In this paper, we analyzed the characteristics of the mass flow rate and velocity of the refrigerant in response to a change in the number of holes and the diameter size(Type-1～4) of the valve guide refrigerant to flow from Pc to Ps when the pressure is constant. Type-1 is 40% higher mass flow flowing in the direction of Ps as compared with the Pc mass flow rate. Type-2 is 64% higher mass flow flowing in the direction of Ps as compared with the Pc mass flow rate. Type-3 is 50% higher mass flow flowing in the direction of Ps as compared with the Pc mass flow rate. Type-4 is 47% higher mass flow flowing in the direction of Ps as compared with the Pc mass flow rate.

Abstract
 1. 서론
 2. 유동 해석 모델 및 조건
 3. 유동 해석 결과
  3.1 Type-1
  3.2 Type-2
  3.3 Type-3
  3.4 Type-4
 4. 결론
 후기
 References

• 김대영(국립 공주대학교 대학원 기계공학과) | D. Y. Kim
• 조행묵(국립 공주대학교 기계자동차공학부) | H. M. Cho Corresponding Author