The thermal performance of three novel solar air collectors with perforating corrugated\nplate, slit-perforated plate, and corrugated packing were experimentally studied in this paper.\nExperiments were conducted in Tianjin to study the thermal and dynamic performance of the\ncollectors in cold and severe cold regions. A chamber with a PID (Proportion Integration\nDifferentiation) temperature controller was designed to control the inlet air temperature of the\nthree collectors. Effects of radiation intensity, inlet air temperature, and flow rate on the thermal\nefficiency and outlet air temperature were experimentally studied. The results indicated that the\nthermal efficiency of the three collectors in severe cold regions could be much higher than 50% and\nthe collector with perforating corrugated plate had the highest thermal efficiency. The inlet air flow\nrate had significant effects on the thermal comfort of buildings in cold and severe cold regions and\nit should be lower than 45 m3/h. The results indicated that the pressure drops of collectors with\nperforating corrugated plate were a little larger than the collectors with slit-perforated plate, but the\nthermal efficiency and outlet air temperature was higher. Therefore, the collector with perforating\ncorrugated plate was more suitable to use in cold and severe cold regions.
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