Limits on aspect ratio in two-fluid microscale heat exchangers
- Oregon State Univ., Corvallis, OR
This research investigates the theoretical limit on aspect ratio within two-fluid counter-flow microchannel heat exchangers. The counter-flow device is comprised of alternating layers of microchannels, which allow the two fluids to flow in opposite directions, separated by fins. A theoretical model for interpreting the span of the fin as a function of the fin thickness is established. The model is verified experimentally by fabricating two kinds of test specimens to simulate the counter-flow device. Results from metallography and leakage testing reveal that for a given set of bonding conditions, there exists a maximum permissible value of elastic fin deflection during bonding beyond which leakage is bound to occur. Furthermore, the results imply that higher aspect ratios can be achieved at smaller scales.
- Research Organization:
- Oregon State University, Corvallis, OR; Albany Research Center (ARC), Albany, OR
- Sponsoring Organization:
- Office of Naval Research
- OSTI ID:
- 923533
- Report Number(s):
- DOE/ARC-2001-131
- Country of Publication:
- United States
- Language:
- English
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