Experimental Study on Vertical Temperature Profiles under Two Forms of Airflow Organization in Large Space during the Heating Season
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Stratified air-conditioning systems are widely used in large space. The vertical temperature gradient is an important index to evaluate characteristics of the indoor thermal environment, and reasonable airflow organization in a large space is closely related to heating efficiency. The researches of the cooling season behavior of the system are various, but few researches on airflow organization for heating season have been carried out. This paper takes a large space building as the experimental object in winter, comparing the indoor vertical air temperature distribution, the temperature distribution of the working area, and the temperature distribution of the non-air-conditioned area of the two forms of airflow under different outdoor air temperatures and different air supply volumes. Furthermore, the heating load and heating efficiency are also compared based on experimental data. It is concluded that the vertical temperature gradient of the nozzle supply is slightly smaller than that of the columnar supply, and the indoor temperature of the nozzle is higher. In general, the heating effect of the nozzle supply is better than the columnar supply.
KeywordsLarge space Airflow organization Vertical temperature profiles Heating efficiency
This work was supported by the Natural Science Foundation of Shanghai (Grant No. 16ZR1423200).
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