Loading...

Visualization and Investigation of The Influence of the Connecting Channels on Flat-Plate Pulsating Heat-Pipes’ Heat-Transfer

Ebrahimi Dehshali, Massoud | 2015

692 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47163 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Shafii, Mohammad Behshad
  7. Abstract:
  8. A desired circulatory flow in flat-plate pulsating heat-pipes may improve electronic thermal management. This desired flow can be achieved by fabricating connecting channels (CCs) to increase flow resistance in one direction. In addition, connecting channels may increase the freedom degree of fluid. In order to investigate the effect of CC, two aluminum flat plate thermal spreaders with overall size 320mm×220mm×5mm - one with CC (CC-FPHP) and one without it- were fabricated. Both of the speaders have square channels with crosssection 2mm×2.8mm. The FPHPs were charged with ethanol as working fluid with filling ratios of 35%, 50%, 65%, and 80% by volume. Performance of connecting-channels in different orientations has been explored, and the operation of both FPHPs compared with respect to the gravity. The results demonstrate the better operation of CCs in comparison with heat-pipes with no connecting channel in all orientation angles. It has been observed that the most efficient application of CC-FPHP occurred at the filling ratio of 65%. The connecting channels may affect the flow regime, and to this end a high speed camera has been employed to visualize the flow pattern. It is observed that the performance of these added channels depend on the liquid fraction of FPHP
  9. Keywords:
  10. Observation ; Flat-Plate Pulsating Heat Pipe ; Heat Resistance ; Heat Transfer Enhancement ; Filling Ratio ; Input Power ; Interconnecting Channels ; Circulatory

 Digital Object List

 Bookmark

No TOC