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A study on the solar energy storing rock-bed to heat a polyethylene tunnel type greenhouse

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  • Kürklü, Ahmet
  • Bilgin, Sefai
  • Özkan, Burhan

Abstract

A study was conducted to store solar energy in an underground rock-bed for greenhouse heating. Experiments were carried out in two identical polyethylene tunnel type greenhouses, each with 15 m2 ground area. Rocks were filled in two canals excavated and insulated in the soil of one of the greenhouses. Greenhouse air was pushed through the rock-bed by a centrifugal fan with 1100 m3/h air flow rate and controlled by two thermostats when the energy storage or release was required. No crops were grown in the greenhouses and the vents were kept closed unless excessive condensation occurrence inside the greenhouses. The results of this study showed that the rock-bed system created an air temperature difference of about 10 °C at night, between the two greenhouses, the control one having the lower temperature. Furthermore, the rock-bed system kept the inside air temperature higher than that of outside air at night, even in an overcast day following a clear day. Whilst solar energy collection efficiency of the system was 34%, its energy recovery or release efficiency was higher than 80%. A numerical mathematical model considered here represented actual data well. An economic analysis indicated that the rock-bed system is more economical than the LPG or petroleum-based fuel burning heating systems widely used in Turkish greenhouses.

Suggested Citation

  • Kürklü, Ahmet & Bilgin, Sefai & Özkan, Burhan, 2003. "A study on the solar energy storing rock-bed to heat a polyethylene tunnel type greenhouse," Renewable Energy, Elsevier, vol. 28(5), pages 683-697.
    • Handle: RePEc:eee:renene:v:28:y:2003:i:5:p:683-697
    DOI: 10.1016/S0960-1481(02)00109-X
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    References listed on IDEAS

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    1. Bouhdjar, A. & Belhamel, M. & Belkhiri, F.E. & Boulbina, A., 1996. "Performance of sensible heat storage in a rockbed used in a tunnel greenhouse," Renewable Energy, Elsevier, vol. 9(1), pages 724-728.
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    Cited by:

    1. Canakci, Murad & Yasemin Emekli, N. & Bilgin, Sefai & Caglayan, Nuri, 2013. "Heating requirement and its costs in greenhouse structures: A case study for Mediterranean region of Turkey," Renewable and Sustainable Energy Reviews, Elsevier, vol. 24(C), pages 483-490.
    2. Kurpaska, S. & Latala, H., 2010. "Energy analysis of heat surplus storage systems in plastic tunnels," Renewable Energy, Elsevier, vol. 35(12), pages 2656-2665.
    3. Zhang, Donghai & Gao, Penghui & Zhou, Yang & Wang, Yijiang & Zhou, Guoqing, 2020. "An experimental and numerical investigation on temperature profile of underground soil in the process of heat storage," Renewable Energy, Elsevier, vol. 148(C), pages 1-21.
    4. Chrysanthos Maraveas & Christos-Spyridon Karavas & Dimitrios Loukatos & Thomas Bartzanas & Konstantinos G. Arvanitis & Eleni Symeonaki, 2023. "Agricultural Greenhouses: Resource Management Technologies and Perspectives for Zero Greenhouse Gas Emissions," Agriculture, MDPI, vol. 13(7), pages 1-46, July.
    5. Kamil Salihoglu, Nezih & Pinarli, Vedat & Salihoglu, Guray, 2007. "Solar drying in sludge management in Turkey," Renewable Energy, Elsevier, vol. 32(10), pages 1661-1675.
    6. Joudi, Khalid A. & Farhan, Ammar A., 2014. "Greenhouse heating by solar air heaters on the roof," Renewable Energy, Elsevier, vol. 72(C), pages 406-414.
    7. Chen, Wei & Liu, Wei, 2006. "Numerical simulation of the airflow and temperature distribution in a lean-to greenhouse," Renewable Energy, Elsevier, vol. 31(4), pages 517-535.
    8. Gourdo, L. & Fatnassi, H. & Tiskatine, R. & Wifaya, A. & Demrati, H. & Aharoune, A. & Bouirden, L., 2019. "Solar energy storing rock-bed to heat an agricultural greenhouse," Energy, Elsevier, vol. 169(C), pages 206-212.

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