海洋复合保温软管保温性能实验

天津市海王星海上工程技术股份有限公司, 天津 300384

Neptune Offshore Engineering Development Co. Ltd., Tianjin, 300384

介绍了某海洋复合保温软管的结构形式,并推导出理论传热系数的计算方法。根据规范设计了稳态和瞬态两种保温性能实验方案,分别对该复合保温软管进行测试,并对实验数据进行处理分析。通过对理论值与实验值进行对比,发现瞬态实验所得传热系数要小于稳态实验的所得值,稳态实验方案测得的传热系数更加接近于理论值。对比两种实验方案的优缺点可知,采用稳态实验方案获得的数据更加准确可靠。对稳态实验方案得到的实验数据较理论计算值偏小的原因进行了分析,认为理论计算时忽略了夹杂在软管结构内空气的保温效果,是造成理论值大于实验值的主要原因。

This paper introduces the structural style of a marine laminated insulation flexible pipe, and derives the computational method of theoretical heat transfer coefficient. To test the insulating property of the flexible pipe, two experimental programs for insulating property in steady state and transient state were designed as per relevant specifications, and are used respectively to test the laminated insulation flexible pipe. The data measured in the experiments were recorded in detail and processed and analyzed accurately. It is discovered through correlation of theoretical value and experimental value that the heat transfer coefficient obtained from experiment in transient state is lower than that from experiment in steady state, and the heat transfer coefficient measured from the later experiment is closer to the theoretical value. The comparison of these two experimental programs shows that the data obtained from the steady-state experiment program is more accurate and reliable. Furthermore, the causes for the lower experimental data obtained than the theoretical calculated value were analyzed, suggesting that the negligence of insulation effect of air occluded in the flexible pipe architecture at the time of theoretical calculation is the leading cause.