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Evaluating the optimum load range for box-type solar cookers

Author

Listed:
  • Mahavar, S.
  • Rajawat, P.
  • Punia, R.C.
  • Sengar, N.
  • Dashora, P.

Abstract

This paper introduces a new concept of Optimum Load Range (OLR) for solar cookers. OLR gives the load values for which cooker preferably shows good thermal as well as good cooking performance; it may be considered a crucial parameter for solar cookers. This OLR concept is based on the dependence of rate of rise of load temperature on different heat transfer processes between load and cooker interior. This concept illustrates solar cooking in two simple steps. The total time required to complete these steps puts an essential constraint for cooking of any load amount. The maximum value of load (upper limit of OLR) till which cooker shows satisfactory cooking may be determined from this constraint. This constraint requires determination of two OLR parameters which are tstep I and tstep II. The load for which cooker remain almost 30% efficient, may be referred as lower limit (minimum value) of OLR. For the verification of OLR, experimental studies have been conducted with a solar cooker named SFSC. The OLR parameters along with different thermal performance parameters (TPPs) (second figure of merit (F2), utilization efficiency (ηu) etc.) suggested by different researches for solar cookers in water load condition have been computed from the measured thermal profiles of different loads (0.8–3.0 kg). From the curve analysis of different TPPs with load, the existence of upper limit of OLR is observed. The values of rate of rise of load temperature at water temperatures 80, 85 and 90 °C for different loads also confirm the same. The OLR of SFSC is found to be 1.2–1.6 kg.

Suggested Citation

  • Mahavar, S. & Rajawat, P. & Punia, R.C. & Sengar, N. & Dashora, P., 2015. "Evaluating the optimum load range for box-type solar cookers," Renewable Energy, Elsevier, vol. 74(C), pages 187-194.
    • Handle: RePEc:eee:renene:v:74:y:2015:i:c:p:187-194
    DOI: 10.1016/j.renene.2014.08.003
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    References listed on IDEAS

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    Cited by:

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    3. Herez, Amal & Ramadan, Mohamad & Khaled, Mahmoud, 2018. "Review on solar cooker systems: Economic and environmental study for different Lebanese scenarios," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 421-432.
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    5. Tawfik, M.A. & Sagade, Atul A. & El-Sebaii, A.A. & Khallaf, A.M. & El-Shal, Hanan M. & Abd Allah, W.E., 2024. "Enabling sustainability in the decentralized energy sector through a solar cooker augmented with a bottom parabolic reflector: Performance modelling and 4E analyses," Energy, Elsevier, vol. 287(C).
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    7. Aramesh, Mohamad & Ghalebani, Mehdi & Kasaeian, Alibakhsh & Zamani, Hosein & Lorenzini, Giulio & Mahian, Omid & Wongwises, Somchai, 2019. "A review of recent advances in solar cooking technology," Renewable Energy, Elsevier, vol. 140(C), pages 419-435.
    8. Mahavar, S. & Sengar, N. & Dashora, P., 2017. "Analytical model for electric back-up power estimation of solar box type cookers," Energy, Elsevier, vol. 134(C), pages 871-881.
    9. Koshti, Bhupendra & Dev, Rahul & Bharti, Ajaya & Narayan, Audhesh, 2023. "Comparative performance evaluation of modified solar cookers for subtropical climate conditions," Renewable Energy, Elsevier, vol. 209(C), pages 505-515.

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