Povzetek
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.
Ključne besede
toplotne črpalke;energetska učinkovitost;sorpcijska sredstva;desikativni prenosniki toplote;železniški promet;heat pumps;sorption materials;desiccant coated heat exchangers;air-conditioning;rail sector;
Podatki
Jezik: |
Angleški jezik |
Leto izida: |
2023 |
Tipologija: |
1.01 - Izvirni znanstveni članek |
Organizacija: |
UL FS - Fakulteta za strojništvo |
UDK: |
621.577 |
COBISS: |
185939971
|
ISSN: |
1873-6785 |
Št. ogledov: |
13 |
Št. prenosov: |
1 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Slovenski jezik |
Sekundarne ključne besede: |
toplotne črpalke;energetska učinkovitost;sorpcijska sredstva;desikativni prenosniki toplote;železniški promet; |
Vrsta dela (COBISS): |
Članek v reviji |
Konec prepovedi (OpenAIRE): |
2025-02-22 |
Strani: |
str. 1-11 |
Zvezek: |
ǂVol. ǂ271, [article no.] 127014 |
Čas izdaje: |
May 2023 |
DOI: |
10.1016/j.energy.2023.127014 |
ID: |
22947220 |