Experimental investigation of Cu-based, double-layered, microchannel heat exchangers

Abstract

Cu-based, single- and double-layered, microchannel heat exchangers (MHEs) were fabricated and assembled. Comparative measurements on liquid flow characteristics and heat transfer performance were conducted on these devices. Results were compared at the individual microchannel level as well as at the device level. The present results demonstrate that double-layered MHEs exhibit similar heat transfer performance while suffering a much lower pressure drop penalty compared to single-layered MHEs. Another Cu-based, double-layered, liquid–liquid counter-flow MHE was fabricated, assembled and tested. Results show that a low-volume, multilayered, high-performance, liquid-to-liquid MHE is achievable following the manufacturing protocols of the present double-layered, liquid–liquid counter-flow MHE.

Optimization of thermal resistance and bottom wall temperature uniformity for double-layered microchannel heat sink

“…Vafai and Zhu [21] proposed a new design concept of double-layered microchannel heat sink (DL-MCHS), where two single-layered microchannel heat sinks (SL-MCHS) are staked one on top of the other. Following Vafai and Zhu's work, extensive studies focused on the DL-MCHS were conducted [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37], which further justified the results indicated by Vafai and Zhu [22][23][24], demonstrated that the channel number [25,26], aspect ratios of the top and bottom channels [25][26][27][28][29], channel-to-pitch width ratio [25], and inlet velocities of both layers [26,30] have important effects on the DL-MCHS, and obtained the optimal values of these parameters. In these studies [25][26][27][28][29][30], when the effect of a specific parameter on the DL-MCHS was examined, the other parameters remained unchanged.…”

Investigation of the Corrosion Behavior of Atomic Layer Deposited Al2O3/TiO2 Nanolaminate Thin Films on Copper in 0.1 M NaCl

“…Copper is ubiquitous in numerous industries due to its relatively low cost coupled with its malleability and high electrical and thermal conductivities. It has uses in everything from residential and commercial plumbing [ 1 , 2 , 3 , 4 ] and electrical wiring to industrial heat exchangers [ 5 , 6 , 7 ] and high-powered electronics [ 8 , 9 , 10 , 11 ]. Copper possesses adequate aqueous corrosion resistance due to the formation of a semi-protective native oxide film.…”

Corrosion Protection of Copper Using Al2O3, TiO2, ZnO, HfO2, and ZrO2 Atomic Layer Deposition

“…Copper is a common metal widely used in applications such as plumbing and heat exchangers. − While copper has a reasonable resistance to corrosion in liquid water, there is a finite corrosion rate, which decreases the life of the materials. The rate of copper corrosion is dependent on the water’s temperature, pH, and solutes. ,,− The application of barrier coatings on copper is one method to reduce corrosion.…”