Discipline: Technology and Engineering
Subcategory: Civil/Mechanical/Manufacturing Engineering
Room: Virginia C
Jaime Rios - University of the District of Columbia
Co-Author(s): Dr. Jiajun Xu, P.E., University of the District of Columbia, DC
Effective system energy management and cooling is critical for a range of increasingly complex systems and missions. Various industries and agencies seek technologies and design techniques to cool ultra-high heat fluxes in various applications, and thereby increase system energy efficiencies in future advanced lasers, radars and power electronics. There has been an increasing interest in exploiting the use of additive manufacturing in developing nontraditional cooling schemes to be built directly into components. This study investigates the heat transfer and pressure loss performance of additively manufactured micro channels. A heat exchanger of 30 micro-sized channels were manufactured via Direct Metal Laser Sintering (DMLS) method and tested at a range of Reynolds numbers. Same test setup and configurations have been used to test the DMLS manufactured micro-channel heat exchanger, and the results are compared to the mini-channel heat exchanger of similar dimension but manufactured traditionally. The results have shown that although DMLS fabricated micro-channel heat exchanger yield a higher-pressure loss, but it has shown significantly improved convective heat transfer coefficient compared to a mini-channel heat exchanger of similar channel dimensions fabricated traditionally. It is likely that non-post processed surface of the micro-channels manufactured from DMLS process are the main contributor of this augmented heat transfer. Future research involves more data on the fully developed turbulent region and different heat inputs may help understand the convective heat transfer of nanoemulsion. References: Stimpson, C. K., Snyder, J. C., Thole, K. A., and Mongillo, D., 2016, “Roughness Effects on Flow and Heat Transfer for Additively Manufactured Channels,” Journal of Turbomachinery, 138(5), pp. 051008-051008-051010 Sadaghiani, A. K., Saadi, N. S., Parapari, S. S., Karabacak, T., Keskinoz, M., and Kosar, A., 2017, “Boiling heat transfer performance enhancement using micro and nano structured surfaces for high heat flux electronics cooling systems,” Applied Thermal Engineering, 127, pp. 484-498.
Funder Acknowledgement(s): Funding was provided by an NSF/HBCU-UP RIA grant to Dr. Jiajun Xu.
Faculty Advisor: Dr. Jiajun Xu, P.E., firstname.lastname@example.org
Role: I personally designed and built the flow loop used in the research, collected, aggregated and charted the data.