Abstract
The thermal performance of three novel solar air collectors with perforating corrugated plate, slit-perforated plate, and corrugated packing were experimentally studied in this paper. Experiments were conducted in Tianjin to study the thermal and dynamic performance of the collectors in cold and severe cold regions. A chamber with a PID (Proportion Integration Differentiation) temperature controller was designed to control the inlet air temperature of the three collectors. Effects of radiation intensity, inlet air temperature, and flow rate on the thermal efficiency and outlet air temperature were experimentally studied. The results indicated that the thermal efficiency of the three collectors in severe cold regions could be much higher than 50% and the collector with perforating corrugated plate had the highest thermal efficiency. The inlet air flow rate had significant effects on the thermal comfort of buildings in cold and severe cold regions and it should be lower than 45 m3/h. The results indicated that the pressure drops of collectors with perforating corrugated plate were a little larger than the collectors with slit-perforated plate, but the thermal efficiency and outlet air temperature was higher. Therefore, the collector with perforating corrugated plate was more suitable to use in cold and severe cold regions.
Highlights
As the environmental pollution increases, the Chinese government is facing a great challenge to reduce the application of traditional energy and promote the application of renewable energy in cold regions, especially in rural areas
To improve the thermal comfort of buildings in cold and severe cold regions and reduce the environmental pollution caused by burning coal, straw, and so on, solar energy as a kind of clean and renewable energy is increasingly applied in the rural buildings
As inlet air flow increased, the thermal inlet air flow rate was lower than 45 m3/h, which was high enough to satisfy the thermal comfort of thermal efficiency of the collector with perforating corrugated platemuch became much higher than two the efficiency of the collector with perforating corrugated plate became higher than the other the buildings in severe cold regions
Summary
As the environmental pollution increases, the Chinese government is facing a great challenge to reduce the application of traditional energy and promote the application of renewable energy in cold regions, especially in rural areas. Zheng et al [12] studied the thermal performance of a glazed transpired solar collector with perforating corrugated plate in cold regions. The results indicated that the glazed transpired solar collector is applicable in rural areas of cold regions as a result of its advantages in economic and thermal performance. Compared with the collectors in the literatures, two new absorber plates with the slit-perforated plate and the perforating corrugated plate are introduced in this research to enhance convective heat transfer for the jet impingement. The thermal and dynamics performances of glazed transpired solar air collectors with slit-perforated plate, perforating corrugated plate, and metal corrugated packing in cold regions are experimentally studied. This study is very helpful for the improvement of heat collecting efficiency It can promote the application of solar air heaters in cold and severe cold regions
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
