Performance assessment of a magnesium chloride saturated solar pond |
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| Affiliation: | 1. Department of Mechanical Engineering, Faculty of Engineering, University of Adiyaman, Adiyaman 02040, Turkey;2. Department of Physics, Faculty of Sciences and Letters, University of Cukurova, Adana 01330, Turkey;3. Faculty of Engineering and Applied Science, University of Ontario Institute of Technology (UOIT), 2000 Simcoe Street, North Oshawa, Ontario L1H 7K4, Canada;1. Grupo de Investigación IDEA, Departamento de Ingeniería Electrónica y Automática, Escuela Politécnica Superior, Universidad de Jaén, Campus de Las Lagunillas, s/n, 23071 Jaén, Spain;2. Departamento de Física Aplicada II, Universidad de Málaga, Louis Pasteur 35, 29071 Málaga, Spain;3. DIGITS, Department of Computer Technology, De Montfort University, The Gateway, LE1 9BH Leicester, UK;1. Department of Industrial and Energy Engineering, Egerton University, Kenya;2. Department of Biological Sciences, Egerton University, Kenya;3. Department of Agricultural Engineering, Egerton University, Kenya;1. Department of Biomass, CTAER Foundation, Scientific and Technology Park, GEOLIT, Jaén, Spain;2. NIRSoluciones, S.L., Rabanales 21 Science and Technology Park, Córdoba, Spain;3. Department of Rural Engineering, School of Agricultural and Forestry Engineering, Campus de Excelencia Internacional agroalimentario ceiA3, University of Córdoba, Spain |
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| Abstract: | This paper deals with the experimental investigation of a magnesium chloride saturated solar pond and its performance evaluation through energy and exergy efficiencies. The solar pond system is filled with magnesium chloride containing water to form layers with varying densities. A solar pond generally consists of three zones, and the densities of these zones increase from the top convective zone to the bottom storage zone. The incoming solar radiation is absorbed by salty water (with magnesium chloride) which eventually increases the temperature of the storage zone. The high-temperature salty water at the bottom of the solar pond remains much denser than the salty water in the upper layers. Thus, the convective heat losses are prevented by gradient layers. The experimental temperature changes of the solar pond are measured by using thermocouples from August to November. The densities of the layers are also measured and analysed by taking samples from at the same point of the temperature sensors. The energy and exergy content distributions are determined for the heat storage zone and the non-convective zone. The maximum exergy destructions and losses appear to be 79.05 MJ for the heat storage zone and 175.01 MJ for the non-convective zone in August. The energy and exergy efficiencies of the solar pond are defined as a function of solar radiation and temperatures. As a result, the maximum energy and exergy efficiencies are found to be 27.41% and 26.04% for the heat storage zone, 19.71% and 17.45% for the non-convective zone in August, respectively. |
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| Keywords: | Magnesium chloride Solar pond Heat storage Energy Exergy Efficiency |
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