MAORY/MORFEO@ELT: Thermal Control System preliminary design

MORFEO (formerly known as MAORY) is an adaptive optics module able to compensate the wavefront disturbances affective the scientific observation. It will be installed on the straight-through port of the telescope Nasmyth platform to serve the first-light instrument MICADO and with the provision for a future second instrument. The module underwent the Preliminary Design Review in 2021 and is expected to be commissioned in 2029. In this paper we present the current status of the Thermal Control System (ThCS) including the modifications required during the Preliminary Design Review. Due to the peculiar optical and mechanical design, a number of FEM and CFD analysis have been performed to verify the compliance of the system to the technical budget. The results of those analysis are then showed together with the current thermal and cooling circuits design derived from them.