Concentrated solar power systems are preferred for high-temperature applications and are used to meet the energy demand by harnessing the available solar radiation. One such system is the parabolic dish collector, a point-focused concentrated solar power system used in power generation and industrial process heat applications. In the present work, a parabolic dish collector of a 40 m² circular aperture is considered, which is part of an integrated solar energy system for the cascade process heat applications. To capture the reflected incoming solar rays through parabolic-shaped mirrors, the cavity receiver is placed in the focal zone. The cavity receiver consists of tube coils where solar radiation gets absorbed and conveys the heat to working fluid for further utilization in various applications. The considered cavity receiver is double conical coil tubes coupled together, namely, the corrugation cavity receiver. As the said integrated system is used in the open ambiance, the heat loss from the receiver is a significant concern for thermal performance. Due to high surface temperature and wind flow complexity, estimating heat loss becomes very important to evaluate the whole system's performance. To accomplish this, coupled optical-thermal modeling is carried out for the parabolic dish receiver system. The commercial optical tool, ASAP^® v2013, is adopted for optical analysis, providing heat flux data. Then, this data is mapped to the surface as boundary conditions to accomplish the thermal modeling using ANSYS^® Fluent 2021 R1. The influential parameters to heat loss from the receiver are mainly wind characteristics and receiver orientations. The considered ranges of parameters are 0-10 m/s for the wind speed of head-on direction and 0-90° for receiver orientation to carry out this study. This coupled model could be helpful for researchers and engineers in designing the solar parabolic dish collector.