AIMS Energy, 2019, 7(6): 957-970. doi: 10.3934/energy.2019.6.957.

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Design and experimental investigation of solar cooker with thermal energy storage

1 School of Mechanical and Industrial Engineering, Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia
2 School of Mechanical and Industrial Engineering, Debre Markos Institute of Technology, Debre Markos University, Debre Markos, Ethiopia

Solar cookers can be of great use in saving fuel and enabling in eco-friendly cooking of food. Solar energy is available during daytime only and also intermittent. So, thermal energy storage is very important for indoor solar cooking requirements and will ensure continuity utilization. The overall system is designed theoretically to cook 1 kg of rice in 45 minutes requiring the power of 421 W which is obtained from the stored energy from the sun. As it is shown in the experimental result, due to so many losses, the energy transfer to the water reduced to some extent and its temperature reaches 355 K. Even if it has low energy, it is possible to reduce energy of TES to the surrounding by placing it in the insulated tank during discharging. However, there is a variation between experiment and analytic calculation because the model did not account the basic losses and variation of solar radiation. The discharging of TES is started after it is lifted from solar collector but immediately it is placed on the insulated tank and loaded by the pot with water. Thus, the maximum temperature of water reached after 40 minutes is 355 K.
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Keywords solar collector; solar cooker; thermal energy storage (TES)

Citation: Muluken Biadgelegn Wollele, Abdulkadir Aman Hassen. Design and experimental investigation of solar cooker with thermal energy storage. AIMS Energy, 2019, 7(6): 957-970. doi: 10.3934/energy.2019.6.957

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