Improving the productivity of a falling film solar desalination unit

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This study aimed at improving the productivity of a falling film solar desalination unit by cooling the glass cover and by improving the hot surface wettability. The glass cover was made of double layers through which cooling water passes. The advantage of this design is that the latent heat of evaporation is absorbed by the cooling water and returned to the system. The effect of the various parameters such as feed water flow rate, cooling water flow rate, weather conditions, solar irradiation intensity, and collector’s surface area was investigated. The results showed that increasing the cooling water flow rate enhanced fresh water production. The productivity of the unit decreased with increasing feed water flow rate. Recycling the hot water to the feed water tank improved the productivity of the unit from 0.13 to 0.18 L/h (~34%). Fog formation on the double glass cover was found to reduce the productivity of the unit. Modifying the surface of the black plate with cotton cloth or with plastic strips improved the productivity by 50% (0.13–0.19 L/h).

Original languageEnglish
Pages (from-to)9602-9608
Number of pages7
JournalDesalination and Water Treatment
Volume57
Issue number21
DOIs
Publication statusPublished - May 2 2016

Fingerprint

Desalination
desalination
cooling water
Cooling water
Productivity
water flow
productivity
Flow rate
glass
Glass
Water
Water tanks
Latent heat
wettability
Fog
fog
Cotton
Wetting
Recycling
cotton

Keywords

  • Brackish water
  • Double glass cover
  • Evaporation/condensation
  • Falling film
  • Solar desalination

ASJC Scopus subject areas

  • Pollution
  • Water Science and Technology
  • Ocean Engineering

Cite this

Improving the productivity of a falling film solar desalination unit. / Mousa, Hasan; Al-Muhtaseb, Ala’a H.; Abu-Arabi, Mousa.

In: Desalination and Water Treatment, Vol. 57, No. 21, 02.05.2016, p. 9602-9608.

Research output: Contribution to journalArticle

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