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首页> 外文期刊>Journal of Pressure Vessel Technology >The Effect of Pressure Relief Valve Blowdown and Fire Conditions on the Thermo-Hydraulics Within a Pressure Vessel
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The Effect of Pressure Relief Valve Blowdown and Fire Conditions on the Thermo-Hydraulics Within a Pressure Vessel

机译：泄压阀排污和着火状况对压力容器内热工液压系统的影响

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In the summers of 2000 and 2001, a series of controlled fire tests were conducted on horizontal 1890 liter (500 US gallon) propane pressure vessels. The test vessels were instrumented with pressure transducers, liquid space, vapor space, and wall thermocouples, and an instrumented flow nozzle in place of a pressure relief valve (PRV). A computer controlled PRV was used to control pressure. The vessels were heated using high momentum, liquid propane utility torches. Open pool fires were not used for the testing because they are strongly affected by wind. These wind effects make it almost impossible to have repeatable test conditions. The fire conditions used were calibrated to give heat inputs similar to a luminous hydrocarbon pool fire with an effective blackbody temperature in the range of 850℃±50℃. PRV blowdown (i.e., blowdown = pop pressure-reclose pressure) and fire conditions were varied in this test series while all other input parameters were held constant. The fire conditions were varied by changing the number of burners applied to the vessel wall areas wetted by liquid and vapor. It was found that the vessel content's response and energy storage varied according to the fire conditions and the PRV operation. The location and quantity of the burners affected the thermal stratification within the liquid, and the liquid swelling (due to vapor generation in the liquid) at the liquid/vapor interface. The blowdown of the PRV affected the average vessel pressure, average liquid temperature, and time to temperature destratification in the liquid. Large blowdown also delayed thermal rupture.
机译：在2000年和2001年夏季，在水平1890升（500美国加仑）丙烷压力容器上进行了一系列的受控燃烧试验。测试容器装有压力传感器，液体空间，蒸气空间和壁热电偶，以及代替压力释放阀（PRV）的仪表化流量喷嘴。使用计算机控制的PRV来控制压力。使用高动量液态丙烷实用炬将容器加热。未将明池火用于测试，因为它们会受到风的强烈影响。这些风效应使得几乎不可能具有可重复的测试条件。所使用的着火条件经过校准，以提供与发光烃池着火相似的热量输入，有效黑体温度在850℃±50℃范围内。在此测试系列中，PRV排污（即，排污=爆破压力-重合压力）和着火条件发生了变化，而所有其他输入参数均保持不变。通过改变应用于液体和蒸气润湿的容器壁区域的燃烧器的数量来改变着火条件。结果发现，船内物品的反应和能量存储随着火情况和PRV操作而变化。燃烧器的位置和数量影响液体内的热分层，并影响液体/蒸气界面处的液体膨胀（由于液体中产生的蒸气）。 PRV的排污影响了平均容器压力，平均液体温度以及液体中温度分层的时间。大排污也延迟了热破裂。

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