Through experimental methods,obtain the actual per-formance of automatic sprinkler fire extinguishing systems under three simulated failure conditions,analyze and compare the ex-pected fire extinguishing effectiveness under the system design conditions,and summarize the impact of different failure condi-tions on fire extinguishing effectiveness.The experimental results show:the sprinkler deflector failure will cause uneven water distri-bution and less effective control of early stage fire,so that the number of actuated sprinklers will increase to meet the fire control requirements,and the failure can result in about 40％reduction in fire extinguishing efficiency.The malfunction of the thermal sensi-tive element will lead to higher sprinkler operation temperature and longer response time,during which the fire develops too rap-idly to be effectively controlled in the short term after the sprin-kler actuation,and the malfunction can result in about 25％reduc-tion in fire extinguishing efficiency.Furthermore insufficient work-ing pressure will cause the most serious impact,which reduces the fire extinguishing efficiency by about 60％.
维普
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