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| dc.contributor.author | Mulat, Shitye Alem | |
| dc.date.accessioned | 2022-11-23T11:20:44Z | |
| dc.date.available | 2022-11-23T11:20:44Z | |
| dc.date.issued | 2022-02 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/14540 | |
| dc.description.abstract | Global warming as a result of greenhouse gas emissions is a hot topic that has been discussed repeatedly. Traditional cooking methods are a source of greenhouse gas emissions, which also contribute to deforestation. Researchers are actively exploring for a renewable and sustainable solution to replace this conventional cooking process in order to address these and other related issues. Among the different renewable energy sources, solar energy is a promising and practical option. Solar cookers are devices that utilize the thermal energy obtained from the sun to cook, boil, fry, or roast different kinds of foods either directly or indirectly. In this study, a solar cooker based on a parabolic dish concentrator is designed, manufactured, and tested by using sunflower oil as a heat transfer fluid and solar salt (60% NaNO3 and 40% KNO3) mixture as a latent heat storage material. After the design, the aperture area of the parabola concentrator was found to be 1.4 m 2 . The experimental test was conducted on December 22nd, 23rd, and 24th, 2021. The testing included a no-load test, a load test, a food cooking test, and a solar salt charging and discharging test. The standard stagnation temperature within the cooking pot and the solar cooker's first figure of merit were 189.6°C and 0.22, respectively, according to the no-load test. As per the load test, the solar cooker's average interval cooking power, standardized cooking power, and second figure of merit are 113.89 W, 131.17 W, and 0.647, respectively. Furthermore, the overall energy and exergy efficiency of the solar cooker have been found to be 12.8% and 0.23% respectively. The solar cooker was able to cook 0.5 kg of rice with one liter of water in 120 minutes (2 hrs.). On the other hand, a charging and discharging test of solar salt was conducted, and it was able to charge 5 kg of solar salt in 200 minutes (3 hours and 20 minutes) until the temperature of the salt reached 230 o C. 330 minutes (5 hours and 30 minutes) were required to discharge the solar salt from the temperature of 230 o C to a temperature of 100 o C with a load of 2 liters of water. This water starts to boil after 250 minutes. In general from the study, it can be concluded that indoor solar cooking integrated with solar salt and sunflower oil as a heat transfer fluid shows a sound and a promising result. Key words: solar cooker, sunflower oil (HTF), parabolic dish concentrator, solar salt, stagnation test. | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | Mechanical and Industrial Engineering | en_US |
| dc.title | DESIGN, MANUFACTURING AND EXPERIMENTAL INVESTIGATION OF SOLAR COOKER USING PARABOLIC DISH- COLLECTOR WITH A THERMAL ENERGY STORAGE SYSTEM FOR INDOOR COOKING APPLICATION. | en_US |
| dc.type | Thesis | en_US |
