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《Journal of Zhejiang University(Engineering Science)》 2007-12
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Study on influence of test methods for determining explosion limits of flammable refrigerants

CHEN Guang-ming,WANG Hai-ying,WANG Qin,ZHANG Rui(Institute of Refrigeration and Cryogenics,Zhejiang University,Hangzhou 310027,China)  
Two test devices were established according to GB/T 12474-90 and ASTM E681-01 respectively,and the difference between the explosion limits of flammable refrigerants tested by these two devices were analyzed and compared according to experimental phenomena and combustion theory.For a cylindrical vessel of small diameter,the explosion limit is affected by the wall's quenching effect.For a ASTM type 12 L spherical flask,the quenching effect is weak and the experimental values of explosion limits may approach to the values obtained in free space.The electrode material,shape and the spaces between the electrodes of the ASTM type spherical flask have effect on spark ignition energy.Using the ASTM type spherical flask can obtain reliable explosion limit data to confirm the security of refrigerants use.
【CateGory Index】: TB64
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