Numerical Prediction Of Irregular Cyclic
Variation Of Temperature In An Underground
Metro System
Author(s)
H. Barrow & C.W. Pope
Abstract
Numerical prediction of irregular cyclic
variation of temperature in an underground
metro system
H. Barrow* & C.W. Pope&
"University of Liverpool, P.O. Box 147, Liverpool
^Crossrail Project Office, Telstar House
Eastbourne Terrace, London W2 6LW, UK
ABSTRACT
In this paper, a first Law of Thermodynamics analysis is made to predict the
daily variation of the average temperature in a subterranean railway tunnel
system operating under irregular cyclic conditions. The results of the finite
difference method used to determine the temperature history indicate that
the conjugate heat transfer to and from the tunnel wall attenuates the
temperature amplitude and causes a lag in the oscillations.
INTRODUCTION
In general, unsteady periodic heat transfer takes place with the temperature
varying either harmonically or irregularly. Examples in these two
categories are, respectively, an air conditioning plant with cosinusoidally
varying ambient conditions and trains in transit th
Keywords
Related Book
Other papers in this volume
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