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Thermal comfort of novel low-momentum ventilation concepts for passengers in long-distance trains

Maier, Julia and Hoermann, Hans-Juergen and Goerke, Panja and Zierke, Oliver (2023) Thermal comfort of novel low-momentum ventilation concepts for passengers in long-distance trains. Indoor and Built Environment, Online ahead of print. SAGE Publications. doi: 10.1177/1420326X231160038. ISSN 1420-326X.

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Official URL: https://dx.doi.org/10.1177/1420326X231160038


Thermal comfort is essential to increase the modal share of rail transport by attracting more passengers. In this study, three novel low-momentum ventilation concepts were analyzed regarding the thermal comfort of railway passengers and compared to a conventional ventilation setting. Using an experimental approach, objective measurements of climate parameters and subjective assessments from 146 test subjects in a generic train compartment were analyzed. Results revealed significant differences in perceived thermal comfort among the four ventilation settings. Subjects reported comparatively higher thermal comfort in hatrack integrated low-momentum ventilation and hybrid ventilation (HV) than in cabin displacement ventilation (CDV) and microjet ventilation (MJV). Vertical temperature stratification was strongest in CDV, leading to losses in the comfort of the lower body parts. In MJV, some temporary and local exceedances of air velocities were observed, which contributed to lower comfort evaluations at heads and shoulders. For all ventilation settings, warmer air temperatures were preferred. Our findings demonstrated that subjective comfort assessments reasonably complement earlier results derived from thermal manikin studies. Therefore, low-momentum ventilation, especially in terms of HV, has the significant potential to improve thermal conditions for long-distance journeys in passenger rail cars.

Item URL in elib:https://elib.dlr.de/194253/
Document Type:Article
Title:Thermal comfort of novel low-momentum ventilation concepts for passengers in long-distance trains
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Maier, JuliaUNSPECIFIEDhttps://orcid.org/0000-0003-1387-7939135570852
Hoermann, Hans-JuergenUNSPECIFIEDhttps://orcid.org/0000-0002-6358-7027UNSPECIFIED
Goerke, PanjaUNSPECIFIEDhttps://orcid.org/0000-0002-0340-388XUNSPECIFIED
Zierke, OliverUNSPECIFIEDhttps://orcid.org/0000-0003-0763-3372UNSPECIFIED
Date:March 2023
Journal or Publication Title:Indoor and Built Environment
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:Online ahead of print
Publisher:SAGE Publications
Keywords:Thermal comfort, human subject test, displacement ventilation, passenger rail car, long-distance journeys
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 - RoSto - Rolling Stock, V - NGT BIT (old)
Location: Hamburg
Institutes and Institutions:Institute of Aerospace Medicine > Aviation and Space Psychology
Deposited By: Maier, Dr. Julia
Deposited On:20 Mar 2023 08:51
Last Modified:23 May 2023 13:24

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