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Improvement of Surface Evaporation by Reducing the Heat Transfer to Fluid Bulk

Anjomrouz, Amin | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53618 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Nouri Boroujerdi, Ali; Hosseini, Vahid
  7. Abstract:
  8. In the leading thesis, an attempt is made to improve the evaporation rate by emphasizing the reduction of heat transfer to the fluid bulk. In this study, inspired by the process performed in plants in the transfer of water from the roots to the leaves and especially the function of plant vessels, a kind of evaporator-improving surface was designed. The general function of this surface is to prevent the heat radiated to the surface of the water from being spent on heating the fluid deep in the water, and by concentrating this heat in a thin layer of fluid on the surface, the rate of evaporation increases. This surface consists of three parts: evaporative layer, insulation and water suction fibers. After several studies on different materials to select the material of these three parts, expansion polystyrene insulation and fabric fibers showed the best performance. The innovative level designed after construction and testing was able to increase the mass of water evaporated in 24 hours by 28%. This level also increased the water surface temperature in the evaporation process by 16% during the 24 hours; This caused water to evaporate at a higher temperature. In addition, the mentioned surface increased the thermal efficiency up to 85% in the radiation flux of 0.6 kW / m2. Another advantage of the surface designed in this research is its economic efficiency; So that the final cost to build each square meter of this area was estimated at about 200 thousand tomans
  9. Keywords:
  10. Surface Evaporation ; Insulation ; Plants ; Expandable Polystyrene ; Economic Saving ; Evaporation Reduction

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