28 June 2015 to 2 July 2015
JW Marriott Starr Pass Resort
Etc/GMT-7 timezone

Modification of liquid hydrogen tank for integrated refrigeration and storage

30 Jun 2015, 16:15
15m
Tucson Ballroom GH ()

Tucson Ballroom GH

Contributed Oral Presentation CEC-01 - Large-Scale Refrigeration and Liquefaction C2OrG - Hydrogen and Other Systems

Speaker

Adam Swanger (NASA Kennedy Space Center)

Description

The modification and outfitting of a 125,000-liter liquid hydrogen tank was performed to provide integrated refrigeration and storage capability. These functions include zero boiloff, liquefaction, and densification and therefore requires provisions for sub-atmospheric tank pressures within the vacuum-jacketed, multilayer insulated tank. The primary structural modification was to add stiffening rings inside the inner vessel. The internal stiffening rings were designed, built, and installed per the ASME Boiler and Pressure Vessel Code, Section VIII, to prevent collapse in the case of vacuum jacket failure in combination with sub-atmospheric pressure within the tank. For the integrated refrigeration loop, a modular, skeleton-type heat exchanger, with refrigerant temperature instrumentation, was constructed using the stiffening rings as supports. To support the system thermal performance testing, three custom temperature rakes were designed and installed along the 21-meter length of the tank, once again using rings as supports. The temperature rakes included a total of 24 silicon diode temperature sensors mounted both vertically and radially to map the bulk liquid temperature within the tank. The tank modifications were successful and the system is now operational for the research and development of integrated refrigeration technology.

Primary author

Adam Swanger (NASA Kennedy Space Center)

Co-authors

Bill Notardonato (NASA Kennedy Space Center) James Fesmire (NASA) Kevin Jumper (Sierra Lobo ESC)

Presentation Materials

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