Experimental evaluation of a transcritical CO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math> refrigeration facility working with an internal heat exchanger and a thermoelectric subcooler: Performance assessment and comparative

• Solutions to boost the COP of low-medium power transcritical CO2 refrigeration cycles Evaluation an internal heat exchanger (IHX) and a thermoelectric subcooler (TESC) Comparative cooling capacity between IHX TESC Greater improvements obtained in with Discussion strengths weaknesses both technologies for The use carbon dioxide state has become one most used solutions comply F-Gas directive reduce greenhouse gases emissions from systems at high ambient temperatures. For units, commonly improve efficiency such as ejector, multiple compressor arrangements, mechanical subcooler, etc., add complexity increase cost facility, which is not ideal small units. In this range, two stand out performance cycle: subcooler. This study brings complete research have been tested same experimental facility under working conditions. It focuses on real discusses using or results show that outperforms coefficient while also being more controllable flexible solution.