Design of the Apache Point Observatory 3.5 M telescope. V - Telescope enclosure thermal modeling

Details Design of the Apache Point Observatory 3.5 M telescope. V - Telescope enclosure thermal modeling Design of the Apache Point Observatory 3.5 M telescope. V - Telescope enclosure thermal modeling

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1236..559s&link_type=abstract

IN: Advanced technology optical telescopes IV; Proceedings of the Meeting, Tucson, AZ, Feb. 12-16, 1990. Part 1 (A91-23201 08-89

Astronomy and Astrophysics

Astronomy

Radiative Heat Transfer, Seeing (Astronomy), Telescopes, Thermal Analysis, Mathematical Models, Reflectance, Thermal Conductivity

Scientific paper

A 3.5 m telescope is under construction at Apache Point near Alamogordo, New Mexico, at an elevation of 2800 m. A thermal model of a telescope enclosure is described. The model evaluates various strategies for minimizing local sources of image degradation (dome seeing). Direct and diffuse insolation, radiation to the sky, conduction, and the thermal inertia of the walls, interior air, roof, and structural steel are included. It is observed that highly reflective surface coatings reduce heat absorbed during the day, but are not very effective in reducing heat transfer in the telescope chamber at night, assuming that components with large heat capacities or thermal time constants are insulated.

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