Modelling of the airflow in the passenger coach

• Autorzy: Sarna Izabela , Palmowska Agnieszka

Identyfikatory

DOI

10.21307/ACEE-2019-058

• Języki publikacji: EN

Abstrakty

EN

In this paper currents requirements of HVAC designing (Heating, Ventilation and Air Conditioning) in railway vehicles have been presented. The data were based on railway standards [1, 2]. The aim of this study was to carry out the numerical calculation of airflow combined with heat exchange in a passenger coach. ANSYS CFX 12.1 software was used to carry out the simulation. Two cases of boundary conditions were considered, the first obtained from design calculations common for ordinary buildings and information included in standards and the second only based on the information included in standards. After analysing of the results, it was found that the distribution of air velocity in a coach was similar in both cases, average air velocity was 0.79 m/s. However, the distribution of air temperature was different. For case 1 the average indoor air temperature was 25.07°C and for case 2 was 23.53°C. The method of determining the heat solar gains had a great impact on the results. A further possibility of a model improvement was indicated for example human models will be introduced in coaches, in order to verify the conditions of their thermal comfort, and air recirculation.

Słowa kluczowe

EN

airflow; coach; CFD; heat exchange; ventilation

PL

przepływ powietrza; wagon; CFD; przepływ ciepła; wentylacja

• Wydawca: Silesian University of Technology
• Czasopismo: Architecture Civil Engineering Environment
• Rocznik: 2019
• Tom: Vol. 12, no. 4
• Strony: 125--133
• Opis fizyczny: Bibliogr. 14 poz.

Twórcy

autor

Sarna Izabela

• MSc Eng.; Faculty of Energy and Environmental Engineering, The Silesian University of Technology, Konarskiego 18a, 44-100 Gliwice, Poland

autor

Palmowska Agnieszka

• PhD; Faculty of Energy and Environmental Engineering, The Silesian University of Technology, Konarskiego 18a, 44-100 Gliwice, Poland

Bibliografia

• [1] EN 13129:2016: Railway applications - Air conditioning for main line rolling stock - Comfort parameters and type tests.
• [2] UIC leaflet 553 Heating, ventilation and air-conditioning in coaches - Standard tests.
• [3] Haller G.(2006). Thermal Comfort in Rail Vehicles. RTA Rail Tec Arsenal Fahrzeugversuchsanlage GmbH, Vienna.
• [4] International Union of Railways, Railway Statistics 2017, Retrieved February 2 2019 from https://uic.org/IMG/pdf/uic-statistics-synopsis-2017.pdf
• [5] Zhang Y., Li J., Sun H., Liu J., Chen Q. (2015). Evaluation of different air distribution systems for sleeping spaces in transport vehicles. Building and Environment, 94, 665-675.
• [6] Aliahmadipour M., Abdolzadeh M., Lari K. (2017). Air flow simulation of HVAC system in compartment of a passenger. Applied Thermal Engineering, 8, 973-990.
• [7] Konstantinov M., Wagner C. (2016). Flow and Thermal Comfort Simulations for Double Decker Train Cabins with Passengers. Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance.
• [8] Suárez C., Iranzo A., Salva J. A., Tapia E., Barea G., Guerra J. (2017). Parametric Investigation Using Computational Fluid Dynamics of the HVAC Air Distribution in a Railway Vehicle for Representative Weather and Operating Conditions. Energies, 10, 1074.
• [9] Bosbach J., Lange S., Dehne T., Lauenroth G.( 2013). Alternative ventilation concept for aircraft cabin. Springer.
• [10] Schmeling D, Bosbach J.(2017). On the influence of sensible heat release on displacement ventilation in a train compartment. Building and Enviroment, 125, 248-260.
• [11] You S.-J. Yuan F.-D.(2007). CFD simulation and optimization of the ventilation for subway side-platform. Tunnelling and Underground Space Technology, 22, 474-482.
• [12] Chen J, Yi L., (2013). Influence of Ventilation Status on Combustion Characteristics of Coach Fire, Elsevier. Procedia Engineering, 52, 42-47.
• [13] Technical catalogue of Rawag(n.d.). In Schaltbau Rawag information, Retrieved 4 April, 2018 from www.rawag.pl
• [14] PN-ISO 7726: Ergonomics of the thermal environment - Instruments for measuring physical quantities.

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).