Study on Solar Heating Performance of Solar Fresh Air System

Due to the global spread of COVID-19, indoor air quality has been paid more and more attention by many countries. However, the ventilation of buildings often causes a significant increment in buildings' heating and cooling load, especially in the winter of the Northern Hemisphere. Solar fresh air systems can provide heated fresh air to buildings on sunny days. This system can provide not only fresh air to buildings but also improve indoor air quality. At the same time, the heating load of buildings will be significantly decreased by the application of this new system. Solar fresh air systems can even take the existing heating energy source's place under high solar irradiation. The solar heating performance of the solar fresh air system is affected by many factors. The two most important factors are the structure of the solar heating panel and the performance of solar absorption coating on the solar heating panel. This research project has built three sets of real solar fresh air systems to test the influence of different solar absorption coatings and different solar heating panel structures on the heating performance of the solar fresh air system. This paper focuses on the test of stagnation performance and solar heating efficiency. © 2021. The Authors. Published by International Solar Energy Society Selection and/or peer review under responsibility of Scientific Committee.