Refrigerated tank containers are currently the primary method of transporting cryogenic liquids. The air outlet of the refrigeration system is blocked by the liquid tank

resulting in low energy efficiency of the refrigeration system. This study aims to improve the energy efficiency of the refrigeration system for a tank container with a limited installation space. The resistance loss of the air duct is reduced and the air volume of the condenser is increased by optimizing the condenser air duct structure and pipeline arrangement

thereby improving energy efficiency. By optimizing the structure of the air outlet

sufficient air volumetric flow rate can be achieved under blocked conditions. By optimizing the pipeline arrangement

the resistance loss of the condenser is reduced

and the air volumetric flow rate is increased. The test results of the above system show that air duct structure optimization and condenser flow path optimization can improve the energy efficiency of the refrigeration system by 25.0%

indicating that the proposed optimization scheme can effectively improve the energy efficiency of the refrigeration system for tank containers.