CO2 가스쿨러용 콤팩트열교환기 개발에 관한 연구(1) -다중관식 헬리컬 코일형 가스냉각기내 CO2의 열유량과 압력강하-
Experimental Study on Compact type CO2 Gas Cooler(1) - Heat Flowrate and Pressure Drop in a Multi-Tube-In-Tube Helical Coil Type Gas Cooler -
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초록
다중관식 헬리컬 코일형 가스냉각기내 CO2의 열유량과 압력강하에 대해서 실험적으로 조사하였다. CO2와 냉각수의 유량은 각각 0.06~0.075 kg/s이고, 가스냉각기의 냉각압력은 8~10 MPa이다. CO2의 열유량은 냉각수 질량유량, CO2의 질량유량과 냉각압력에 비례하여 증가한다. CO2의 압력강하는 냉각수와 CO2의 질량유량이 감소할수록 감소하지만, CO2의 냉각압력이 증가할수록 감소한다. 다중관식 헬리컬 코일형 가스냉각기내 CO2의 열유량과 압력강하는 각각 이중관식 가스냉각기보다 상당히 높게또는 낮게 나타났다. 따라서 다중관식 헬리컬 코일형 가스냉각기에 CO2를 적용하는 경우에는 가스냉각기의 고효율화, 고성능화, 컴팩트화가 가능할 것이다.
Abstract
The heat flowrate and pressure drop of CO2 in a multi-tube-in-tube helical coil type gas cooler were investigated experimentally. The mass flowrate of CO2 and coolant were varied from 0.06 to 0.075 [kg/s], respectively and the cooling pressure of gas cooler were from 8 to 10 [MPa]. The heat flowrate of CO2 in the test section is increased with the increase in mass flowrate of coolant, the cooling pressure and mass flowrate of CO2. The pressure drop of CO2 is decreased with the decrease in mass flowrate of coolant and CO2, but decreased with increase in cooling pressure of CO2. The heat flowrate of CO2 in the multi-tube-in-tube helical coil type gas cooler is greatly higher than that of CO2 in the double pipe type gas cooler, while the pressure drop of CO2 in the multi-tube-in-tube helical coil type gas cooler is greatly lower than that of CO2 in the double pipe type gas cooler. Therefore, in case of the application of CO2 at the multi-tube-in-tube helical coil type gas cooler, it is expected to carry out the high-efficiency, high-performance and compactness of gas cooler.
참고문헌 (8)
- L. Yun, "Two- phase flow patterns of CO2 in a narrow rectangular channel", pp.1~7 (2003), Int. Congress of Refrigeration
- G. Lorentzen, "A new, efficient and environmentally benign system for car air-conditioning", Int. J. of Refrigeration, 16(1), pp.4~12 (1993)
- B. Yun, "Air-conditioner cycle simulation using tube-by-tube method", Korean Journal of Air-Conditioning and Refrigeration Engineering, 11(4), pp.499~510 (1999)
- Z. Yuan, "Forced Convection Boiling Heat Transfer of CO2 in Horizontal Tubes", Ⅹth ASME, 1999, ~
- A. M. K. Bredesen, "Studies on CO2 heat exchangers and heat transfer", IEA, 1997, ~
- S. S. Pitla, "Heat Transfer from Supercritical Carbon Dioxide in Tube Flow", A Critical Review, HVAC＆R research, 4(4), pp.281~301 (1998)
- D. A. Olson, "Heat transfer of supercritical carbon dioxide flowing in a cooled horizontal tube", Preliminary Proceedings of the 4th IIR-Gustav Lorentzen Conference on Natural Working Fluids at Purdue, pp.251~258 (2000)
- S. J. Kline, "Describing Uncertainties in Single Sample Experiments", Mechanical Engineering, 75(1), pp.3~12 (1953)