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Thermo-hydraulic and exergy analysis of inclined impinging jets on absorber plate of solar air heater

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  • Maithani, Rajesh
  • Sharma, Sachin
  • Kumar, Anil

Abstract

The challenge of heat transfer enhancement in a solar heat collector has been experimentally investigated by impingement of the air jet at an angle on the heated surface in the current study. The present technique employs the main air supply pipe connected to the perforated branch pipes that can supply air at an inclined angle for the air jet delivery. This novel technique is prolific as it provides the ambient cool air to the entire absorber plate surface as well as the inclined air jet impinging on the heated absorber plate proliferates the heat transfer coefficient. The relative stream wise pitch, angle of attack, relative jet diameter and relative jet spacing have been selected in the range of 0.095–0.285, 15°-90°, 0.09–0.027 and 0.4–0.8, respectively. The mass flow rate ranges from 0.0128 to 0.0544 kg/s. The maximum thermohydraulic performance of 2.38 has been achieved at mass flow rate of 0.054 kg/s, and geometric parameters of relative stream wise pitch of 0.285, angle of attack of 60°, relative jet diameter of 0.18 and relative jet spacing of 0.6. Whereas maximum exergy efficiency of 2.9 has been accomplished and it has been observed that the idea of inclining the air jet is prolific for enhancing heat transfer.

Suggested Citation

  • Maithani, Rajesh & Sharma, Sachin & Kumar, Anil, 2021. "Thermo-hydraulic and exergy analysis of inclined impinging jets on absorber plate of solar air heater," Renewable Energy, Elsevier, vol. 179(C), pages 84-95.
    • Handle: RePEc:eee:renene:v:179:y:2021:i:c:p:84-95
    DOI: 10.1016/j.renene.2021.07.013
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    References listed on IDEAS

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    1. Hedayatizadeh, Mahdi & Sarhaddi, Faramarz & Safavinejad, Ali & Ranjbar, Faramarz & Chaji, Hossein, 2016. "Exergy loss-based efficiency optimization of a double-pass/glazed v-corrugated plate solar air heater," Energy, Elsevier, vol. 94(C), pages 799-810.
    2. Chauhan, Ranchan & Singh, Tej & Thakur, N.S. & Kumar, Nitin & Kumar, Raj & Kumar, Anil, 2018. "Heat transfer augmentation in solar thermal collectors using impinging air jets: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 3179-3190.
    3. Chauhan, Ranchan & Thakur, N.S., 2014. "Investigation of the thermohydraulic performance of impinging jet solar air heater," Energy, Elsevier, vol. 68(C), pages 255-261.
    4. Salman, Mohammad & Park, Myeong Hyeon & Chauhan, Ranchan & Kim, Sung Chul, 2021. "Experimental analysis of single loop solar heat collector with jet impingement over indented dimples," Renewable Energy, Elsevier, vol. 169(C), pages 618-628.
    5. Nadda, Rahul & Kumar, Anil & Maithani, Rajesh, 2018. "Efficiency improvement of solar photovoltaic/solar air collectors by using impingement jets: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 93(C), pages 331-353.
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    Cited by:

    1. Chaudhri, Kapil & Bhagoria, J.L. & Kumar, Vikash, 2022. "Transverse wedge-shaped rib roughened solar air heater (SAH) - Exergy based experimental investigation," Renewable Energy, Elsevier, vol. 184(C), pages 1150-1164.
    2. Patel, Shobhit K. & Parmar, Juveriya & Katkar, Vijay, 2022. "Graphene-based multilayer metasurface solar absorber with parameter optimization and behavior prediction using Long Short-Term Memory model," Renewable Energy, Elsevier, vol. 191(C), pages 47-58.
    3. Srivastav, Ayushman & Maithani, Rajesh & Sharma, Sachin, 2024. "Investigation of heat transfer and friction characteristics of solar air heater through an array of submerged impinging jets," Renewable Energy, Elsevier, vol. 227(C).

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