Periodic Reporting for period 1 - OVERLEAF (nOVel low-prEssure cRyogenic Liquid hydrogEn storAge For aviation.)
Reporting period: 2022-05-01 to 2023-10-31
In the first 18 months of the project, the main challenges to be achieved were the development of materials compatible with the working conditions of the demonstrator. In the execution of the tests matrix, the need to carry out more tests than those planned in the proposal was identify, to guarantee the viability of the demonstrator. That is why an amendment was requested, which included modification of the cost category to be able to carry out more tests. For the next 18 months, pending tests will be carried out due to their complexity.
Regarding the development of the disruptive solution, the design has reached a Preliminary Design Review maturity, in which not only the results of the tests carried out but also the manufacturing capabilities of the partners and the design analyzes have been integrated.
Regarding the development of the disruptive solution, the design has reached a Preliminary Design Review maturity, in which not only the results of the tests carried out but also the manufacturing capabilities of the partners and the design analyzes have been integrated.
Definition of the different requirements needed for the materials and how to physically and practically evaluate them by test. Followed by a preselection of materials that would theoretically agree with the objective, commercial or develop by OVERLEAF partners. Different tests were done by partners or subcontract to analysis the properties and compere the different material selection.
In addition to material optimization, in WP3 the manufacturing process of the demonstrator has been develop. With focus on the Inner and External tank on the optimization of the trajectories, which is an additional challenge as the tank design is based on a spherical geometry. Therefore, the aim is to achieve a stack that maximizes mechanical properties and reduces permeability. For this reason, it is necessary to combine different strategies to solve the problem of the accumulation of tapes on the pole.
Initial configuration of the system considered a hollow inner tank to reduce weight and complexity, other optimized parameters of the system are component thicknesses. For the inner tank, the thickness was set from the beginning as the minimum one defined by the manufacturing process, as it was expected to withstand low loads. Further simulations have proven the inner tank is not compromised with this thickness, so the minimum value of 2.5mm (after machining 0.5mm from the outer surface) is seen as the optimal choice). As for the outer tank, all analyses are provisional until the final material is selected and characterized. The thickness of each insulation layers are sized in order to comply with the dormancy objective.
In addition to material optimization, in WP3 the manufacturing process of the demonstrator has been develop. With focus on the Inner and External tank on the optimization of the trajectories, which is an additional challenge as the tank design is based on a spherical geometry. Therefore, the aim is to achieve a stack that maximizes mechanical properties and reduces permeability. For this reason, it is necessary to combine different strategies to solve the problem of the accumulation of tapes on the pole.
Initial configuration of the system considered a hollow inner tank to reduce weight and complexity, other optimized parameters of the system are component thicknesses. For the inner tank, the thickness was set from the beginning as the minimum one defined by the manufacturing process, as it was expected to withstand low loads. Further simulations have proven the inner tank is not compromised with this thickness, so the minimum value of 2.5mm (after machining 0.5mm from the outer surface) is seen as the optimal choice). As for the outer tank, all analyses are provisional until the final material is selected and characterized. The thickness of each insulation layers are sized in order to comply with the dormancy objective.
The main two impacts achive in this period are the materials develop by CANOE for the inner tank with better properties not only for mechanical properties but also better behaviour at CT.
The open cell materials develop by AIMPLAS has the same insulation properties but with a high reduction on the density which helps to the final objective of Gavimetric Index.
The open cell materials develop by AIMPLAS has the same insulation properties but with a high reduction on the density which helps to the final objective of Gavimetric Index.