| Title |
An Experimental Study on Flow Characteristics for Dual-Structured Orifice |
| Authors |
곽경민 ; 김하덕 ; 이중형 ; 배철호 ; 김종엽 |
| Keywords |
Dual-structured orifice ; 이중구조 오리피스 ; Variable capacity refrigeration ; 용량가변 냉동 |
| Abstract |
To investigate the characteristics of orifice as an expansion devices, the experimental apparatus was made and experiments are being performed using R22 and R290. The main idea of this control method of refrigerant flow rate with coupled orifices is to control the ON/OFF state of T and Ball type orifice corresponding to the subdivided region of thermal load. When system requires minimum thermal load, both T and Ball type orifices are closed, but refrigerant can flow through small hole of T type orifice. In regular thermal load, when ball type orifice is closed, T type orifice is opened and mass flow rate increase more than OFF state of T type orifice, due to large diameter. In maximum thermal load, both T and Ball type orifices are open and the much refrigerant can flow. The flow characteristics on T type orifice and parallel-combined orifice are obtained in the subdivided region of thermal load. |