A numerical investigation of the refrigerant maldistribution from a header towards parallel channels in an evaporator of automotive air conditioning system

Performance Improvement of an Air-Conditioning System During Refrigerant Evaporation

“…(3) Space with a font size 10 =h 2b -h 3 (4) Then the heat transfer of the air across the condenser can be calculated according to the difference bulb temperature between the air inlet and air outlet temperatures as given in the following equation [8].…”

“…While the surface temperature ( ) is constant across the condenser, then the heat balance can be expressed by [8].…”

“…If the number of rows less than 10, so the following equation can be calculates the Nusselt number [8]:…”

“…Stevanovic et al [8] numerical experiments are performed with design hanges of the evaporator header and the effectiveness of applied measures is demonstrated to eliminate the air exit temperature. They investigated by numerical simulations and analyses with the Computational Multi-Fluid Dynamic code.…”

Refrigerant maldistribution in brazed plate heat exchanger evaporators. Part B: Analysis of the influence of maldistribution on the evaporator performance

“…Most of the studies in the Literature about the problem of the maldistribution of the refrigerant mass flowrate among the different refrigerant channels have been carried out in micro channel evaporators (Brix et al, 2010(Brix et al, , 2009Gong et al, 2008;Kaern et al, 2011;Stevanovic et al, 2012), or in fin and tube evaporators (Bach et al, 2013;Choi et al, 2003;Mader et al, 2015) showing that the maldistribution in the air side has even a higher impact on the system performance than the maldistribution in the refrigerant side and reporting estimations of the COP degradation ranging from 5% to 40% depending on the evaporator and conditions analyzed.…”