Badanie właściwości eksploatacyjnych próżniowego kolektora słonecznego do grzania powietrza

摘要

W pracy przedstawiono system do badania właściwości eksploatacyjnych oraz wyniki testów prototypowego próżniowego, rurowego kolektora słonecznego do grzania powietrza. Przedstawiono metody obliczenia sprawności na podstawie ilości energii przenoszonej oraz na podstawie konstrukcji kolektora z systemem rozprowadzania powietrza. Na podstawie badań określono parametry kolektora. Sprawność tego typu kolektora powietrznego jest prawie dwukrotnie większe w porównaniu do kolektora cieczowego.%The paper describes a vacuum solar collector for heating air — an innovative solution for distribution of the system medium - air heated in a vacuum solar collector [5], A system for studying the properties and technical parameters of collectors and test results are presented. The energy absorbed in the air collector by an absorber is brought in a warm stream of the air flowing in collector channels - the system for distribution of the heated medium in the collector. The diagram of the system is shown in Fig. 1. To reduce costs there is proposed use of a vacuum tube in the solar collector to heat the air [4, 5], The lack of intermediary medium (for example water) significantly improves the solar collector efficiency and provides no possibility of overheating of the collector during stagnation. An air collector with 20 vacuum tubes T (SHENTAI) was used for tests. Measurements of temperature and solar radiation were taken remotely. During the experiment continuous recording of the collector operating parameters under real conditions was carried out. The tests proved that the collector thermal efficiency depended on the level of solar radiation, the increased temperature relative to the solar efficiency remained at a constant level. The efficiency of the air vacuum collector (60%) is almost twice as large as thai of the liquid collector.