지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 1998.11
- 수록면
- 396 - 401 (6page)
이용수
초록· 키워드
오류제보하기
Recently, it is focused on what high performance, compactness. low pressure loss and low production cost are capable by employing multipass tube with small diameter tube as an evaporator. In the multipass evaporator, however, maldistribution of refrigerant two-phase flow generally occurs and evaporator performance forced to be below it's optimum point. Because of this complexity of two-phase flow distribution, it still remains as a crucial issue in phase change two-phase flow phenomena.
In this paper, a new method for two-phase flow distribution was proposed. Experimental study has been performed using a half-flooded distributor which has four vertical upward tubes submerged into the liquid of the distributor and also, main supply and outflow pipes are attached on the top of the distributor. The distributor is the device that makes uniform flow distribution in all branches from distributor of heat exchangers. Experimental tests have been performed in order to investigate the flow distribution characteristics in the distributor which have 4 pipe branches. Each branch was made of a small diameter tube of 5.35 ㎜ inside diameter. This construction simulated evaporators for air-conditioning, refrigeration systems, and HFC-22 was used as working fluid. Experimental results showed that the flow distribution ratio varied with the pressure of the distributor. Furthermore the parameters affected on liquid distribution were the pressure of the distributor as well as mass flow rate into the distributor. And also uniform liquid surface maintained during the optimum ranges of the pressure in the distributor.
In this paper, a new method for two-phase flow distribution was proposed. Experimental study has been performed using a half-flooded distributor which has four vertical upward tubes submerged into the liquid of the distributor and also, main supply and outflow pipes are attached on the top of the distributor. The distributor is the device that makes uniform flow distribution in all branches from distributor of heat exchangers. Experimental tests have been performed in order to investigate the flow distribution characteristics in the distributor which have 4 pipe branches. Each branch was made of a small diameter tube of 5.35 ㎜ inside diameter. This construction simulated evaporators for air-conditioning, refrigeration systems, and HFC-22 was used as working fluid. Experimental results showed that the flow distribution ratio varied with the pressure of the distributor. Furthermore the parameters affected on liquid distribution were the pressure of the distributor as well as mass flow rate into the distributor. And also uniform liquid surface maintained during the optimum ranges of the pressure in the distributor.
목차
ABSTRACT
1. 서론
2. 해석
3. 실험 장치 및 방법
4. 실험결과 및 고찰
5. 결과 및 고찰
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