Earticle

Apartments that will build or already built recently must have ventilation facilities, and type 1 ventilation system is applied commonly. The space for ventilation ducts is needed in order to supply fresh air in the room. However, It's very difficult that the spaces ensured. This paper propose low static pressure ventilation duct system through Airflow Control Distributor Design and Flexible Air-hose Experiment by CFD simulation to develop ventilation duct system that is low static pressure and easily installed. The low static pressure ventilation duct system is expected wide application as ventilation duct system for apartment. Because The low static pressure ventilation duct system highly reduce pressure loss and can handily work when it is installed.

Recently, the instruction of house ventilation system was necessary because of the recent construction trend and the legal ventilation frequency 0.7 point inside the house of common. It is general in the ventilation system that air supply and return to each room. But that system is not efficient in the economic and construction circle. So we study the instruction of unify ventilation system. The purpose of system is to compare the original ventilation system and unify ventilation system. The results which it applies from actual apartment site are as following. In the wind-amount test, unify ventilation system shows more wind amount than the existing facilities. Pressure loss shows the opposite results. This displays a more efficient ventilation ability and there is also an application possibility. Finally, we finds unify ventilation system's a new possibility and we recognize that more detailed-tests are required to unify ventilation system's practical use.

In this paper, we designed simple serial distributer for multiport which is imposed the primitive ranking with a periodic time of received multipath data. The received data are transmitted from manifold multi-device system to decoder and on data in the multiplexer which is to transmit to PC is selected from binary counter.

본 논문은 수/배전반에 대한 오류 및 전기 화재를 일으키는 부분 방전을 측정하기 위한 두 가지 형태의 센서 모듈 설계하고 이들의 성능을 평가한다. 설계한 센서 모듈을 이용하여 상전류의 관계와 부분 방전 및 과열을 분석한다. 수/배전반의 고장이나 전기화재를 방지하기 위하여 정보를 분석 및 이용을 이용하여 안정성 지수를 활용하는 방법을 제안한다.

In this paper, we design two types of the sensor module to measure the partial discharge causing failures and electric fires for power incoming/distributer. And evaluate the performance thereof. Analyze the correlation of the phase current and the partial discharge and overheating. Proposes to apply the stability index by utilizing the analyzed information and use in order to prevent the failure or electrical fire of the power incoming/distributer.