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Impact of Local Comfort Zones in Long-Distance Rolling Stock on Objective and Subjective Thermal Comfort Rating

Schmeling, Daniel and Hörmann, Hans-Jürgen and Volkmann, André and Goerke, Panja (2019) Impact of Local Comfort Zones in Long-Distance Rolling Stock on Objective and Subjective Thermal Comfort Rating. In: 12th World Congress on Railway Research. 12th World Congress on Railway Research 2019, 28. Okt. - 01. Nov. 2019, Tokyo, Japan.

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Official URL: https://wcrr2019.org/

Abstract

We present first results of a study addressing the impact of local thermal comfort zones on the objective and subjective thermal comfort rating. The study is conducted in a realistic train geometry representing the lower deck of the DLR’s next generation train. Subject questionnaires and calibrated thermal manikins are used to capture comfort-relevant quantities. Cabin displacement ventilation with rather low supply air temperatures is employed as baseline ventilation and up to six individually con-trollable infrared (IR) heating panels enable the creation of local comfort zones. The three main findings are: a) the IR heating panels can compensate the cold-feet effect of low-temperature cabin displacement ventilation. This positive effect is also measurable for reduced IR panel configurations, which have a reasonable energy demand. As a result, a combination of highly effective displacement ventilation with a reduced IR panel configuration provides the potential for reducing the energy demand of the HVAC system. b) Activation of the IR panels strongly decreases the amount of dissatisfied passengers compared to the reference case. Further, giving the control of the IR panels to the individual passengers almost doubles the amount of satisfied passengers. c) The tem-perature evaluation of e.g. warm temperatures in the leg room differs significantly between male and female passengers. Solely the latter finding highlights the importance of local, individual comfort zones.

Item URL in elib:https://elib.dlr.de/120928/
Document Type:Conference or Workshop Item (Speech)
Title:Impact of Local Comfort Zones in Long-Distance Rolling Stock on Objective and Subjective Thermal Comfort Rating
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
Volkmann, Andréandre.volkmann (at) dlr.deUNSPECIFIED
Goerke, Panjapanja.goerke (at) dlr.deUNSPECIFIED
Date:29 October 2019
Journal or Publication Title:12th World Congress on Railway Research
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Next Generation Train, Local Comfort Zones, Rolling Stock, thermal comfort, subject trails, thermal manikins, IR panels
Event Title:12th World Congress on Railway Research 2019
Event Location:Tokyo, Japan
Event Type:international Conference
Event Dates:28. Okt. - 01. Nov. 2019
Organizer:Railway Technical Research Institute (RTRI, Japan)
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 , Hamburg
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Institute of Aerospace Medicine > Aviation and Space Psychology
Deposited By: Schmeling, Dr Daniel
Deposited On:06 Nov 2019 16:59
Last Modified:06 Nov 2019 16:59

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