DYNOVAS INC SBIR Phase I Award, August 2023

Dynovasrsquo; Composite Cryogenic Hydrogen Insulated Lightweight Lined (C-CHILL) storage system provides a novel solution that specifically addresses NASArsquo;s call for development of liquid hydrogen compatible composite tanks for reusable systems such as spacecraft, surface systems, and hydrogen aircraft for long-duration storage of liquid hydrogen. The solution was developed based on previous technologies that have been proven for cryogenic storage, and advances on the state of the art to achieve long-duration cryogenic fluid storage.nbsp;Dynovasrsquo; C-CHILL is scalable for a wide range of applications spanning aircraft, spacecraft, landers, rovers, launch vehicles, and refueling tanks.Dynovasrsquo; proposed C-CHILL tank design leverages proven cryogenic hydrogen storage technologies and processes,nbsp;and incorporates additional improvements to achieve a mass-efficient structural design fornbsp;long duration storage with improved lifecycle capability. These include:Thin Ply Composite Materials ndash; Toughened thin-ply composite materials that allow an increased number of cross laminates in the composite overwrap, greatly reducing microcrackingVacuum Jacketed Insulation ndash; Vacuum insulated layer including composite honeycomb core and MLI between the inner and outer tanks, acting as a structural member and thermal barrierTrapped Polymer Liner ndash; Polymer liner designed for use at cryogenic temperatures, retained within the composite laminate greatly reducing hydrogen permeation through the tank wallsNanomaterial Integration ndash; Integration of thin-walled carbon nanotubes within the matrix during winding to increase micro-crack resistance, by increasing strength and toughnessUsing these technologies together, Dynovasrsquo; C-CHILL will advance cryogenic hydrogen storage solutions to achieve long-duration storage with improved life-cycle capability, accounting for use cases requiring gt;5,000 pressure cycles at cryogenic temperatures (20K), and gt;10,000 thermal cycles between 20K and 300K.nbsp;