Abstract
In this work, the climatic chamber CORE-CARE is presented. The laboratory was built at the Industrial Engineering Department of the University of Padova, in order to further investigate issues related to indoor environmental quality, the comfort perceived by people in confined spaces and thermal performance of radiant systems. CORE-CARE is equipped with radiant panels in each surface, which can be controlled separately. The room presents two real windows on the East side, equipped with shading systems. Furthermore, the mechanic controlled ventilation system installed in the room can act as integration of sensible or latent heat both in heating and in cooling conditions. The climatic chamber is provided with a data acquisition system, consisting of 38 sensors, that allow the evaluation of the surface temperatures in different positions, the air temperature at different heights, the mean radiant temperature, relative humidity and CO2 concentration. The CORE-CARE chamber is thermally characterized using a detailed model developed at the Industrial Engineering Department of the University of Padova and the simulations results are compared with test measurements. Moreover, the impact of radiant asymmetry is investigated.
Highlights
The objective of this work is to reach a knowledge of the dynamic behaviour of the room: in order to manage the boundary conditions for future tests, the characterization the of the test room is necessary to understand the correlation among different quantities; to reach this goal, the test room was modelled using the software DigiThon [11] and the obtained results were compared to measurements collected in the room
On the left graph of each figure the following results are shown: - The four different wall surface temperatures detected by the sensors; - The average surface temperature, calculated as arithmetic mean of the previous ones; - The average temperature obtained from the simulations; - The average air temperature, calculated as the arithmetic mean of the measured values at different heights in the centre of the room
A focus on the air temperature is reported to underline the stratification effect which can be noticed by observing the temperature profiles at different heights: the higher the sensor position, the higher the air temperature; besides, these profiles are compared with the air temperature obtained from simulations
Summary
The perceived comfort inside buildings is one of the most relevant issues investigated in the literature. Some tests carried out in a climatic chamber were used for the evaluation of the comfort limits due to the radiant asymmetry: by means of measurements and surveys of tested subjects, he set limits for acceptable comfort condition with regard to radiant asymmetry in case of warm ceiling [2], cool ceiling, warm wall and cool wall [3] This study was carried out with a similar methodology to the one proposed by Fanger, based on both measurements and survey
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