Test Description for ECSP LH2 Tank Pressure Drop Tests

Abstract

The DLR Bremen offers the performance of draining tests with a tank model of an A5ME LH2 acryl glass tank with 1/5 scale [1]. Deionized water will be used as test liquid. The tank model is equipped additionally with a draining feed line at the bottom. Tank model and draining system is delivered by EuroCryoSpace. The aim is to estimate the draining behavior and the detection of critical gas suction into the feedline. Furthermore the validation of the geometrical residual and the pressure drop regarding the U/S requirements. [2] [3] The pressure drop tests are done after the LH2 Draining tests because of the relative high pressure drop, which is induced by the pressure drop measurement section itself. The high flow rates required for the draining tests could not be achieved with the assembled pressure drop measurement section. The measurement section is assembled again and various flow rates are adjusted to determine the relation between the occurring pressure drop of the feed line and volume flow. The highest flow rate achieved (1,6 l/s) is lower than the required flow rate for the draining tests (1,651 l/s), but with the determination of the related pressure drop curve it is possible to extrapolate the pressure drop.