Increase in Distillate Productivity by Inclining the Flat Plate Reflector of a Tilted-Wick Solar Still in Summer

Hiroshi Tanaka

Abstract


Abstract: A tilted-wick solar still with a flat plate reflector inclined backwards is theoretically analysed to predict the distillate productivity of the still on a summer solstice day at 30oN latitude. We are proposing a new geometrical model to calculate the solar radiation reflected by the inclined reflector and then absorbed onto an evaporating wick. Using this method, we performed a numerical analysis of heat and mass transfer in the still in order to determine the effectiveness of the inclination of the reflector. We found that the benefit of a vertical flat plate reflector is negligible, while an inclined reflector can increase the distillate productivity of the still, and that the reflector angle should be set at about 20o backward from vertical on a summer solstice day. The benefit of the inclined reflector is less in summer than in winter, but the daily amount of distillate can be increased about 9% or 6% by using an inclined reflector when the length of the reflector is a half of the still’s length and the still’s angle is 10o or 30o.
Key words: Solar still; Solar distillation; Solar desalination; Tilted-wick; Reflector; Inclined; Summer

Keywords


Solar still; Solar distillation; Solar desalination; Tilted-wick; Reflector; Inclined; Summer

Full Text:

PDF

References


Malik, M. A. S., Tiwari, G. N., Kumar, A., & Sodha, M. S. (1982). Solar distillation(pp.98). UK: Pergamon Press Ltd..

Al-Karaghouli, A. A., & Minasian, A. N. (1995). A floating-wick type solar still. Renewable Energy, 6(1), 77-79.

El-Bahi, A., & Inan, D. (1999). Analysis of a parallel double glass solar still with separate condenser. Renewable Energy, 17, 509-521.

Tanaka, H., & Nakatake, Y. (2006). Theoretical analysis of a basin type solar still with internal and external reflectors. Desalination, 197, 205-216.

Tanaka, H., & Nakatake, Y. (2007). Improvement of the tilted wick solar still by using flat plate reflector. Desalination, 216, 139-146.

Tanaka, H., & Nakatake, Y. (2007). Effect of inclination of external flat plate reflector of basin type still in winter. Solar Energy, 81, 1035-1042.

Tanaka, H., & Nakatake, Y. (2009). Increase in distillate productivity by inclining the flat plate external reflector of a tilted-wick solar still in winter. Desalination, 242, 205-214.

Khalifa, A. J. N, & Ibrahim, H. A. (2009). Effect of inclination of the external reflector on the performance of a basin type solar still at various seasons. Energy for Sustainable Development, 13, 244-249.

Japan Solar Energy Society (2000). New solar energy utilization handbook (pp. 27). Tokyo: Nippon Publicity.

Elsayed, M. M. (1983). Comparison of transient performance predictions of a solar-operated diffusion-type still with a roof-type still. J. Solar Energy Engineering, Trans. ASME, 105, 23-28.

Tanaka, H., Nosoko, T., & Nagata, T. (2000). A highly productive basin-type – multiple-effect coupled solar still. Desalination, 130, 279-293.

Japan Solar Energy Society (1985). Solar energy utilization handbook (pp.20). Tokyo: Onkodo Press.




DOI: http://dx.doi.org/10.3968/j.est.1923847920110102.002

DOI (PDF): http://dx.doi.org/10.3968/g1604

Refbacks

  • There are currently no refbacks.


Copyright (c)



Share us to:   

Reminder

If you have already registered in Journal A and plan to submit article(s) to Journal B, please click the CATEGORIES, or JOURNALS A-Z on the right side of the "HOME".

We only use three mailboxes as follows to deal with issues about paper acceptance, payment and submission of electronic versions of our journals to databases: [email protected]; [email protected]; [email protected]

 Articles published in Energy Science and Technology are licensed under Creative Commons Attribution 4.0 (CC-BY).

 ENERGY SCIENCE AND TECHNOLOGY Editorial Office

Address: 1055 Rue Lucien-L'Allier, Unit #772, Montreal, QC H3G 3C4, Canada.
Telephone: 1-514-558 6138 
Website: Http://www.cscanada.net Http://www.cscanada.org 
E-mail: [email protected]; [email protected]

Copyright © 2010 Canadian Research & Development Centre of Sciences and Cultures