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KOREA GAS SAFETY COPORATION

The Analysis of Fire Test for the High Pressure Composite Cylinder. 2011. 9. 14. . Chang Jong , Kim Seung Hoon , Lee Young Gyu , Kim. KOREA GAS SAFETY COPORATION. Contents. INTRODUCTION - Standard and Regulation of the Fire Test. EXPERIMENTS

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KOREA GAS SAFETY COPORATION

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  1. The Analysis of Fire Test for the High Pressure Composite Cylinder 2011. 9. 14. Chang Jong, Kim SeungHoon, Lee Young Gyu, Kim KOREA GAS SAFETY COPORATION

  2. Contents INTRODUCTION - Standard and Regulation of the Fire Test EXPERIMENTS - Procedures of the Fire Test / Results CONCLUSIONS - Discussion & Opinion

  3. INTRODUCTION

  4. About KGS [KOREA GAS SAFETY COPORATION] KGS Institute of Gas Safety R&D Project Establishing the Foundation of Overall Tests for High Pressure Cylinders and Components High pressure Cylinder Part Component Part • 2010 : preliminary fire test • 2011 : localized fire test Today’s topic

  5. Topic Korean Hydrogen cylinder regulation for hydrogen fuel-cell vehicle will be legislated in November 2011. Currently, researches for rule-making related testing procedures and safety confirmation is underway. Trend research and analysis of related standards such as UN ECE R 79, ISO/DS 15869, ECE GTR draft etc. Safety confirmation of cylinder explosion occurred by local fire is at issue(is important). The pool/local fire tests have different results depending on cylinder type. 1st test(completed) : pool fire test by cylinder type. 2nd test(scheduled) : local fire test by cylinder type(October-December 2011). Korean hydrogen cylinder regulation which reflects the test result will be legislated.

  6. Structure of the Fueling System STATION Under 1bar 10bar High pressure gas storage system

  7. Safety of the High-pressure Composite Cylinder How can we insure safety against fire?

  8. Development Trend of International Standard WG

  9. Standard and Regulation of the Fire Test (1) Success or Failure • after ignition, the temperature must be over 590 degrees centigrade within 5 minutes • gas must be released only through PRDs without burst

  10. Types of the Composite Cylinder

  11. Pool Fire Test [Germany] video file : Dynetek LTD. Germany

  12. Standard and Regulation of the Fire Test (2) • [fire test standard of the metal cylinder] ` SAE J2579 UN ECE R-79 ISO/DIS 15869 CGA C14 • ▶ Those standards and regulations were developed base on CGA C14. • ▶ They do not include properties of the composite cylinder. [ex] thermal conductivity <metal cylinder> <composite cylinder> TPRD TPRD heat heat Fire Fire

  13. Advanced Fire test standard by UN ECE WG29 In case of the high pressure hydrogen storage system for FCV, there is the possiblity of burst when fire occur locally(opposite TPRD) Purpose With considering about local fire, UN ECE WG29 has developed the advanced Fire-test method for FCV Concept : apply strong fire at the limited part of container (temperature should be 800℃ within 10 min.) Fire-test should be independent of external wind Localized fire 5 min.(at 600℃) / Full fire (at 800℃) Under “2)”condition, confirm whether a PRD works or not Condition & Form TPRD (solenoid valve) Fire TPRD (solenoid valve) Fire • localized fire 5 min.(at 600℃) & Full fire (at 800℃)

  14. EXPERIMENTS [Preliminary Fire Test ]

  15. Concept of the Fire Test Windbreak CNG cylinder Vent line • test location : The mouth of Mankyung river in KIMJE, Korea. • test date : Oct. 11~ 22. 2010 (2 weeks) • test cylindes : TypeⅡ cylinder 2EA, TypeⅢ cylinder 2EA, TypeⅣ cylinder 2EA • fire source : gasoline + kerosene • test regulation : ISO 15869, ANSI/NGV 2-2007 • TC sensors : located along the bottom of the cylinder 5EA, on cylinder 1EA, on valve 1EA • pressure sensor : 1EA

  16. Preparing Fire Test Windbreak 50 cm • ground was dug to about 50 centimeters • emergency vent line was installed • windbreak was installed TC5EA [bottom part] TC 1EA [valve] • TC1EA [top part] Vent Line Valve, PRD protector

  17. Procedures of the Fire Test (1) • ◆ Measurement DAQ(National Instrument) & Labview program ◆ Scene of test [TypeⅡ] [TypeⅢ] [TypeⅣ]

  18. Procedures of the Fire Test (2) • ◆ Fire Test Video VIDEO

  19. Fire-test results of cylinder (TypeⅡ) • Time to 10 bar (after ventilation) : 230 sec • Time to 590oC(Flame temp): 26 sec • PRD starting point: 76 sec

  20. Fire-test results of cylinder (TypeⅢ) • Time to 10 bar (after ventilation) : 192 sec • Time to 590 oC (Flame temp): 80 sec • PRD starting point: 100 sec

  21. Fire-test results of cylinder (TypeⅣ) • Time to 10 bar (after ventilation) : 225 sec • Time to 590oC (Flame temp): 58 sec • PRD starting point: 131 sec

  22. Fire-test results of cylinder (TypeⅡ,Ⅲ,Ⅳ) [TypeⅡ] [TypeⅢ] [TypeⅣ] • TypeⅡ & TypeⅢ cylinder : the upward tendency of pressure • TypeⅣ : no change In short, change of pressure inner cylindersdepend on amount of heat conduction because materials of liner are different.

  23. Summary of Fire Test Results The PRD venting time TypeⅡ TypeⅢ TypeⅣ Longer Longer Change of pressure (bar) • TypeⅡ : small change  PRD venting time is the shortest • TypeⅢ > Type Ⅳ difference of Heat delivery

  24. CONCLUSIONS

  25. Summary • The present regulation and standard of fire test for the composite cylinder • no consideration about various types[materials] of cylinder • no method to confirm safety of the composite cylinder against localized fire • The advanced regulation and standard of fire test for the composite cylinder • include properties of various types[materials] of cylinder • add a test method to confirm safety of the composite cylinder against localized fire • [EX] composite cylinder TPRD TPRD

  26. KGS go ahead with a plan • Safety confirmation of cylinder explosion occurred by local fire is important. • The pool/local fire tests have different results depending on cylinder type. KGS will analysis continuously about trend research and analysis of related International standards. Continuously, researches for rule-making related testing procedures and safety confirmation is stepping up. 2nd test(scheduled) : local fire test by cylinder type(October-December 2011). Korean hydrogen cylinder regulation which reflects the test result will be legislated.

  27. Plan of Localized Fire Test • Concept of fire test Protective wall Vent line LPG line 350bar or 700bar Hydrogen

  28. Thank you!! kimcj2009@kgs.or.kr

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