In order to design an environment-conscious house, it is desirable for summer indoor environment, to re-examine thermal conditions warmer than thermal comfort. The role of air movement is important, as it reduces the magnitude of discomfort. This paper discusses the comfort produced by air movement considering two main sensations; coolness and strength of movement, based on results obtained by a series of experiments carried out with five male and five female subjects.
Mechanical ventilation of workrooms was formerly based mainly on the dilution principle. In recent years, however, 50% of new investments in industrial ventilation in Scandinavia have been spent on displacement ventilation. Very little data exist from industrial settings on the relative performance of displacement ventilation versus dilution ventilation as regards air quality and thermal comfort. The present study collected data on the indoor climate in a sewing plant before and after the ventilation was changed from dilution to displacement.
This paper critically examines the underlying premises of indoor climate control technologies and the HV AC industry (heating, ventilating, air-conditioning). It questions whether 'total environmental control' is possible, effective and desirable. The paper also reviews the methods and terminology of thermal comfort science focusing on the question of predictability of people's environmental preferences.
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