Phase Separation in Microscale Convective Boiling Public Deposited

http://ir.library.oregonstate.edu/concern/undergraduate_thesis_or_projects/v405sc533

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  • It is hypothesized that extracting the vapor from two-phase flow in a microchannel will result in a lowered pressure drop required to drive the flow. The goal of this thesis is to construct an experimental device that will test this hypothesis by comparing a number of phase separating test conditions to respective control conditions that do not allow for any phase separation. It was discovered that using a transparent, thin-film heater to boil flow in a microchannel required too much power; the heater designed and built for this purpose was burnt out during testing. Possible reasons for the burnout are discussed. The original test plan was modified to boil the flow prior to the microchannel. The trends found from the new test plan supported the hypothesis. Vapor extraction was related to decreases in the pressure drops; however, vapor extraction rates were measured well below their predicted values. Reasons for the discrepancies are discussed. In conclusion, it was found that vapor extraction does decrease microchannel pressure drops due to decreases in two-phase flow effects.
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  • description.provenance : Made available in DSpace on 2009-07-24T20:54:34Z (GMT). No. of bitstreams: 1 [Current] ThesisLewis PDF.pdf: 2076541 bytes, checksum: 3accb7f232ebccdecdccd8a7780e6cf3 (MD5)
  • description.provenance : Submitted by Heather Boren (heather.boren@oregonstate.edu) on 2009-07-24T18:09:11Z No. of bitstreams: 1 [Current] ThesisLewis PDF.pdf: 2076541 bytes, checksum: 3accb7f232ebccdecdccd8a7780e6cf3 (MD5)

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