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태상진(Sang-Jin Tae),조금남(Keumnam Cho) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
The present study experimentally investigated two-phase flow distribution of reftigerant through T -type branch with horizontal and vertical inlet tube. The experimental parameters were the orientation of inlet and branch tubes(horizontal and vertical), diameter ratios between inlet and branch tubes(0.61 and 1), and mass flux(200-500 kg/㎡) and quality(0.1-0.4) at the inlet tube. The mass flow split ratio into the branch tube always increased as the mass flux at the inlet tube decreased. As the inlet quality increased, the flow split ratio increased for horizontal inlet tube, whereas decreased for vertical inlet tube due to the gravity effect. As the orientation of branch tube was varied from horizontal to vertical upward for horizontal inlet tube, the quality at the branch tube increased by average 184%, and as the orientation of inlet tube changed from horizontal to vertical upward for horizontal branch tube, the quality at the branch tube decreased by 28-92% due to the gravity.
이수영(Soo young Lee),Hisashi Takeichi,태상진(Sang Jin Tae),윤백(Baek Yoon) 대한설비공학회 2010 설비공학 논문집 Vol.22 No.1
This paper is suggesting a new technology for refrigerant amount detection of a system air-conditioner installed under various installation conditions. System air-conditioner was introduced to domestic market first in 2000. It consists of one or a series of outdoor units and a number of indoor units connected with single pipe line to the outdoor unit. The system can vary the capacity from 2.0 kW to 186 kW. For the system Installed under long and high-elevated condition, about 100 kg of refrigerant is charged in the whole system. In this paper, the new technology RAD (Refrigerant Amount Detection) with edge technology of refrigerant cycle control and measurement of a system air conditioner was developed and investigated for its application for the various installation conditions.