Air-conditioning with underfloor air supply: Comfort in non-uniform thermal environment

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Abstract
The effect of a non-uniform thermal environment on subjects is studied using an air-conditioned chamber with underfloor air supply and radiator panels. The mean equivalent temperature Teq around sitting subjects is intentionally varied, and boards placed at waist level allow various combinations of upper and lower Teq to be realised. Thermal sensation and comfort votes are analysed for the whole body, the upper body and the lower body. In winter, female subjects tolerated cold over the lower body. In summer, experiment, subjects generally felt comfortable over the whole body whenever the upper Teq was 26°C and the difference between upper and lower Teq was within 3°C.

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