CFD Simulation of a Heat Pump for a Two-Circuit Solar System with Thermosiphon Circulation

This article presents a new design concept to demonstrate a solar heat supply system. The system includes a system designed to supply cold water to solar heating installations, eliminating the need for expensive antifreeze and additional auxiliary systems. This can potentially reduce installation costs by eliminating the need for additional heat exchangers. Key parameters related to the thermal capacity of a flat solar collector are analyzed, including the temperature profile of the collector’s absorber plate when the inlet temperature is set to 30 °C. Unlike coil-type temperature circuits, it has been observed that under identical inlet temperature conditions, it is significantly lower. Using the commercial software package ANSYS FLUENT 19.0, a step-by-step project was developed to predict the thermal characteristics of equivalent absorber plates. In addition, experimental data showed that this led to higher temperature results compared to environmental conditions.