Mass Flow Rate Distribution and Phase Separation of R-22 in Multi-Microchannel Tubes Under Adiabatic Condition

Two-phase flow distribution of air–water annular flow in a parallel flow heat exchanger

“…As the protrusion depth increased, more water flowed through the downstream part of the header. Cho et al (2003) investigated the effect of the header orientation (vertical and horizontal) and the refrigerant inlet pipe direction (inline, cross, parallel) for a round header -fifteen flat tube configuration using R-22. The mass flux was fixed at 60 kg/m 2 s, and the quality was varied up to 0.3.…”

Effects of fluid properties on two-phase flow and refrigerant distribution in the vertical header of a reversible microchannel heat exchanger – Comparing R245fa, R134a, R410A, and R32

“…Although airewater [5], R11 [8], R22 [9], R134a [6], R410A [7], and R744 [12], etc. were tested in the studies of refrigerant distribution in both horizontal and vertical headers, the comparison between different fluids in the same geometry was seldom studied.…”

Performance comparison of microchannel evaporators with refrigerant R-22

“…They reported that the tube intrusion depth had a great effect on the water flow distribution under downward flow configuration, while it did not alter the flow distribution under upward flow configuration. On the other hand, Cho and Cho [13] experimentally investigated flow maldistribution and phase separation characteristics in microchannel tubes using the refrigerant of R-22. Koyama et al [14] represented some experimental results for two-phase flow distribution in horizontal headers with downward 6 minichannel-branches using R-134a.…”