Abstract The design of thermal insulation system is crucial for the LNG cargo containment system (CCS). In this paper, a heat transfer model for a 40 m3 independent type B mock-up tank was proposed. A cryogenic test platform was built and the liquid nitrogen boil off rate (BOR) of the mock-up tank was simulated and tested. Consistency between simulation results and test results verified the accuracy of the heat transfer model. In the following, to predict the LNG BOR of the mock up tank under International Gas Code (IGC) conditions, several influence factors were taken into consideration and reasonable conversions were made. It was found that the test evaporation rate is 1.82%/day, the conversed BOR of new independent type B LNG mock-up tank is 1.27%/day and they are in good agreement with the simulations.

中文翻译：

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新型独立B型LNG模拟罐日蒸发率测试及换算方法

摘要 保温系统的设计对于LNG货物围护系统（CCS）至关重要。在本文中，提出了一个 40 m3 独立 B 型模型罐的传热模型。搭建了低温试验平台，对模型罐的液氮蒸发率（BOR）进行了模拟测试。仿真结果与测试结果的一致性验证了传热模型的准确性。下面，为预测国际气体规范（IGC）条件下模拟罐的LNG BOR，综合考虑了几个影响因素并进行了合理的换算。结果表明，试验蒸发率为1.82%/天，新型独立B型LNG模拟罐的换算BOR为1.27%/天，与模拟结果吻合较好。