Effect of row-crossing header configuration on refrigerant distribution in a two row/four pass parallel flow minichannel heat exchanger

An Investigation of the Pass Number on Heat Transfer and Pressure drop of the Minichannel Heat Exchangers

“…Figure 5 is a photo of test loop. Accuracies and ranges of testing apparatuses as well as equipments used for the experiments were the same in [8,9]. Experiment data obtained from the heat exchangers are under the constant room temperature condition of 30 C.…”

“…Regarding to effect of pass number to heat transfer of the minichannel heat exchanger, Byun and Kim [9] studied for a parallel flow minichannel heat exchanger having two row/four pass configuration by experimental method. In this study, the results showed that the optimum insert hole diameter was 4.0 mm.…”

“…In this study, when the pass number increased from three to five, the heat transfer rate of the heat exchanger increased. However, the results in [9][10][11] did not investigated optimum for the pass number as well as pressure drop in these heat exchangers.…”