In the context of Concentrated Solar Power (CSP), the Linear Fresnel Collector (LFC) system is a promising and reliable technology. In this document, a detailed study is conducted, with the aim to assess the performances of a LFC receiver unit, in several environmental scenarios, and in a wide range of temperature. The receiver unit encompasses an absorber tube and a compound parabolic concentrator (CPC), designed to insulate the environment around the tube. Multiple CFD simulations are describing in detail the behaviour of the system by means of a 2D model, that solves the energy balance between the receiver and the coolant (external air).