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Evaluation of novel ventilation concepts for train compartments using thermal manikins and subject trials

Schmeling, Daniel and Hörmann, Hans-Jürgen (2018) Evaluation of novel ventilation concepts for train compartments using thermal manikins and subject trials. In: Fourth International Conference on Railway Technology: Research, Development and Maintenance. Fourth International Conference on Railway Technology: Research, Development and Maintenance, 03.-07. Sep. 2018, Sitges, Spanien.

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Official URL: http://www.railwaysconference.com/

Abstract

In the framework of the Next Generation Train (NGT) project of the German Aerospace Center (DLR), different aspects of future high-speed trains and the intermodal passenger and freight transport are addressed. Among many others, the thermal passenger comfort and the energy efficiency of the ventilation system are tackled. Aim of the present study is to identify novel ventilation concepts, which yield a higher comfort level, less energy demand and help to avoid the spreading of infectious diseases. Therefore, studies using thermal manikins and subject trails were performed in a generic train compartment representing the lower level of the NGT high speed train. Besides classical “micro-jet” ventilation, three novel ventilation concepts, comprising cabin displacement ventilation, ceiling based low momentum ventilation as well as hat-rack integrated low momentum ventilation, are investigated. First results covering mean flow velocities and temperatures in the seating zone as well as the heat removal efficiency are presented. These reveal, that displacement ventilation promises high potential for energy saving in combination with very low flow velocities, however, the temperature gradient between head and ankle is increased by a factor of four as compared to the other concepts. Furthermore, subject trails and objective measurements reveal, that hat-rack integrated low momentum ventilation, which is highly capable of being integrated in the structure, performs comparable or better compared to classical micro-jet ventilation. At the conference, we will present a detailed analysis of main flow features and other comfort relevant quantities for all different ventilation concepts. Furthermore, a comparison of the different ventilation concepts revealing the specific advantages and potential disadvantages in detail will be given. It comprises results of subject trails performed at different temperatures of the inflowing air as well as thermal manikin studies.

Item URL in elib:https://elib.dlr.de/119071/
Document Type:Conference or Workshop Item (Speech)
Additional Information:http://www.railwaysconference.com/conference-programme.asp; (Donnerstag 06.09.2018, Session B12, Paper B12.01)
Title:Evaluation of novel ventilation concepts for train compartments using thermal manikins and subject trials
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmeling, DanielDaniel.Schmeling (at) dlr.dehttps://orcid.org/0000-0003-2712-9974
Hörmann, Hans-JürgenHans.Hoermann (at) dlr.dehttps://orcid.org/0000-0002-6358-7027
Date:2018
Journal or Publication Title:Fourth International Conference on Railway Technology: Research, Development and Maintenance
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:train compartment, ventilation concepts, thermal comfort, energy efficiency, thermal manikins, subject trails
Event Title:Fourth International Conference on Railway Technology: Research, Development and Maintenance
Event Location:Sitges, Spanien
Event Type:international Conference
Event Dates:03.-07. Sep. 2018
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 > Fluid Systems, GO
Deposited By: Bachmann, Barbara
Deposited On:11 Sep 2018 14:11
Last Modified:11 Sep 2018 14:11

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