Mr. James Hoag Profile

James Hoag

at AURA, Inc

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Proceedings Article | 13 December 2020 Poster + Paper

Developing an install plan for the DKIST carousel cooling system

Brialyn Onodera, James Hoag, Chriselle Galapon Nagata

Proceedings Volume 11445, 1144541 (2020) https://doi.org/10.1117/12.2560893

KEYWORDS: Cooling systems, Solar telescopes, Cladding, Mirrors, Sun, Telescopes, Control systems, Solar radiation, Camera shutters

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The Daniel K. Inouye Solar Telescope (DKIST) will be the largest solar telescope in the world, housing a 4 meter primary mirror that will enable observation of specific regions of the sun in higher resolution and greater detail than any existing telescope. The DKIST Facility Thermal Systems is comprised of various systems and components that contribute to maintaining an appropriate thermal environment for solar observation. One of these systems is the Carousel Cooling System, which contributes to active control of the Enclosure thermal environment. This system is intended to actively maintain the Enclosure exterior at, or just below, ambient temperature through a system of plate heat exchangers. These heat exchangers, termed plate coils, are designed to reject solar radiation from the Enclosure cladding in order to mitigate dome seeing effects caused by turbulent air of dissimilar temperatures. Per DKIST's specifications, OMEGA Thermo Products fabricated 232 type 304 stainless steel plate coils that are categorized into 104 different dimensions. These are in the process of being installed on the following sections of the Enclosure: Aperture Stop, Shutter, Arches and Vent Gates. This has further complicated installation as each section yields different requirements for lifting, integrating, mounting, and piping the various plate coils. Presented here is a review of the installation progress and future planning for the Carousel Cooling System.

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