Design of an Actively Shuttered Dust-Resilient Radiator for Lunar Applications

dc.creatorGibson, Andrew S.
dc.creatorBailes-Brown, Dominic
dc.creatorIglesias, Angel
dc.creatorHumphries, Martin
dc.creatorBarber, Simeon
dc.creatorHager, Philipp
dc.descriptionAndrew S. Gibson, ESR Technology Limited, United Kingdom
dc.descriptionDominic Bailes-Brown, ESR Technology Limited, United Kingdom
dc.descriptionAngel Iglesias, Almatech, Switzerland
dc.descriptionMartin Humphries, Spacemech Limited, United Kingdom
dc.descriptionSimeon Barber, Space Science Solutions Limited, United Kingdom
dc.descriptionPhilipp Hager, European Space Agency (ESA), Netherlands
dc.descriptionICES104: Advances in Thermal Control Technology
dc.descriptionThe 52nd International Conference on Environmental Systems was held in Calgary, Canada, on 16 July 2023 through 20 July 2023.
dc.description.abstractThe design of radiators for the lunar surface must consider detrimental effects of lunar dust in terms of thermal performance, as well to the reliability of the mechanism. Radiator function is influenced by extreme temperature variations, where thermal cases must consider IR heating from the surface during the Lunar day as well as heat losses during the Lunar night. The overall challenge for the development was to maximize the range of functionality across a wide variety of lunar locations, while focusing on polar scenarios. In early stages, a thermal analytical model was developed in Python to study thermal shutter performance of 2 variants according to lunar latitude and orientation of the radiator, as it was required to maximize the shutters' usefulness. The trade-off resulted in the selection of the thermal shutter approach versus a louvered radiator concept, with the shutter favoured for lower mass and higher field of view and reliability. The actively shuttered design enables closure of the radiator to minimize heat losses at night and is also intended to protect from contamination during radiator during events and phases of the day with high expected dust deposition, such as the passing of the day/night terminator, landing, or activities of astronauts, rovers or robotic equipment. The paper describes progress made following one year of development, focusing on status. Results of component level breadboarding and an overview of the design of an Engineering Model unit will be covered, highlighting thermal design choices, risk mitigation activities and thermal capabilities predicted for this device as well as the mounting approach. The mechanism design will be described demonstrating the dust-resilient approach, suitable for lunar landers (EL3), rovers and other longer duration lunar surface applications.
dc.publisher2023 International Conference on Environmental Systems
dc.subjectthermal control
dc.titleDesign of an Actively Shuttered Dust-Resilient Radiator for Lunar Applications
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