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Influence of shape and heat release of thermal passenger manikins on the performance of displacement ventilation in a train compartment

Schmeling, Daniel and Bosbach, Johannes (2019) Influence of shape and heat release of thermal passenger manikins on the performance of displacement ventilation in a train compartment. Indoor and Built Environment. SAGE Publications. DOI: 10.1177/1420326X19856673 ISBN 1420-326X ISSN 1420-326X

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Official URL: https://journals.sagepub.com/doi/full/10.1177/1420326X19856673

Abstract

The influence of sensible heat release on the performance of displacement ventilation was studied in a generic laboratory representing the lower cabin of the German Aerospace Center (DLR)’s Next Generation Train. Tests at variable mean cabin temperatures were conducted with human subjects, thermal manikins and heating mats at different but constant heat release rates. Moreover, tests with thermal manikins and an adaptive heat release rate were performed. Flow fields, surface temperature distributions as well as local temperatures and velocities were evaluated. The study revealed that the shape of the heat sources is negligible if only global quantities, such as the global enthalpy flux or the heat removal efficiency, are evaluated. The latter was found to be independent of the amount of released heat. However, it strongly reacts to the choice of probe positions used for the mean cabin temperature. Regarding the comfort-relevant flow parameters, both the shape and the heat release rate are highly relevant to temperature stratifications and flow fields in the passenger zone. The manikins with adaptive heat release proved to be a major improvement in terms of realistic simulation of the human metabolism for investigations regarding the performance of ventilation systems. However, the determination of the mean cabin temperature receives increased relevance as it is prone to limit the closeness to reality.

Item URL in elib:https://elib.dlr.de/125182/
Document Type:Article
Additional Information:ISSN: 1420-326X, ESSN: 1423-0070
Title:Influence of shape and heat release of thermal passenger manikins on the performance of displacement ventilation in a train compartment
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmeling, DanielDaniel.Schmeling (at) dlr.dehttps://orcid.org/0000-0003-2712-9974
Bosbach, JohannesJohannes.Bosbach (at) dlr.dehttps://orcid.org/0000-0002-1531-127X
Date:18 June 2019
Journal or Publication Title:Indoor and Built Environment
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1177/1420326X19856673
Editors:
EditorsEmail
UNSPECIFIEDsage
Publisher:SAGE Publications
ISSN:1420-326X
ISBN:1420-326X
Status:Published
Keywords:sensible heat release; human subjects; thermal manikins; heating mats; EN13129:2016; displacement ventilation; train compartment
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Next Generation Train III (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Schmeling, Dr Daniel
Deposited On:09 Oct 2019 12:08
Last Modified:09 Oct 2019 12:08

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