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Title: HEAT TRANSFER FROM VEHICULAR CATALYST TO PAVEMENT
Accession Number: 00667671
Record Type: Component
Availability: Find a library where document is available Abstract: A study was undertaken to assess the effect of vehicle heat on bituminous pavement by comparing it with the effect of solar radiation. The catalytic converter (or catalyst) was chosen to represent a vehicle exhaust system. Catalysts transfer heat to pavements primarily by radiation, which can be calculated on the basis of existing theories. Two methods were used to calculate radiation from catalyst to pavement: view factor and solid angle. A simplified experiment showed that view factor calculation was closer to measured heat transfer. Data from catalysts of three vehicles were taken. Solar radiation absorbed by the pavement can be estimated from existing models and meteorological data. Results indicate that for one vehicle, pavement directly under the catalyst with an area the same as or smaller than the catalyst absorbed more radiation from it than from the sun. Size and temperature of the catalyst, distance between catalyst and pavement, and oxidation level of the catalyst material were all important factors. Because of the very small sample of vehicles studied, no general conclusions were drawn about whether vehicles on highways increase pavement surface temperature and cause rutting damage.
Supplemental Notes: This paper appears in Transportation Research Record No. 1435, Pavement and Traffic Monitoring and Evaluation. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Monograph Accession #: 01401245
Language: English
Authors: Findley, Kent SChen, Hong-JerPagination: p. 107-114
Publication Date: 1994-9
Serial: ISBN: 0309055121
Features: Figures
(6)
; References
(4)
; Tables
(5)
TRT Terms: Subject Areas: Highways; Pavements; I23: Properties of Road Surfaces
Files: TRIS, TRB
Created Date: Oct 13 1994 12:00AM
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