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Recently, the regulations about install standard of ventilation equipment has been newly established to secure Indoor Air Quality environment. And the application of heat recovery ventilation system has been increased during apartment houses. Therefore, there are a lot of ongoing studies about reducing height of ventilation unit to install in the limited duct space. A diamond shaped element core has advantages such as increasing heat exchange efficiency and easy installation of fan.
In this study, we will review heat exchange efficiency variation due to shape design of element core to build database of heat exchange efficiency and to seek the best suitable shape design of element core for heat exchange.
The result of this study was as follows ; (1) For temperature, humidity and enthalpy exchange efficiency, as the airflow increases in all cores, the overall heat exchange efficiency was contrary reduced. (2) As the angle was reduced to 75 and 60, the contact length was increased and therefore the heat exchange time was increased. (3) Thus, in shape design of element core, the increase of contact time and reducing airflow confirmed to be very effective factor for increase efficient.

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Abstract
1. 서론
2. 전열교환 환기유니트 엘리먼트 코어 개요
3. 실험개요
4. 실험결과 및 분석
5. 결론
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UCI(KEPA) : I410-ECN-0101-2009-546-018489269