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On the experimental investigation of novel low-momentum ventilation concepts for cooling operation in a train compartment

Schmeling, Daniel and Volkmann, André (2020) On the experimental investigation of novel low-momentum ventilation concepts for cooling operation in a train compartment. Building and Environment, 182, pp. 1-12. Elsevier. doi: 10.1016/j.buildenv.2020.107116. ISBN 0360-1323. ISSN 0360-1323.

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0360132320304881

Abstract

We report on an experimental investigation of novel, low-momentum ventilation concepts for a train compartment. The concepts were analyzed with regard to thermal comfort, spatial homogeneity, heat removal efficiency and their capability of integration. The studies were conducted using thermal manikins in a generic train cabin, that is, the lower level of a double-deck high-speed train ”DLR’s Next Generation Train - NGT”. Various ventilation concepts comprising state of the art micro-jet ventilation (MJV) as well as novel low-momentum ventilation concepts were investigated. The novel concepts are floor-based cabin displacement ventilation (CDV), low-momentum ceiling-based ventilation (LMCV), a hybrid (HV) combination of CDV and LMCV as well as hatrack-integrated low-momentum ventilation (HLMV). The results proved that all investigated concepts have advantages and disadvantages. The recorded mean air velocities of all concepts are well below the limiting values defined in the standard for long-distance rolling stock. However, the analysis of the instantaneous velocities revealed that classical mixing ventilation exceeded the thresholds from time to time. Regarding the capability of integration, the floor-based CDV and the hatrack-integrated concept turned out to be advantageous since no space in the aisle zone is required. For the HLMV concept, which is fully integrated in the hatracks, stronger horizontal temperature fluctuations were recorded highlighting the need to optimize the HLMV air outlets. In the current stage, LMCV and the hybrid approach were found to be the best concepts. They were not rated as critical in any of the considered categories.

Item URL in elib:https://elib.dlr.de/134574/
Document Type:Article
Title:On the experimental investigation of novel low-momentum ventilation concepts for cooling operation in a train compartment
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schmeling, DanielDaniel.Schmeling (at) dlr.dehttps://orcid.org/0000-0003-2712-9974
Volkmann, AndréAndre.Volkmann (at) dlr.deUNSPECIFIED
Date:25 July 2020
Journal or Publication Title:Building and Environment
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:182
DOI :10.1016/j.buildenv.2020.107116
Page Range:pp. 1-12
Editors:
EditorsEmailEditor's ORCID iD
UNSPECIFIEDElsevierUNSPECIFIED
Publisher:Elsevier
ISSN:0360-1323
ISBN:0360-1323
Status:Published
Keywords:train compartment, HVAC, ventilation concepts, thermal comfort, heat removal efficiency
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Rail Transport
DLR - Research area:Transport
DLR - Program:V SC Schienenverkehr
DLR - Research theme (Project):V - NGT BIT
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Schmeling, Dr Daniel
Deposited On:20 Aug 2020 15:29
Last Modified:20 Aug 2020 15:29

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