Development and Experimental Testing of Thermal Storage System for Solar Parabolic Dish Concentrator
| dc.contributor.advisor | Solomon, Tesfamariam (PhD) | |
| dc.contributor.author | Melaku, Wolde | |
| dc.date.accessioned | 2020-12-02T06:48:39Z | |
| dc.date.accessioned | 2023-11-04T15:23:15Z | |
| dc.date.available | 2020-12-02T06:48:39Z | |
| dc.date.available | 2023-11-04T15:23:15Z | |
| dc.date.issued | 2020-05 | |
| dc.description.abstract | Ethiopia is one of the developing countries in the world, about 79.4% of people live in the rural area and 55.7 % live without electricity. Peoples who live in a rural area mostly use firewood for cooking and heating purpose. Renewable energy sources can be used as alternatives to substitute the firewood in rural areas. Parabolic dish solar collector has a relatively bigger aperture area to focus the solar rays in the limited receiver space and delivers high temperatures. This study deals with the development and experimentation of thermal storage system for solar parabolic dish concentrator. A phase change material, magnesium chloride hexahydrate was used to store the thermal energy since it is easily available in the local market. The heater (receiver) is portable because it can be easily dismounted from the collector. During sunshine it can be used as it is, whereas after sunset the receiver can be easily dismantled from the dish and kept indoor with an insulting vessel to minimize heat loss from the receiver’s outer surface. The aperture area of the parabolic dish is 0.2160 m2. The space occupied by the cylindrical phase change material container is 0.003083 m3. The volume of the phase change material is 0.002853 m3. Rod type fins are integrated to enhance heat transfer. To minimize heat loss by convection the storage system has glazing material. The glazing (cover) minimized the heat loss by 10.1%. The phase change material was heated up to 119oC. This ensures that the phase change material was completely melted since its melting point was not exceeding 117oC. One litter of water was heat from 22oC to 92oC. The overall efficiency of the concentrator is 75.9 % with the glazing system and 65.9 % without glazing system. As compared to the reviewed results of other researchers with similar aperture area of box type solar cooker, 400 g of water was heated from 25 oC to 78 oC with in the time of 2 hours. But in this research 1000 g of water was heated from 22 oC to 92 oC with in 2.67 hours. Hence, parabolic dish solar water heater with storage and glazing systems may comfortably be used in rural areas to warm food and boil water. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/123456789/23796 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Solar energy | en_US |
| dc.subject | solar water heater | en_US |
| dc.subject | parabolic dish type solar water heater | en_US |
| dc.subject | thermal storage and glazing system | en_US |
| dc.subject | performance of water heater | en_US |
| dc.title | Development and Experimental Testing of Thermal Storage System for Solar Parabolic Dish Concentrator | en_US |
| dc.type | Thesis | en_US |