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Heat transfer analysis of north wall insulated greenhouse dryer under natural convection mode

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  • Chauhan, Prashant Singh
  • Kumar, Anil

Abstract

A North wall insulated greenhouse dryer was designed, fabricated and tested in no-load conditions under natural convection mode. Experiments were carried out in two different cases namely-Case-I and Case-II. Case-I was north wall insulated greenhouse dryer with solar air heating collector at ground and Case-II is north wall insulated greenhouse dryer without solar air heating collector. Convective heat transfer coefficient, coefficient of diffusivity, heat loss factor, heat utilisation factor and coefficient of performance were evaluated and analysed as performance indicators for newly developed system. The maximum value of coefficient of performance for Case-I was 0.9 whereas 0.86 for case-II. The highest heat utilisation factor was 0.68 for Case-I while 0.61 for Case-II. The maximum temperature difference between inside room air and ambient air for the north wall insulated greenhouse dryer with the solar collector was 30 °C, 28 °C and 18 °C for day 1, day 2 and day 3, respectively. The inside room air temperature is 46%, 42% and 32% higher than the ambient air temperature during day 1, day 2 and day 3, respectively. The results validate the modifications, hence developed system is recommended for fruit/vegetable drying.

Suggested Citation

  • Chauhan, Prashant Singh & Kumar, Anil, 2017. "Heat transfer analysis of north wall insulated greenhouse dryer under natural convection mode," Energy, Elsevier, vol. 118(C), pages 1264-1274.
    • Handle: RePEc:eee:energy:v:118:y:2017:i:c:p:1264-1274
    DOI: 10.1016/j.energy.2016.11.006
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    References listed on IDEAS

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    1. Singh Chauhan, Prashant & Kumar, Anil & Tekasakul, Perapong, 2015. "Applications of software in solar drying systems: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 51(C), pages 1326-1337.
    2. Fudholi, Ahmad & Sopian, Kamaruzzaman & Bakhtyar, B. & Gabbasa, Mohamed & Othman, Mohd Yusof & Ruslan, Mohd Hafidz, 2015. "Review of solar drying systems with air based solar collectors in Malaysia," Renewable and Sustainable Energy Reviews, Elsevier, vol. 51(C), pages 1191-1204.
    3. Prakash, Om & Kumar, Anil, 2014. "Solar greenhouse drying: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 29(C), pages 905-910.
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    1. Tiwari, Sumit & Tiwari, G.N., 2017. "Energy and exergy analysis of a mixed-mode greenhouse-type solar dryer, integrated with partially covered N-PVT air collector," Energy, Elsevier, vol. 128(C), pages 183-195.
    2. Tiwari, Sumit & Agrawal, Sanjay & Tiwari, G.N., 2018. "PVT air collector integrated greenhouse dryers," Renewable and Sustainable Energy Reviews, Elsevier, vol. 90(C), pages 142-159.
    3. Singh, Pushpendra & Shrivastava, Vipin & Kumar, Anil, 2018. "Recent developments in greenhouse solar drying: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 3250-3262.
    4. Singh, Sukhmeet & Gill, R.S. & Hans, V.S. & Mittal, T.C., 2022. "Experimental performance and economic viability of evacuated tube solar collector assisted greenhouse dryer for sustainable development," Energy, Elsevier, vol. 241(C).
    5. Wang, XiaoLong & Sun, GuoChen & Zhang, LinHua & Lei, WenJun & Zhang, WenKe & Li, HaoYi & Zhang, ChunYue & Guo, JingChenxi, 2023. "Application of green energy in smart rural passive heating: A case study of indoor temperature self-regulating greenhouse of winter in Jinan, China," Energy, Elsevier, vol. 278(C).
    6. Asim Ahmad & Om Prakash & Anil Kumar & Rajeshwari Chatterjee & Shubham Sharma & Vineet Kumar & Kushagra Kulshreshtha & Changhe Li & Elsayed Mohamed Tag Eldin, 2022. "A Comprehensive State-of-the-Art Review on the Recent Developments in Greenhouse Drying," Energies, MDPI, vol. 15(24), pages 1-42, December.
    7. Saberian, Ayad & Sajadiye, Seyed Majid, 2019. "The effect of dynamic solar heat load on the greenhouse microclimate using CFD simulation," Renewable Energy, Elsevier, vol. 138(C), pages 722-737.
    8. Shiva Gorjian & Behnam Hosseingholilou & Laxmikant D. Jathar & Haniyeh Samadi & Samiran Samanta & Atul A. Sagade & Karunesh Kant & Ravishankar Sathyamurthy, 2021. "Recent Advancements in Technical Design and Thermal Performance Enhancement of Solar Greenhouse Dryers," Sustainability, MDPI, vol. 13(13), pages 1-32, June.
    9. Chauhan, Prashant Singh & Kumar, Anil & Nuntadusit, Chayut & Banout, Jan, 2018. "Thermal modeling and drying kinetics of bitter gourd flakes drying in modified greenhouse dryer," Renewable Energy, Elsevier, vol. 118(C), pages 799-813.

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