Non-uniform pressure drops and the uneven heat load can easily cause the mal-distribution of the working fluids in the parallel evaporator lines, which further leads to non-optimum thermal performance. The electrically driven flow based on the electrohydrodynamic (EHD) conduction pumping has potential to actively control the two-phase flow distribution among parallel evaporator lines. In this paper, an EHD conduction pump, designed for active flow control of the parallel evaporators, is experimentally investigated in a single-phase liquid refrigerant loop. specifically, the pressure head, the net flow velocity, and the power consumption at different applied potentials are presented. HCFC refrigerant R-123 is used as the working fluid. In the absence of a net flow, the EHD conduction pump with three electrode pairs generated 1270 Pa at 17 kV with HCFC refrigerant R-123 as the working fluid. In the presence of a net flow, the EHD conduction pump generated a pressure head of 425Pa and a velocity of 8.9cm/s at 15kV. The corresponding power consumption was below 1W. The generated pressure head and the corresponding liquid flow can effectively control the flow distribution among parallel evaporator lines.
EHD Conduction Pump Designed for Flow Control of Parallel Evaporators
Feng, Y, Seyed-Yagoobi, J, & Datta, S. "EHD Conduction Pump Designed for Flow Control of Parallel Evaporators." Proceedings of the ASME 2003 International Mechanical Engineering Congress and Exposition. Heat Transfer, Volume 4. Washington, DC, USA. November 15–21, 2003. pp. 15-19. ASME. https://doi.org/10.1115/IMECE2003-41149
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