The Validation and Performance Analysis of a UV Air-Cleaning System for the Indoor Air Quality of Populated Indoor Spaces
Abstract
1. Introduction
2. Materials and Methods
2.1. Experimental Area
2.2. Energy Recovery System (Energy Recovery Ventilator)
2.3. Air Boxes for Indoor Air Quality Monitoring
2.4. Single-Stage Viable Impactor Sampling System
2.5. Investigating the Bacterial Concentrations in the Air
2.6. The Design of UV Air-Cleaning Device
2.7. Performance Testing
2.8. K-M Model
3. Results
3.1. Results with ERV Turned on Only
3.1.1. Sampling of CO2 and Airborne Particle Concentrations
3.1.2. CO2 and PM2.5 Concentrations
3.2. Results with Both ERV and UV
The CFU Reduction Performance
4. Discussion
Application of K-M Model
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Condition index | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
Fan air speed | L | L | L | L | M | M | M | M | H | H | H | H |
Group index | 2 | 2 | 4 | 4 | 2 | 2 | 4 | 4 | 2 | 2 | 4 | 4 |
Reduction time | 30 | 60 | 30 | 60 | 30 | 60 | 30 | 60 | 30 | 60 | 30 | 60 |
Two-Group UV Lamps | Four-Group UV Lamps | ||||||
---|---|---|---|---|---|---|---|
Location | Fan Coil Air Velocity (m/s) | Background Value Concentration (CFU/m3) | 30 min Concentration (CFU/m3) | 60 min Concentration (CFU/m3) | Background Value Concentration (CFU/m3) | 30 min Concentration (CFU/m3) | 60 min Concentration (CFU/m3) |
FCU | 1.0 | 473.5 | 130.8 | 63.6 | 265 | 77.8 | 60.1 |
1.6 | 473.5 | 74.2 | 60.1 | 473.5 | 130.7 | 70.7 | |
2.2 | 346.3 | 56.6 | 31.9 | 88.4 | 74.2 | 67.2 | |
experimental area | 1.0 | 381.7 | 99.0 | 53.0 | 540.7 | 99.0 | 53.0 |
1.6 | 466.5 | 176.7 | 141.4 | 466.5 | 236.8 | 159.0 | |
2.2 | 416.9 | 250.9 | 127.2 | 328.6 | 144.9 | 120.1 | |
office area | 1.0 | 402.9 | 88.3 | 38.9 | 378.2 | 88.3 | 56.6 |
1.6 | 607.8 | 222.6 | 229.7 | 607.8 | 215.6 | 148.4 | |
2.2 | 445.2 | 176.6 | 162.6 | 282.7 | 95.4 | 77.7 |
Two-Group UV Lamps | Four-Group UV Lamps | ||||
---|---|---|---|---|---|
Location | Fan Coil Air Velocity (m/s) | 30 min CFU Reduction Rates (%) | 60 min CFU Reduction Rates (%) | 30 min CFU Reduction Rates (%) | 60 min CFU Reduction Rates (%) |
FCU | 1.0 | 72.4 | 86.6 | 70.7 | 77.3 |
1.6 | 84.3 | 87.3 | 72.4 | 85.1 | |
2.2 | 83.7 | 90.8 | 16.0 | 24.0 | |
experimental area | 1.0 | 74.1 | 86.1 | 81.7 | 90.2 |
1.6 | 62.1 | 69.7 | 49.2 | 65.9 | |
2.2 | 39.8 | 69.5 | 55.9 | 63.5 | |
office area | 1.0 | 78.1 | 90.4 | 76.7 | 85.1 |
1.6 | 63.4 | 62.2 | 64.5 | 75.6 | |
2.2 | 60.3 | 63.5 | 66.3 | 72.5 |
Reduction Rate | ||||
---|---|---|---|---|
Group Index | Reduction Time | L | M | H |
2 | 30 | 72.4% | 84.3% | 83.7% |
2 | 60 | 86.6% | 87.3% | 90.8% |
4 | 30 | 70.7% | 72.4% | 16.0% |
4 | 60 | 77.3% | 85.1% | 24.0% |
Condition Index | CADRERV (CFM) | CADRUV (CFM) | CADRERV+UV (CFM) |
---|---|---|---|
1 | 294.3 | 298.2 | 592.5 |
2 | 294.3 | 356.7 | 651.0 |
3 | 294.3 | 291.1 | 585.4 |
4 | 294.3 | 318.6 | 612.9 |
5 | 294.3 | 556.0 | 850.3 |
6 | 294.3 | 575.6 | 869.9 |
7 | 294.3 | 477.2 | 771.5 |
8 | 294.3 | 560.8 | 855.1 |
9 | 294.3 | 758.4 | 1052.7 |
10 | 294.3 | 823.0 | 1117.3 |
11 | 294.3 | 145.2 | 439.5 |
12 | 294.3 | 217.5 | 511.8 |
Condition Index | CSSERV (CFU/m3) | CSSUV (CFU/m3) | CSSERV+UV (CFU/m3) |
1 | 69.8 | 68.9 | 34.7 |
2 | 69.8 | 57.6 | 316 |
3 | 39.08 | 39.5 | 19.7 |
4 | 39.08 | 36.1 | 18.8 |
5 | 69.8 | 37.9 | 24.2 |
6 | 69.8 | 35.7 | 23.6 |
7 | 69.8 | 43.1 | 26.6 |
8 | 69.8 | 36.6 | 24.0 |
9 | 51.1 | 19.8 | 14.3 |
10 | 51.1 | 18.3 | 13.4 |
11 | 13.0 | 26.4 | 8.7 |
12 | 13.0 | 17.6 | 7.5 |
Condition Index | D90 (min) |
---|---|
ERV only | 25.3–49.6 |
1 | 22.3 |
2 | 19.1 |
3 | 22.7 |
4 | 21.1 |
5 | 12.0 |
6 | 11.5 |
7 | 14.3 |
8 | 11.9 |
9 | 8.0 |
10 | 7.1 |
11 | 35.6 |
12 | 28.1 |
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Chou, H.-Y.; Cheng, H.-J.; Hsu, L.-H.; Huang, C.-K. The Validation and Performance Analysis of a UV Air-Cleaning System for the Indoor Air Quality of Populated Indoor Spaces. Buildings 2025, 15, 1893. https://doi.org/10.3390/buildings15111893
Chou H-Y, Cheng H-J, Hsu L-H, Huang C-K. The Validation and Performance Analysis of a UV Air-Cleaning System for the Indoor Air Quality of Populated Indoor Spaces. Buildings. 2025; 15(11):1893. https://doi.org/10.3390/buildings15111893
Chicago/Turabian StyleChou, Hao-Yuan, Hsiu-Ju Cheng, Ling-Hang Hsu, and Chen-Kang Huang. 2025. "The Validation and Performance Analysis of a UV Air-Cleaning System for the Indoor Air Quality of Populated Indoor Spaces" Buildings 15, no. 11: 1893. https://doi.org/10.3390/buildings15111893
APA StyleChou, H.-Y., Cheng, H.-J., Hsu, L.-H., & Huang, C.-K. (2025). The Validation and Performance Analysis of a UV Air-Cleaning System for the Indoor Air Quality of Populated Indoor Spaces. Buildings, 15(11), 1893. https://doi.org/10.3390/buildings15111893