A thermal comfort evaluation model, based on energy balance principles, is developed for assessing indoor thermal comfort in a room equipped with a built-middle PV-Trombe wall during the heating season. The study also investigates how the installation location of the absorber plate affects indoor thermal comfort. Results show that while the built-middle PV-Trombe wall improves indoor thermal comfort, it maintains only a basic level of comfort overall. Between 9:00 and 13:00, the indoor environment remains cold, resulting in occupant discomfort. However, when solar radiation is low, the enclosed air layer formed by the photovoltaic panel and glass cover can still help maintain a more comfortable room temperature. Positioning the absorber plate on the outer surface of the massive wall enhances the indoor thermal environment, reducing discomfort duration by one hour without additional costs. The thermal comfort evaluation model constructed here allows for easy prediction of indoor thermal comfort variations over time, facilitating dynamic management of indoor temperature.