Research On The Fire Risk Assessment And Simulation Of Generator Room In The Offshore Oil Platform

In the process of marine resource exploration and development of,due to the poor marine environment together with high risk and high operation cost,the offshore oil platform is rapidly becoming the major option of offshore oil industry because of its economic feasibility and applicability to against harsh environmental risks.However,because of its structure compactness together with huge workload and complicated systems,oil & gas leakage and fire & explosion are ranking the most likelihood amongst the accidents.The consequence of the incident is especially high on the platform of the generator room for not only the diesel or crude oil as the fuel,but the temperature is very high nearby the exhaust pipe.The temperature sometimes is even up to 400?,as if the fuel leakage occurred near the generator exhaust pipe,the overall generator rooms might caught fire,which further leading to fire and explosion of the offshore oil and platform.In the paper,the generator room of an 8-legged offshore oil platform installed in the eastern region of South China Sea is taken as the research object,and the main contents are as per following:Firstly,through the comparative analysis on the methodology various fire risk analysis,the author find out that the Fault Tree Analysis and Brainstorming Method are applicable to identify the various key elements affecting the fire loss of the generator room.The overall factors may be classified into target,and guideline and impact layers to build up the fire risk assessment system of the generator room which may cover 3 layers with 6 categories and 34 influential factors.Secondly,with the analytic hierarchy process,the weightings of each criterion layer and influence factor layer are then carefully quantified and determined.It is found that the inflammable substances in the generator room are the most important factors and then the fuel leakage of the generator is the maximum weighting factor of all the influential factors.With the fuzzy evaluation method to evaluate the fire risk of the whole generator room,the result shows that the fire risk of the generator room is 3.165 which is close to the general safety analysis result based on the definition of the quantification table of risk level.The flue exhaust pipe in the motor room turns to be the highest fire risk factor with a fire risk value of 2.5714.Thirdly,based on the analysis of fire simulation software and simulation method,a FDS software for fire simulation has been adopted to simulate the research object and therefore the flue exhaust pipe of generator shall be most likely fire ignition source.Combined with the actual situation of the oil platform generator room in South China Sea,the generator room simulation model has been built and the changes of various factors such as heat radiation,flue gas and temperature in the case of fire of the generator room have been investigated to find out the inherent law of the fire in the generator room with respect to time and limited space during various risk factors activated.It is then concluded that the best escape time is 17 s after the fire broke out in the generator room,and then the fire may spread rapidly from the fire source to the escape stairway.This may provide the theoretical basis and technical support for the follow-up safety management,emergency drills and design of the offshore oil platform for long run.