Sensitivity to temporal variations in thermal conditions.

نویسندگان

  • I D Griffiths
  • D A McIntyre
چکیده

This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae, and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand, or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material. This paper describes an experiment in which 16 people each experienced four levels of change in temperature and reported their sensations. Changes were of 0°, 3°, 6° and 9°0 and were symmetrical about "& centrepoint of 23°0 and linear over an exposure period of 6 hours. Changes occurred in both upward and downward directions. Subjects reported their warmth sensations at hourly intervals and gave a. summary eaeeesrnene on 11 semantic differential scales at the end of the period. of exposure. The smallest rate of change was reliably detected and changing environments were reported to be less pleasant and more uneven than the steady state. Degree of extraversion of the subjects and direction of changes in temperature were non-signifioent variables. A method of estimating the degree of dissatisfaction produced by temperature changes is briefly described. 1. Introduction In commercial buildings it is frequently the case that thermal conditions vary over time. Thus, offices may be heated by heat storage devices which provide high temperatures at the beginning of the working day and lower temperatures later on. Factories and other workplaces often rely on incidental heat gains from machinery, lighting and people to provide a large part of the heat requirement: in this case, conditions will be cool in the early part of the working day and warmer at the end. Research into the effects of thermal conditions on performance and comfort has shown a bias towards study of the effects of constant conditions. In a sense this is remarkable since, because of human adaptability, effects would more likely be seen under dynamic conditions. For convenience, it is possible to distinguish three sorts of temperature variation on which experimentation has taken place: step changes (Gagge et al. 1967); cyclic changes …

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عنوان ژورنال:
  • Ergonomics

دوره 17 4  شماره 

صفحات  -

تاریخ انتشار 1974