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Hunashikatti, Praveen T.
- Development of Desalination Unit Using Solar still Coupled with Evacuated Tubes for Domestic Use in Rural Areas
Abstract Views :280 |
PDF Views:104
Authors
Affiliations
1 School of Renewable Energy and Efficiency, National Institute of Technology, Kurukshetra 136 119, IN
2 Department of Civil Engineering, B.M.S. College of Engineering, Bangalore 560 019, IN
3 Department of Mechanical Engineering, National Institute of Technology, Kurukshetra 136 119, IN
1 School of Renewable Energy and Efficiency, National Institute of Technology, Kurukshetra 136 119, IN
2 Department of Civil Engineering, B.M.S. College of Engineering, Bangalore 560 019, IN
3 Department of Mechanical Engineering, National Institute of Technology, Kurukshetra 136 119, IN
Source
Current Science, Vol 107, No 10 (2014), Pagination: 1683-1693Abstract
Potable water and energy are two main priorities of mankind. The rural communities, especially of developing and under-developed countries are facing acute shortage of both. A sustainable, domestic water desalination process for rural India to meet the demand for potable water is the need of the hour and solar thermal desalination proves to be a promising alternative. In this article, experimental studies of single-slope, single-basin solar still integrated with evacuated tubes in natural mode (coupled system) are carried out for the climatic conditions of Bangalore (12.96°N, 77.56°E), Karnataka, India. For solar still basin area of 0.51 m2, the distillate yields obtained from the coupled system for water depths of 0.06, 0.04 and 0.02 m are 3.289, 4.652 and 5.534 kg respectively, from 7:00 h to 19:00 h. The variation of instantaneous energy efficiency for the coupled system is found to be in the range 0.33-73.18% between 9:00 and 17:00 h for water depth of 0.02 m, which decreases with increase in water depth in the solar still. Chemical analysis of inlet water sample and outlet distillate was carried out and compared with Indian drinking water standards, IS-10500:2012. It is observed that the values for chemical composition of distillate are well below the limits of drinking water standards. The total cost of the developed coupled system was estimated to be Rs 6980 (US$ 1 = Rs 60.25 as on 15 April 2014). This eco-friendly system does not depend on any conventional source of energy for its operation and is easy to build and maintain.Keywords
Chemical Analysis, Coupled System, Distillate Yield, Energy Efficiency, Solar Thermal Desalination.Full Text
- Experimental studies on thin-layer drying of mint leaves in a solar dryer and under open sun
Abstract Views :161 |
PDF Views:81
Authors
Praveen T. Hunashikatti
1,
Suresh Ramaswwamyreddy
2,
Prerak M. Sethia
1,
Shikhar Goyal
1,
S. K. Rohan
1,
Shravan Raj
1
Affiliations
1 Department of Mechanical Engineering, B.M.S. College of Engineering, Bull Temple Road, Bengaluru 560 019, IN
2 Department of Civil Engineering, B.M.S. College of Engineering, Bull Temple Road, Bengaluru 560 019, IN
1 Department of Mechanical Engineering, B.M.S. College of Engineering, Bull Temple Road, Bengaluru 560 019, IN
2 Department of Civil Engineering, B.M.S. College of Engineering, Bull Temple Road, Bengaluru 560 019, IN
Source
Current Science, Vol 122, No 9 (2022), Pagination: 1066-1071Abstract
Thin layer drying behaviour of mint leaves was experimentally studied using a domestic, direct-type, natural convection solar drying unit and compared with traditional open sun drying. The experiments were conducted in Bengaluru (12.96°N, 77.56°E), Karnataka, India and the effect of various parameters on drying was studied. Drying time using the solar drying unit was compared with traditional open sun drying. Reduction in drying time was found using the solar drying unit compared to open sun drying. After 10 h, the moisture in the mint leaves was observed to reduce from 93% to 8.33% in the solar drying unit and to 26.6% under open sun drying conditions. The drying data were analysed and curve-fitting was done using five thin-layer drying models. Among these models, logarithmic model for solar drying unit and the Henderson and Pabis model for open sun drying were found to satisfactorily describe the drying kinetics of mint leaves.Keywords
Drying time, mint leaves, open sun drying, solar dryer, thin layer drying models.Full Text
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