Combined effects of composite thermal energy storage and magnetic field to enhance productivity in solar desalination

The conventional solar still is limited to a daily yield of approximately 2–3.5 kg/m2/day. To increase the yield, this study investigates experimentally the combined effects of latent and sensible energy storage together with magnetization. Paraffin and novel high-thermal conductivity nanomaterial (...

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Bibliographic Details
Published in:	Renewable energy Vol. 181; pp. 219 - 234
Main Authors:	Dsilva Winfred Rufuss, D., Arulvel, S., Anil Kumar, V., Davies, P.A., Arunkumar, T., Sathyamurthy, Ravishankar, Kabeel, A.E., Anand Vishwanath, M., Sai Charan Reddy, D., Dutta, Amandeep, Agrawal, Mayank, Vilas Hiwarkar, Vedant
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-01-2022
Subjects:	Composite thermal energy storage Ferrite magnets Graphite plate-paraffin Modified still Productivity Techno-enviro-economical Productivity Graphite plate-paraffin Composite thermal energy storage Modified still Ferrite magnets Techno-enviro-economical
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Summary:	The conventional solar still is limited to a daily yield of approximately 2–3.5 kg/m2/day. To increase the yield, this study investigates experimentally the combined effects of latent and sensible energy storage together with magnetization. Paraffin and novel high-thermal conductivity nanomaterial (graphite plate) were used as latent and sensible heat storage materials, respectively. There was an overall increase of 62% and 235% in the daytime and night-time yield, respectively, giving a total yield of 5.5 kg/m2/day compared to 3.4 kg/m2/day for a conventional still. Enviro-economic parameters like emissions, CO2 mitigation and carbon credit (CC) earned were also investigated. Energy matrices analysis and water quality checks were performed to estimate the energy-payback time, life cycle conversion efficiency (LCCE) and purity of desalinated water. The cost per liter of freshwater was found to be 3.7% cheaper than for a conventional still and 69% cheaper than bottled water in India. Over a 30 year period, 40.3 Tonnes of CO2 will be mitigated contributing a CC and LCCE of $402 and 0.52, respectively. The proposed modified still is recommended as a substitute for conventional stills and stills with simple energy storage. [Display omitted]
ISSN:	0960-1481 1879-0682
DOI:	10.1016/j.renene.2021.07.124