Speakers
Dr
Ahmed Sidi-Yekhlef
(Jefferson Laboratory)Mr
Jonathan Homan
(NASA-Johnson Space Center)
Description
NASA at the Johnson Space Center (JSC) in Houston is presently working toward modifying the original forced flow liquid nitrogen cooling system for the thermal shield in the environmental control chamber-A (65’ dia x 120’ high) to work as a natural flow (thermo siphon) system. The new thermo siphon system will improve the reliability, stability, and operating temperature while reducing the amount of liquid nitrogen used to operate the system.
This paper will present the requirements for the various operating modes. System level thermodynamic comparisons of the existing system to the various options studied and the selected option. A thermal and hydraulic analysis used to validate the selected option for the conversion of the current design will be discussed. The modifications to the existing system as well as design features that improve the operations and maintenance will be presented.
| Proposed for workshop session (see call for abstracts): 1- Operation 2- Maintenance 3 - Safety 4 - Control | 1 |
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Author
Mr
Jonathan Homan
(NASA-Johnson Space Center)
Co-author
Dr
Ahmed Sidi-Yekhlef
(Jefferson Laboratory)
