Field tests for evaluating variable geometry microchannel heat exchanger (VG-MCHE) performance have been started this week. VG-MCHE design features variable fin types and dimensions, tube geometries, port shapes and the location of fins and tubes within the same heat exchanger core.
VG-MCHE design with altered fin geometry and density for different heat exchanger sections suggest reduced airflow mal-distribution effect, as well as lowered airside resistance.
To minimize the header-to-tube refrigerant flow maldistribution, cross-section areas of each tube are adjusted for a better balance of mass flux and pressure drop in tubes.
As a result of VG-MCHE research, the Lambda family of precision cooling units will be adopted to use variable geometry microchannel heat exchangers, thus increasing the overall energy efficiency and performance.
Read more about microchannel heat exchangers here.