Thesis
Characterization of micro-capillary wicking evaporators
Master of Science (MS), Washington State University
2006
Handle:
https://hdl.handle.net/2376/575
Abstract
Micro-capillary channels can be used as an effective heat dissipation method. In this work, concentric resistance temperature detectors (RTDs) are used in conjunction with cooling channels to measure steady state evaporative efficiencies. The geometry and dimensions of the channels are varied to determine how these factors affect the evaporation capacity of the channels. Engine assembly tests are performed to determine how channel dimensions affect the dynamic operation of evaporator membranes with cooling channels. The channels are fabricated from SU8 at heights of 10, 40, and 70 [mu]m. The SU8 walls have widths of 5 and 10 [mu]m. Channel widths range from 10-90 [mu]m. In general, the 40 [mu]m high SU8 channels outperform the 10 and 70 [mu]m heights in both evaporative and dynamic efficiencies. The 5x40 [mu]m SU8 features with 70 [mu]m channels is found to have the highest overall performance. These dimensions yield a mass evaporation rate of 8.3 mg/min and dynamic efficiency up to 0.132% at a frequency of 40 Hz and input energy of 14.4 mJ. For 70 [mu]m high SU8 structures, the 90 [mu]m channels show the highest performance. These dimensions yield maximum mass evaporation rate of 7.2 mg/min and a dynamic efficiency up to 0.011% at a frequency of 40 Hz and input energy of 11.8 mJ. For 10 [mu]m high SU8 structures, the 35 [mu]m channels show the highest performance. These dimensions yield a mass evaporation rate of 9.2 mg/min with dynamic efficiency up to 0.021% at a frequency of 40 Hz and input energy of 10.7 mJ.
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Details
- Title
- Characterization of micro-capillary wicking evaporators
- Creators
- Tiffany Anne Quy
- Contributors
- Robert Foster Richards (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Identifiers
- 99900525385101842
- Language
- English
- Resource Type
- Thesis