WP2 System Requirements and KPIs
Delivery of the D2.1 High Level Requirements and Objectives (HLRO) document. This document covers certification, safety and integration onto the aircraft, including the definition of the interfaces and the fuel cell requirements. Delivery of D2.2 General Requirements and Objectives (GRO), including comprehensive components and interface definitions. Flight load and tank interface analyses were also completed.
WP3 Integrated LH2 design
WP3 scope has grown tin include several additional actions identified after the start of the project - including extensive material testing, sub-element testing, processing trials, and the design of additional. The material test campaign was completed in M18, confirming the tank design & manufacturing plan. PDR was passed in M14, and CDR in M18.
WP4 Tank thermal and pressure management
In WP4, generalised thermomechanical, and computational fluid dynamics models were developed and used to analyse the COCOLIH2T tank. Completed work includes a sizing study to inform fuelling, refuelling and defueling strategies. Pressure management strategies and system architectures were developed. Using multi-dimensional modelling, the boil-off characteristics of LH2 were explored, and sloshing dynamics analysed. MLI testing has been used to validate and up-issue thermal models.
WP5 Subsystem development
Ancillary components and sub-systems are being developed within WP5. These include piping, valves, gauges and sensors required for safe operation of a liquid hydrogen tank.
System architectures and control system algorithms for fuel monitoring, including hydrogen level gauging, have been designed.
WP6 Tank health monitoring and inspection system
Investigation and down selection of the sensor technologies for structural health monitoring (SHM) and fuel system health monitoring (PHM), including algorithm development. Prototype development of an automated NDI system capable of inner tank inspection. Down-selected sensor technologies were validated through empirical testing and analysis both at room and cryogenic temperatures.
WP7 System integration and demonstration
As part of system integration preparation, test rigs, V&V plans and associated site infrastructure plans have been developed. Specifically, handling and test/assembly frames were designed, a test campaign for the first demonstrator was compiled to pre-test sensors. Additionally, WP7 contributed considerably to an assembly plan for both demonstrators in corporation with WP3-WP6, as well as the realisation of NLR's Energy to Propulsion Test Facility (EPTF).
WP8 Safety & Life Cycle Evaluation
A preliminary safety review of the liquid hydrogen storage system design was performed. A database categorising and evaluating 1000 incidents reported in the existing literature resulted in the derivation of 43 safety criteria. This database, along with an accompanying report, has been published in a public deliverable.
WP9 Communication, dissemination, exploitation and standardisation
A public website and LinkedIn page have been set up. Dissemination to date include press releases, conferences participation, CHJU/CAJU workshop attendance, and various informal events (e.g. trade shows, posters, etc.). The CAB (COCOLIH2T Advisory Board) has been established and interactions are ongoing.
