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A Study on the Evaluation of Air Change Efficiency of Multi-Air-Conditioner with Ventilation System for Heating Season  

Kwon Yong-Il (Department of Building Mechanical Engineering, Shinheung College)
Han Hwataik (School of Mechanical& Automotive Engineering, Kookunin University)
Kim Kyung-Hwan (LG Digital Appliance Research Laboratory)
Chung Baik-Young (LG Digital Appliance Research Laboratory)
Lee Gam-Gue (LG Digital Appliance Research Laboratory)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.17, no.1, 2005 , pp. 56-61 More about this Journal
Abstract
Indoor air quality becomes of a concern recently in view of human health. This study investigates the air diffusion performance and the air change efficiency of a classroom, when outdoor air is introduced in addition to the heating/cooling operation of a ceiling-mounted heat pump. A CFD analysis has been performed to investigate the effect of the discharge angle of the air jets from the heat pump for both parallel and series types of outdoor air system. It is observed that the series type creates more uniform indoor environment compared to the parallel type in general. It can be concluded the discharge angle should not be larger than 40o for the parallel type, in order not to generate thermal stratification in the room.
Keywords
Air change efficiency; Four-way-cassette heat pump; Air diffusion performance index;
Citations & Related Records
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  • Reference
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3 TITUS, 1996, Engineering Guidelines in Titus Catalog T96
4 Sandberg, M., 1981, What is Ventilation Efficiency, Building and Environmental, Vol. 16, No. 2, pp. 123-135   DOI   ScienceOn