Abstract
This communication presents the comparative experimental study of solar cookers based on the exergy analysis. In this study two different types of solar cookers viz. paraboloid type and box type have been evaluated using exergy analysis. The experiments have been carried out with cookers filled with different volume of water viz. one and two liters along with the suitable quantity of rice. Data of temperatures and solar radiation have been measured for different food stuff on clear sky day of the month. It is found that the exergy efficiency increases as the volume of water increases, however, the exergy efficiency of paraboloid solar cooker is found to be higher than that of the box-type solar cooker for all the cases mentioned above. However, it is also found that the exergy efficiency vary with the cooking stuff and water which is due to the fact that the requirement of heating vary with the food stuff.
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Abbreviations
- A sc :
-
Area of collector (m2)
- C pw :
-
Specific heat of water (kJ/kg-K)
- I b :
-
Beam radiation (W/m2)
- I d :
-
Direct radiation (W/m2)
- m w :
-
Mass of water (kg)
- T a :
-
Ambient temperature (°C)
- T s :
-
Sun temperature (°C)
- \( T_{s}^{*} \) :
-
Effective diffuse radiation temperature (°C)
- T wi :
-
Initial water temperature (°C)
- T wf :
-
Final water temperature (°C)
- ε:
-
Thermal exergy at temperature T
- ε(T i):
-
Thermal exergy at temperature T i
- \( \Upxi_{o} \) :
-
Exergy output (W/m2)
- \( \Upxi_{i} \) :
-
Exergy input (W/m2)
- ηex :
-
Exergy efficiency
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One of the authors (AKP) highly appreciates the financial assistance due to Ministry of New & Renewable Energy, New Delhi, Government of India.
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Pandey, A.K., Tyagi, V.V., Park, S.R. et al. Comparative experimental study of solar cookers using exergy analysis. J Therm Anal Calorim 109, 425–431 (2012). https://doi.org/10.1007/s10973-011-1501-1
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DOI: https://doi.org/10.1007/s10973-011-1501-1