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Mitigating Climate Change by The Development and Deployment of Solar water Heating Systems

Wara, S.T. and Abe, S. E. (2012) Mitigating Climate Change by The Development and Deployment of Solar water Heating Systems. In: MITIGATION AND ADOPTION TO CLIMATE CHANGE; SOCIAL ECONOMIC AND ENGINEERING PERSPECTIVES, 6-8 December, 2012, Naura Spring Hotel, Arusha, Tanzania .

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Solar energy is becoming an alternative for the limited fossil fuel resources. One of the simplest and most direct applications of this energy is the conversion of solar radiation into heat, which can be used in water heating systems. A commonly used solar collector is the flat-plate. A lot of research has been conducted in order to analyse the flat-plate operation and improve its efficiency. Conventional methods of water heating with hot plates, gas burners, paraffin stoves, sawdust cookers, coal burners, firewood burners release C02 into the atmosphere and other pollutants. This study presents an alternative way of heating water using solar radiation thus optimizing fully the solar renewable energy which is eco - friendly. Ogun State in Nigeria was used ss a case study. The solar radiation for the state was explored with an annual average of 4. 775 kWhlm2/day recorded. The designed system comprised storage tanks (Inlet and Outlet) and the collector unit which comprises wooden casing (35.375 x 17.25cm), copper tube (9 meters long and 0.5mm~ in diameter), and aluminium foil (33 x 17cm). Test result for the unlagged and lagged storage tank for water temperature at various angles of inclination (2.5° - 20.0°) were on the average 27.8oC and 28.3°Crespectively for the inlet temperature and 60.1oC and 63.0°C for the outlet temperature respectively. Also, the outlet temperature increased as the angle of inclination increased with angle 15° (angle of inclination for optimum insolation) having the highest outlet temperature of 64°C. Beyond 15°, the outlet temperature decreased. At an angle of 15°, the efficiency of the SWHS was 72.5% and the power saved 2. 7985kW. The cost of the unit is put at N21,400 ($145) as at August, 2012. In the area of agriculture, this Solar Water Heating System (SWHS) can provide hot water for pen cleaning. In diary operations, it can be used to provide heated water to clean or sterilize equipment and to warm and stimulate cows' udders. The unit developed can be applied for the purpose of reducing the cost of energy, dealing with environmental challenges and improving the use of energy (management and efficiency) hence serving as a climate mitigation process as this can be extended for water heating for domestic and other industrial purposes

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: SWHS, Insolation, Renewable energy, Climate change mitigation
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 31 May 2015 19:44
Last Modified: 31 May 2015 19:44

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