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Intensification of field plate collector used in vacuum membrane distillation of sea water.

Author(s) : SAID M., FRIKHA N., COMMENGE J. M., et al.

Summary

The objective of this work is to intensify the heat transfer and to reduce the power needed to pump in a field of solar collectors used to heat the seawater treated by a unit of vacuum membrane distillation. We studied the hydrodynamics of the solar collector by assimilating it to a network of resistive pipes and including laws of linear and singular head losses. We have developed computer programs established in the MATLAB calculation software based on different equations of thermal and hydrodynamic transfers. Through these programs we were able to calculate the flow rates in each tube network to study the impact of design on the quality of the distribution of the fluid. This model was also used to calculate the exchanged flows and fluid temperatures were compared with experimental measurements. Simulations have shown that a large number of tubes make it possible to increase the
flux exchanged but maldistribution of the fluid and the manufacturing cost of collector also increases. We have proposed a configuration comprising 7 tubes having a length of 1.83 m and a diameter of 2 cm, and a distributor with diameter of 5 cm. This improvement increases the operating efficiency of 27% and reduces pressure drop to 48 Pa by solar collector.

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  • Original title: Intensification of field plate collector used in vacuum membrane distillation of sea water.
  • Record ID : 30017594
  • Languages: English
  • Source: 1st International Refrigeration, Energy and Environment Colloquium. Proceedings: Hammamet, Tunisia, March 24-27, 2016.
  • Publication date: 2016/03/24

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