook; ; H. Zhang and A. Cloud; The Permeability Characteristics of Silicon Rubber ; Arlon Silicone Technologies; Society for the Advancement of Material and Process Engineering; DuPont HFC-134a, Properties, Uses, Storage and Handling ; DuPont Technical Information; C. J. Cornelius; Physical and Gas Permeation Properties of a Series of Novel Hybrid Inorganic- Organic Composites Based on a Synthesized Fluorinated Polyimide ; Dissertation Virginia Tech; K. Inoue, M. Sunami and A. Nakao; Mutual Solubility of Refrigerants and Polyol Esters ; International Refrigeration and Air Conditioning Conference; W.M Lee; Selection of Barrier Materials from Molecular Structure ; DOW Chemical ; Polymer Engineering and Science; 65-69; R.Y Huang and V.J Lin, Separation of Liquid Mixtures by Using Polymer Membranes. I. Permeation of Binary Organic Liquid Mixtures through Polyethylene ; JOURNAL OF APPLIED POLYMER SCIENCE VOL. 12, PP ;

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26 Low Temperature Capability Cold Flex Heat 26 26