TY - JOUR N2 - Work on increasing the efficiency of heat exchangers used in car air conditioning systems may lead to a partial change in the construction of refrigeration systems. One of such changes is the use of smaller gas coolers, which directly translates into a reduction in the production costs of the entire system. The article presents the use of computational fluid dynamics methods to simulate the impact of changing the shape of an internal heat exchanger on the cooling efficiency with R744 as the refrigerant. Internal heat exchangers with different geometry of the outer channels were subjected to numerical analysis. The obtained results of calculations show temperature changes in inner and outer channels on the length of the heat exchanger. L1 - http://journals.pan.pl/Content/111925/PDF/09_paper.pdf L2 - http://journals.pan.pl/Content/111925 PY - 2019 IS - No 1 EP - 160 DO - 10.24425/ather.2019.128295 KW - Heat exchangers KW - Internal heat exchanger KW - Cooling efficiency KW - Numerical fluidmechanics A1 - Janus, Jakub A1 - Skotniczy, Przemysław Jan A1 - Richert, Maria PB - The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences VL - vol. 40 DA - 2019.04.01 T1 - Modeling of the impact of construction solutions on operating parameters of the internal heat exchanger with refrigerant R744 SP - 145 UR - http://journals.pan.pl/dlibra/publication/edition/111925 T2 - Archives of Thermodynamics ER -