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Designing and testing a solar cooker for remote areas [electronic resource].

By:

Hassan, M. A

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Language: English Summary language: Arabic Description: p.593- 610Other title:

تصميم واختبار طباخ شمسى مناسب للمناطق النائية [Added title page title]

Uniform titles:

Misr Journal of Agricultural Engineering, 2007 v.24 (3) [electronic resource].

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Full Text Article.

In: Misr Journal of Agricultural Engineering 2007.v.24(3)Summary: The design philosophy, construction and thermal performance tests of a solar cooker for single and double glass cover with or without reflector are presented. A simple experimental box-type solar cooker is made of locally available materials. The absorber plate is made of 1 mm iron sheet in trapezoidal shape and painted with matt black paint. Commercially available (3 and 5 mm) thick glass is used as glazing material. The outer frame is made of soft wood and glass wool was inserted between the casing and the absorber for insulation. The plane reflector was made of a commercially available specular plane mirror. Provision is made for one cooking vessel, capable of holding up to 3 kg of water. The obtained results were employed to calculate the two figures of merit (F1 and F2), the overall and utilization thermal efficiencies (η and ηu) and the required time for cooking different types of food and boiling a known quantity of water. The absorber plate stagnation temperatures increased from 113°C to 133°C and from 132°C to 144°C without and with reflector for single and double glass cover, respectively. The required time for boiling water was reduced by using the reflector while steam condensation reduced by using the tight cooking pot. The values of (ηu) and F2 increased when the load increased. Finally, the results illustrated that the cooker has a good reliability for cooking food and boiling water (limited quantities of food and water).

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The design philosophy, construction and thermal performance tests of a solar cooker for single and double glass cover with or without reflector are presented. A simple experimental box-type solar cooker is made of locally available materials. The absorber plate is made of 1 mm iron sheet in trapezoidal shape and painted with matt black paint. Commercially available (3 and 5 mm) thick glass is used as glazing material. The outer frame is made of soft wood and glass wool was inserted between the casing and the absorber for insulation. The plane reflector was made of a commercially available specular plane mirror. Provision is made for one cooking vessel, capable of holding up to 3 kg of water. The obtained results were employed to calculate the two figures of merit (F1 and F2), the overall and utilization thermal efficiencies (η and ηu) and the required time for cooking different types of food and boiling a known quantity of water. The absorber plate stagnation temperatures increased from 113°C to 133°C and from 132°C to 144°C without and with reflector for single and double glass cover, respectively. The required time for boiling water was reduced by using the reflector while steam condensation reduced by using the tight cooking pot. The values of (ηu) and F2 increased when the load increased. Finally, the results illustrated that the cooker has a good reliability for cooking food and boiling water (limited quantities of food and water).

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