Performance evaluation of an energy-efficient oscillating air-conditioning dehumidification system through experimental testing and numerical modelling

This study examines the performance of a new oscillating air-conditioning dehumidification system, designed to overcome the limitations of traditional methods, such as energy-intensive defrost cycles and inconsistent dehumidification in high-humidity conditions. Experimental tests demonstrate that the system achieves a dew point as low as −9.38°C with specific humidity reaching to 1.67 g/kg and coefficient of performance (COP) ranging from 3.3 to 4.7. Apart from testing, numerical modelling of the system has been built in TRNSYS and validated using experimental data. A validated TRNSYS model was used to extend the analysis across various climate zones, revealing that the system performs optimally in high-humidity regions like Hong Kong and Chongqing, with an annual average COP of 3.89 in Hong Kong. In contrast, colder and drier regions like Urumqi maintained lower but stable energy efficiency, with an annual average COP of 2.30. These findings suggest that the oscillating air-conditioning dehumidification system offers versatile, climate-adaptable operation with potential applications in diverse building types. Practical Application This study’s findings offer built environment professionals an air-conditioning dehumidification solution suited to diverse climate conditions. The oscillating air-conditioning system, with its continuous dehumidification capability and optimised energy efficiency with COP of 3.89 in high-humidity regions, provides an approach for deep dehumidification in demanding environments. By reducing reliance on energy-intensive defrost cycles, this system is ideal for applications in commercial and industrial settings, such as healthcare facilities and battery manufacturing centres, where precise humidity control is critical.