ICEET '09 Proceedings of the 2009 International Conference on Energy and Environment Technology - Volume 01
Advanced Engineering Informatics
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The fine water mist is a type of sustainable and environment-friendly cooling technology. This paper concerns the use of water mist flow to improve the quality of urban environment in summer. According to the survey and analysis on the potential for saving energy consumption of household air condition, calculating the energy consumption and carbon reduction of spray cooling system, a theoretical basis for popularization of this technology for regulation in urban environment was provided. In order to character the cooling performance of water mist flow, the CFD simulation was conducted as a design tool to investigate the temperature and relative humidity distribution for different relative Reynolds and environmental conditions. The discrete phase model was used to simulate the performance of the water mist cooling process in terms of microclimate improvement. With the increased of relative Reynolds number, the extent of cooling area was expanded due to the increase of spray penetration length. The effect of relative humidity increasing was degraded by increasing the relative Reynolds number. The temperature distribution for the case of semi-outdoor environment indicates that the presence of roof and the height of roof fixed would influence the cooling effect. In case of ventilation for the cooling is well equipped, the change of environmental condition doesn't make effect on the relative humidity distribution evidently. The results obtained showed that numerical simulation could be used as a predictive manner to optimize the performance of spray cooling process in the outdoor environment.