Experimental Investigation of the Transpired Solar Air Collectors and Metal Corrugated Packing Solar Air Collectors
Abstract
:1. Introduction
2. Experimental Setup
3. Experimental Results and Discussion
3.1. Evaluation Index
3.2. Variation of Outdoor Air Temperature and Radiation Intensity
3.3. Effects of Radiation Intensity
3.4. Effects of Inlet Temperature
3.5. Effects of Flow Rate
3.6. Pressure Drops
3.7. Economic Analysis
4. Conclusions
- (1)
- As the effects of jet impingement of the air through the perforating corrugated plate and the enlarging of heat transfer area, the thermal performance of the solar air collector with perforating corrugated plate is higher than the other collectors.
- (2)
- The flow rate of inlet air has significant effects on the thermal comfort of buildings in cold and severe cold regions. The experimental results indicate that the inlet air flow rate should be lower than 45 m3/h to satisfy the thermal comfort of buildings in severe cold regions.
- (3)
- The correlations between the friction factor and Reynolds number of the three collectors are fitted with the experimental results. The dynamics analysis results indicate that the pressure drop of the collector with slit-perforated plate was the least and the pressure drop of the collector with corrugated packing was the most.
- (4)
- Although the pressure drop and power consumption of the collector with perforating corrugated plate was a little larger than the collector with slit-perforated plate while the air flow rate is the same, the operation cost is lower for its better thermal performance. Therefore, the collector with perforating corrugated plate was more suitable for use in the cold and severe cold regions.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Instruments | Accuracy | Instruments | Accuracy |
---|---|---|---|
K-type thermocouples | ±0.75%t °C | Microelectronic pressure gauge | ±(2% + 0.25) |
Radiometer | ±2% | ||
Flowmeter | ±3% | Hot-wire anemometer | ±0.02 m/s |
Solar Air Collector | Initial Cost | Operating Cost | Life Cycle Cost |
---|---|---|---|
Perforating corrugated plate | 3500 RMB | 7500 RMB | 11,000 RMB |
Slit-perforated plate | 3000 RMB | 9000 RMB | 12,000 RMB |
Corrugated packing | 3100 RMB | 10,300 RMB | 13,400 RMB |
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Zheng, W.; Zhang, H.; You, S.; Fu, Y. Experimental Investigation of the Transpired Solar Air Collectors and Metal Corrugated Packing Solar Air Collectors. Energies 2017, 10, 302. https://doi.org/10.3390/en10030302
Zheng W, Zhang H, You S, Fu Y. Experimental Investigation of the Transpired Solar Air Collectors and Metal Corrugated Packing Solar Air Collectors. Energies. 2017; 10(3):302. https://doi.org/10.3390/en10030302
Chicago/Turabian StyleZheng, Wandong, Huan Zhang, Shijun You, and Yindan Fu. 2017. "Experimental Investigation of the Transpired Solar Air Collectors and Metal Corrugated Packing Solar Air Collectors" Energies 10, no. 3: 302. https://doi.org/10.3390/en10030302
APA StyleZheng, W., Zhang, H., You, S., & Fu, Y. (2017). Experimental Investigation of the Transpired Solar Air Collectors and Metal Corrugated Packing Solar Air Collectors. Energies, 10(3), 302. https://doi.org/10.3390/en10030302