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Proceedings Paper

Plate coil thermal test bench for the Daniel K. Inouye Solar Telescope (DKIST) carousel cooling system
Author(s): LeEllen Phelps; Gaizka Murga; Guillermo Montijo Jr.; David Hauth
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Paper Abstract

Analyses have shown that even a white-painted enclosure requires active exterior skin-cooling systems to mitigate dome seeing which is driven by thermal nonuniformities that change the refractive index of the air. For the Daniel K. Inouye Solar Telescope (DKIST) Enclosure, this active surface temperature control will take the form of a system of water cooled plate coils integrated into the enclosure cladding system. The main objective of this system is to maintain the surface temperature of the enclosure as close as possible to, but always below, local ambient temperature in order to mitigate this effect. The results of analyses using a multi-layer cladding temperature model were applied to predict the behavior of the plate coil cladding system and ultimately, with safety margins incorporated into the resulting design thermal loads, the detailed designs. Construction drawings and specifications have been produced. Based on these designs and prior to procurement of the system components, a test system was constructed in order to measure actual system behavior. The data collected during seasonal test runs at the DKIST construction site on Haleakalā are used to validate and/or refine the design models and construction documents as appropriate. The test fixture was also used to compare competing hardware, software, components, control strategies, and configurations. This paper outlines the design, construction, test protocols, and results obtained of the plate coil thermal test bench for the DKIST carousel cooling system.

Paper Details

Date Published: 4 August 2014
PDF: 8 pages
Proc. SPIE 9150, Modeling, Systems Engineering, and Project Management for Astronomy VI, 91501Q (4 August 2014); doi: 10.1117/12.2057029
Show Author Affiliations
LeEllen Phelps, National Solar Observatory (United States)
Gaizka Murga, AEC IDOM (United States)
Guillermo Montijo Jr., National Solar Observatory (United States)
David Hauth, National Solar Observatory (United States)

Published in SPIE Proceedings Vol. 9150:
Modeling, Systems Engineering, and Project Management for Astronomy VI
George Z. Angeli; Philippe Dierickx, Editor(s)

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