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Field Study of Thermal Comfort with Radiant Walls

Susana Garcia-San Roman

Supervisor Dr. James A. LoveNovember 22, 2011

SAIT Tower Residence 24,000 m222 stories

445 suites for students715 residents.

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QUESTIONS BEFORE THE RESEARCH ...

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KEY POINTS- OUTLINE

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THERMAL COMFORT: PERSONAL PARAMETERS

QUESTIONNAIRE RESPONDENTS

RESULTS – WINTER SURVEY

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THERMAL COMFORT: ENVIRONMENTAL PARAMETERSDRY BULB TEMPERATURE (ºC)

COOLING DESIGN T (26.6ºC)

HEATING DESIGN T (25.7ºC)

19-29ºC

14-24ºC

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INDOOR CLIMATE (WINTER): AIR STRATIFICATION

THERMAL COMFORT: ENVIRONMENTAL PARAMETERS

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THERMAL COMFORT: ENVIRONMENTAL PARAMETERSINDOOR CLIMATE: RADIANT ASYMMETRY

SURFACE TEMPERATURES (WINTER)

SURFACE TEMPERATURES (SUMMER)

COLD FLOOR

19ºC

12ºC

15ºC 27ºC

44ºC25ºC

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OCCUPANT COMFORT ASSESSMENT

LOCAL THERMAL DISCOMFORT

•29% COLD FLOOR•16% HIGH VERT. AIR T DIFFERENCE•RADIANT ASYMMETRY•DRAFT

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Predicted percentage dissatisfied: PPD 10 % + 10 %Predicted mean vote: PMV - 0.5 to + 0.5

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PREDICTED COMFORT INDICESCALCULATION WITH CODE ASHRAE 55 TC STANDARD FROM 6 PARAMETERS

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OCCUPANT COMFORT ASSESSMENT (QUESTIONNAIRE RESPONSES)

THERMAL SENSATION

ACTUAL COMFORT INDICES

VOTES IN THE 3 CENTRAL CATEGORIES 74 % ACTUAL % DISSATISFIED 26 %

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COMPARISON INDOOR ENVIRONMENT PARAMETERS WITH COMFORT ZONE (WINTER)

1 CLO1-1.3 METVa 0.2 m/s

COMFORT ZONE (STANDARD 55 ASHRAE 2010)

SATISFIED

DISSATISFIED

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THERMAL RESPONSES IN A DYNAMIC ENVIRONMENT

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ADAPTIVE MODEL IN THERMAL COMFORT RESEARCH

TC ASSESSMENT, A DYNAMIC ACCUMULATIVE DECISION MAKING PROCESS

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ADAPTIVE MODEL IN THERMAL COMFORT RESEARCH

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... QUESTIONS AFTER THE RESEARCH

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Thank you!

Questions welcome