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2025 Vol.45, Issue 2 Preview Page

Research Article

Evaluation of Thermal Performance of an Unglazed Transpired Collector based on Numerical Analysis for Agricultural Buildings

농업시설 활용을 위한 수치해석 기반 무창기공형 태양열 집열기 열성능 평가

Byeong-Eun Moon1
,
Dae-Yeong Kang2
,
Hyeon-Tae Kim3*
문 병은1
,
강 대영2
,
김 현태3*
1Assistant Professor, Department of Convergence Biosystems Engineering, Sunchon National University
2Ph. D. Candidate, Department of Smart Farm, Gyeongsang National University (Institute of Smart Space Agriculture (ISSA))
3Professor, Department of Bio-Systems Engineering, Gyeongsang National University (Institute of Smart Space Agriculture (ISSA))
1국립순천대학교 융합바이오시스템기계공학과, 조교수
2경상국립대학교 스마트팜학과(스마트팜․우주농업연구소), 대학원생
3경상국립대학교 바이오시스템공학과(스마트팜․우주농업연구소), 교수
*Corresponding Author
30 April 2025. pp. 47-62
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Abstract

In this study, an experimental setup for an unglazed transpired collector was developed to evaluate temperature variations and efficiency. Temperature variations and efficiency were measured using the experimental setup and predicted through a numerical analysis based on computational fluid dynamics (CFD) and a 3D model. Finally, the measured and predicted values were compared and analyzed to evaluate the potential applicability for agricultural buildings. The experimental setup and scaled-down 3D model without repetitive shapes were developed to conduct the experiments and simulations. Under the same experimental conditions, the maximum measured outlet temperature was 65.4°C, whereas the predicted temperature was 65.2°C. The coefficient of determination (R2) and root mean square error (RMSE) obtained from the comparison between measured and predicted values for the unglazed transpired collector were R2 = 0.64, RMSE = 5.76°C for the absorber surface temperature; R2 = 0.98, RMSE = 2.65°C for the plenum temperature; and R2 = 0.99, RMSE = 0.83°C for the outlet temperature. The average experimental thermal efficiency of the unglazed transpired collector was 66%, whereas the numerically predicted efficiency was estimated to be 72%.

Keywords
Agricultural energy
Computational fluid dynamics
Solar air heater
Solar thermal system
Solar collector
키워드
농업에너지
전산유체역학
태양열 공기 가열기
태양열 시스템
태양열 집열기
References
1

KOSIS, Status and Production of Vegatable Greenhouse, 2024. https://kosis.kr/index/index.do. last accessed on the 3th December 2024.

2

Lee, J. K., Kang, D. H., Oh, S. H., and Lee, D. H., Strategies about Optimal Measurement Matrix of Environment Factors inside Plastic Greenhouse, Protected Horticulture and Plant Factory, Vol. 29, No. 2, pp. 161-170, 2020, https://doi.org/10.12791/KSBEC.2020.29.2.161.

10.12791/KSBEC.2020.29.2.161
3

Cakir, U. and Sahin, E., Using Solar Greenhouses in Cold Climates and Evaluating Optimum Type According to Sizing, Position and Location: A Case Study, Computers and Electronics in Agriculture, Vol. 117, pp. 245-257, 2015, https://doi.org/10.1016/j.compag.2015.08.005.

10.1016/j.compag.2015.08.005
4

Jiang, W., Jin, Y., Liu, G., Ju, Z., Arici, M., Li, D., and Guo, W., Net-zero Energy Optimization of Solar Greenhouses in Severe Cold Climate using Passive Insulation and Photovoltaic, Journal of Cleaner Production, Vol. 402, pp. 1-12, 2023, https://doi.org/10.1016/j.jclepro.2023.136770.

10.1016/j.jclepro.2023.136770
5

Joudi, K. A. and Farhan, A. A., Greenhouse Heating by Solar Air Heaters on the Roof, Renewable Energy, Vol. 72, pp. 406-414, 2014, https://doi.org/10.1016/j.renene.2014.07.025.

10.1016/j.renene.2014.07.025
6

Kooli, S., Bouadila, S., Lazaar, M., and Farhat, A., The Effect of Nocturnal Shutter on Insulated Greenhouse using a Solar Air Heater with Latent Storage Energy, Solar Energy, Vol. 115, pp. 217-228, 2015, https://doi.org/10.1016/j.solener.2015.02.041.

10.1016/j.solener.2015.02.041
7

Bastien, D. and Athienitis, A. K., Passive Thermal Energy Storage, Part 2: Design Methodology for Solaria and Greenhouses, Renewable Energy, Vol. 103, pp. 537-560, 2017, https://doi.org/10.1016/j.renene.2016.11.041.

10.1016/j.renene.2016.11.041
8

El-Maghlany, W. M., Teamah, M. A., and Tanaka, H., Optimum Design and Orientation of the Greenhouses for Maximum Capture of Solar Energy in North Tropical Region, Energy Conversion and Management, Vol. 105, pp. 1096-1104, 2015, https://doi.org/10.1016/j.enconman.2015.08.066.

10.1016/j.enconman.2015.08.066
9

Chen, C., Ling, H., Zhai, Z., Li, Y., Yang, F., Han, F., and Wei, S., Thermal Performance of an Active-passive Ventilation Wall with Phase Change Material in Solar Greenhouses, Applied Energy, Vol. 216, pp. 602-612, 2018, https://doi.org/10.1016/j.apenergy.2018.02.130.

10.1016/j.apenergy.2018.02.130
10

Xu, W., Guo, H., and Ma, C., An Active Solar Water Wall for Passive Solar Greenhouse Heating, Applied Energy, Vol. 308, pp. 1-13, 2022, https://doi.org/10.1016/j.apenergy.2021.118270.

10.1016/j.apenergy.2021.118270
11

Choi, H. U., Kim, Y. B., Son, C. H., Yoon, J. I., and Choi, K. H., Research on the Heat Transfer and Pressure Drop by Installation Conditions of Rectangular Obstacle in a Solar Air Heater Based on CFD, Journal of the Korean Solar Energy Society, Vol. 39, No. 1, pp. 77-89, 2019, https://doi.org/10.7836/kses.2019.39.1.077.

10.7836/kses.2019.39.1.077
12

Kim, Y. J., Kim, K. B., Lee, E. J., and Kang, E. C., Study on Solar Air Thermal Performance Test based on International Standard, Journal of the Korean Solar Energy Society, Vol. 41, No. 1, pp. 13-23, 2021, https://doi.org/10.7836/kses.2021.41.1.013.

10.7836/kses.2021.41.1.013
13

Kim, Y. J., Wang, E. S., Lee, B. J., Shin, H. K., Lee, E. J., and Kang, E. C., A Thermal Performance Reliability Study on A Solar Air Collector depending on Ambient Temperature Variation, Journal of the Korean Solar Energy Society, Vol. 41, No. 3, pp. 139-147, 2021, https://doi.org/10.7836/kses.2021.41.3.139.

10.7836/kses.2021.41.3.139
14

Moon, B. E., Lee, G. H., Basak, J. K., Elanchezhian, A., Deb, N. C., Seo, E. W., Kim, H. J., and Kim, H. T., Evaluation of Thermal Performance through the Change of Exhaust Airflow Rate for Cooling Effect of an Unglazed Transpired Collector in Livestock Facility, Journal of Agriculture & Life Science, Vol. 58, No. 3, pp. 123-138, 2024, https://doi.org/10.14397/jals.2024.58.3.123.

10.14397/jals.2024.58.3.123
15

Bake, M., Shukla, A., Liu, S., and Agrawal, A., A Systematic Review on Parametric dependencies of Transpired Solar Collector Performance, International Journal of Energy Research, Vol. 43, pp. 86-112, 2019, https://doi.org/10.1002/er.4200.

10.1002/er.4200
16

Wang, Y., Shukla, A., and Liu, S., A State of Art Review on Methodologies for Heat Transfer and Energy Flow Characteristics of the Active Building Envelopes, Renewable and Sustainable Energy Reviews, Vol. 78, pp. 1102-1116, 2017, https://doi.org/10.1016/j.rser.2017.05.015.

10.1016/j.rser.2017.05.015
17

Leon, M. A. and Kumar, S., Mathematical Modeling and Thermal Performance Analysis of Unglazed Transpired Solar Collectors, Solar Energy, Vol. 81, pp. 62-75, 2007, https://doi.org/10.1016/j.solener.2006.06.017.

10.1016/j.solener.2006.06.017
18

Collins, M. R. and Abulkhair, H., An Evaluation of Heat Transfer and Effectiveness for Unglazed Transpired Solar Air Heaters, Solar Energy, Vol. 99, pp. 231-245, 2014, https://doi.org/10.1016/j.solener.2013.11.012.

10.1016/j.solener.2013.11.012
19

Li, S., Karava, P., Savory, E., and Lin, W. E., Airflow and Thermal Analysis of Flat and Corrugated Unglazed Transpired Solar Collectors, Solar Energy, Vol. 91, pp. 297-315, 2013, https://doi.org/10.1016/j.solener.2013.01.028.

10.1016/j.solener.2013.01.028
20

Liang, Y., Janorschke, M., and Hayes, C. E., Low-Cost Solar Collectors to Pre-Heat Ventilation Air in Broiler Houses, Energies, Vol. 15, pp. 1-9, 2022, https://doi.org/10.3390/en15041468.

10.3390/en15041468
21

Poole, M. R., Shah, S. B., Grimes, J. L., Boyette, M. D., and Stikeleather, L. F., Evaluation of a Novel, Low-cost Plastic Solar Air Heater for Turkey Brooding, Energy for Sustainable Development, Vol. 45, pp. 1-10, 2018, https://doi.org/10.1016/j.esd.2018.04.004.

10.1016/j.esd.2018.04.004
22

Kim, P. K., The Fundamental Researches to Evaluate PVT Module Performance, Journal of the Korean Solar Energy Society, Vol. 38, No. 4, pp. 1-9, 2018, https://doi.org/10.7836/kses.2018.38.4.001.

10.7836/kses.2018.38.4.001
23

KIMO Instruments, Data Sheet - Debimo Air Flow Measurement Blades, 2024. https://www.kimocorea.com/sub/product/measuring/view.asp?p_cate=101121&p_idx=139. last accessed on the 3th December 2024.

24

Ansys Fluent User's Guide, Ansys Inc., PA, USA, 2023.

25

Shin, J. H. and Boo, J. H., A Numerical Study on the Thermal Performance of a Solar Air Heater Depending on the Hole Configuration and Geometry in the Absorber Plate, Journal of the Korean Solar Energy Society, Vol. 35, No. 1, pp. 69-80, 2015, https://doi.org/10.7836/kses.2015.35.1.069.

10.7836/kses.2015.35.1.069
26

Moon, B. E., Lee, M. H., Kim, H. T., Choi, T. H., Kim, Y. B., Ryou, Y. S., and Kim, H. T., Evaluation of Thermal Performance through Development of an Unglazed Transpired Collector Control System in Experimental Pig Barns, Solar Energy, Vol. 157, pp. 201-215, 2017, https://doi.org/10.1016/j.solener.2017.08.026.

10.1016/j.solener.2017.08.026
Information
  • Publisher :Korean Solar Energy Society
  • Publisher(Ko) :한국태양에너지학회
  • Journal Title :Journal of the Korean Solar Energy Society
  • Journal Title(Ko) :한국태양에너지학회 논문집
  • Volume : 45
  • No :2
  • Pages :47-62
  • Received Date : 2025-03-17
  • Revised Date : 2025-04-01
  • Accepted Date : 2025-04-04
  • DOI :https://doi.org/10.7836/kses.2025.45.2.047
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