20.500.12556/RUL-154505 Highly efficient desiccant-coated heat exchanger-based heat pump to decarbonize rail transportation In the rail sector, air conditioning accounts for 30% of the total operational energy consumption, thus, it is crucial to enhance the efficiency of air conditioning units (ACUs) to reduce overall energy consumption. Traditional ACUs for train vehicles usually have a low coefficient of performance (COP), often less than 2, because of condensation-based dehumidification and a consequent reheating process and also the restricted spaces to install ACUs on the rooftop of the cabinet. Herein, we present a novel ACU with an integrated structural design that uses desiccant-coated heat exchangers (DCHEs) coupled with heat pumps, providing comfortable air conditioning on the metro or high-speed trains. This approach provides a direct method for reducing the air temperature and humidity simultaneously, thus realizing the decoupling of temperature and humidity treatments on a single heat exchanger. Using this design, experimental results show that the proposed system can improve the COP by ∼40% under standard conditions compared with existing ACUs (2.5 vs. 1.8). In addition, the proposed system achieves the highest COP of 2.8 under Shenzhen ground conditions (high humidity and temperature conditions) and exhibits high adaptability to various climate zones. The application of the DCHE-based system in the rail sector can significantly contribute to the decarbonization of the sector and make rail transportation sustainable and ready for a green transformation. heat pumps sorption materials desiccant coated heat exchangers air-conditioning rail sector toplotne črpalke energetska učinkovitost sorpcijska sredstva desikativni prenosniki toplote železniški promet true false true Angleški jezik Slovenski jezik Članek v reviji 2024-02-19 10:37:49 2024-02-19 10:37:53 2024-02-20 03:41:44 0000-00-00 00:00:00 2023 0 0 11 str. Vol. 271, art.127014 May 2023 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2025-02-22 621.577 1873-6785 10.1016/j.energy.2023.127014 185939971 Shao...-Highly_efficient_desiccant-coated_heat_exchanger-based_heat_pump_to_decarbonize_rail_transportation.pdf Shao...-Highly_efficient_desiccant-coated_heat_exchanger-based_heat_pump_to_decarbonize_rail_transportation.pdf 1 0343676F308A55FBF70C327FD421642D 91bf7c2f14e0d9e081977275e2fc00054c54ac26b6ce16ea08df80a01cd26114 c18a958d-cf0a-11ee-9559-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=180971 https://www.sciencedirect.com/science/article/pii/S0360544223004085 1 8ed8d739-cf0a-11ee-9559-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=180970 Fakulteta za strojništvo 0 0 0