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자료유형
학술대회자료
저자정보
배석정 (자동차부품연구원) 허형석 (자동차부품연구원) 조성일 (자동차부품연구원) 박정상 (두원공조) 이홍열 (두원공조)
저널정보
한국자동차공학회 한국자동차공학회 추계학술대회 및 전시회 2012년 한국자동차공학회 학술대회 및 전시회
발행연도
2012.11
수록면
160 - 166 (7page)

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The optimum design of the low-temperature condenser of a dual-loop waste heat recovery system with Rankine steam cycles for improving the fuel efficiency of gasoline automobiles has been investigated. The waste heat recovery system consists of a high-temperature (HT) loop in which water as the HT working fluid recovers waste heat only from the exhaust gas of about 700℃ and a low-temperature (LT) loop in which a refrigerant as the LT working fluid recovers heat dissipation from the HT loop, and waste heat from the engine coolant of relatively low temperature. The low temperature condenser plays a role to dissipate heat from the system by condensing the low temperature loop working fluid sufficiently. However, the refrigerant has low evaporation temperature enough to recover the waste from engine coolant but has small saturation enthalpy so that excessive mass flow rate of the LT working fluid, e.g., over 150 g/s, causes the enormously large pressure drop of the working fluid to maintain the heat dissipation performance of more than 20 kW. This paper has dealt with the scheme to design the low temperature condenser that has reduced pressure drop while ensuring the required thermal performance from the waste heat recovery system. For the purpose of the performance predictions and the parametric study for the LT condenser, we have developed a 1-dimensional user-friendly performance prediction program that calculates feasibly the phase change of the working fluid in the tubes. Sustaining the scale of the existing vehicle refrigerant condenser, the number of pass, arrangement of the tubes of each pass and the structural design to enhance the flow uniformity through all the tubes of the multi-flow type low temperature condenser were analytically investigated.

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Abstract
1. 서론
2. 저온 응축기의 역할
3. 저온 응축기 설계
4. 결론
References

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UCI(KEPA) : I410-ECN-0101-2014-556-000417523