CO<sub>2</sub> Pressure Drop and Heat Transfer Characteristics in Micro-Channel Gas Cooler

您当前的位置：

首页 >

文章列表页 >

CO₂ Pressure Drop and Heat Transfer Characteristics in Micro-Channel Gas Cooler

更新时间：2025-07-09

- CO₂ Pressure Drop and Heat Transfer Characteristics in Micro-Channel Gas Cooler
- Vol. 44, Issue 9, Pages: 48-53(2010)
- 作者机构：
  
  华南理工大学机械与汽车工程学院,广州,510641
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB657.5
- Online First：10 September 2010，
  
  Published：2010
- 稿件说明：
移动端阅览
CO₂ Pressure Drop and Heat Transfer Characteristics in Micro-Channel Gas Cooler[J]. 2010, 44(9): 48-53.
DOI：

CO₂ Pressure Drop and Heat Transfer Characteristics in Micro-Channel Gas Cooler[J]. 2010, 44(9): 48-53. DOI：

摘要

在微通道平行流式气冷器内进行了CO

的压降和换热特性实验研究

探讨了跨临界CO

循环换热过程中制冷剂质量流量、系统压力对气冷器换热性能、进出口压降的影响.实验结果表明:在接近临界温度时

物理性能受压力和温度的影响较大

换热系数是远离临界区的7～9倍; 随着CO

质量流量的提高

微通道管内流体Re相应提高

而较高的Re又使得湍流扩散率、管内温度梯度增大

同时在制冷剂入口附近的微通道换热器高温区域面积增大

表明当系统压力相同时

制冷剂入口温度随CO

质量流量的增加而增大.在一定的质量流量或压力下

存在着一个最佳的压力或质量流量

使得气冷器进出口压降达到最小.随着Re增加

气冷器的CO

压降关联式的预测精度均有所提高

为此提出了新的换热关联式和压降关联式.

Abstract

The pressure drop and heat transfer characteristics of a micro-channel gas cooler were studied with the trans-critical CO

cycle. The influence of the CO

mass flowrate and the pressure difference of the inlet and the outlet on the heat transfer performance of the gas cooler was experimentally investigated. The results show that the thermal physical properties of carbon dioxide were affected significantly by the fluid pressure and temperature near the critical temperature

and the heat transfer coefficient was 7-9 times that at the other area far from the critical area. The Reynolds number in the micro-channels increased with the increase in CO

mass flowrate

leading to the increase in the turbulent diffusion rate and the increase i

n the temperature gradient inside the tube. The region edge with relative higher refrigerant temperature near the entrance extended

indicating that the inlet refrigerant temperature increased with the CO

mass flowrate at the same system inlet pressure. At a certain mass flowrate or inlet pressure

there was an optimum pressure value or CO

mass flowrate value to generate a minimum pressure drop in the system. The results obtained by correlation formulas were compared

and then a new heat transfer correlation and a new pressure drop correlation were proposed.

关键词

Keywords

references

POLYAKOV A F. Heat transfer under supercritical pressures [J].Adv Heat Transf, 1991(21):1-53.

PETUKHOV B S. Heat transfer and friction in turbulent pipe flow with variable physical properties[J]. Adv Heat Transf, 1970(6):503-564.

HALL W B. Heat transfer near the critical point [J]. Adv Heat Transf, 1971(7):1-86.

PIORO I L, KHARTAILH F, DUFFEY R B. Experimental heat transfer of supercritical carbon dioxide flowing inside channels: survey [J]. Nucl Eng Des, 2005(235):913-924.

DUFFEY R B, PIORO I L. Heat transfer to supercritical fluids flowing in channels-empirical correlations: survey [J]. Nucl Eng Des, 2004(230):69-91.

PITLA S S, ROBINSON D M, GROLL E A G, et al. Heat transfer from supercritical carbon dioxide in tube flow: a critical review[J]. Int J HVAC R Res, 1998,4(3):281-301.

FANG X, BULLARD C B, HRNJAK P S. Heat transfer and pressure drop of gas coolers[J]. ASHRAE Trans, 2001,107(1):255-266.

刘洪胜, 金纪峰, 陈江平, 等. 自然工质CO2汽车空调性能的实验研究[J].上海交通大学学报, 2006,40(8):1407-1411.

LIU Hongsheng, JIN Jifeng, CHEN Jiangping, et al. Experimental studies on transcritical CO2 automotive air conditioning systems [J].Journal of Shanghai Jiaotong University, 2006,40(8):1407-1411.

张后雷, 宣益民, 武金鼎, 等. 气-气式跨临界CO2空调系统研制 [J].低温与特气, 2002,20(2):36-39.

ZHANG Houlei, XUAN Yimin, WU Jinding, et al. Development of gas-gas transcritical carbon dioxide air-conditioning system [J].Low Temperature and Specialty Gases, 2002,20(2):36-39.

DITTUS F W, BOELTER L M K. Heat transfer in automobile radiators of tubular type [M]. Berkeley, CA, USA: University of California Press, 1930:443-461.

GNIELINSKI V. New equations for heat and mass transfer in turbulent pipe and channel flow[J]. Int Chem Eng, 1976(16):359-368.

DANG Chaobin, HIHARA E. In-tube cooling heat transfer of supercritical carbon dioxide [J]. Experimental Measurement Refrig, 2004(27):736-747.

KRASNOSHCHEKOV E A, KURAEVA I V, PROTOPOPOV V S. Local heat transfer of carbon dioxide at supercritical pressure under cooling conditions [J]. Teplofizika Vysokikh Temperature,1969,7(5):922-930.

BLASIUS H. Das ahnlichkeitsgesets bei reibungsvorganen in flussigkeiten [M]. Berlin, Germany: Forsch Arb Ing-Wes,1913.

KURAEVA I V, PROTOPOPOV V S. Mean friction coefficients for turbulent flow of a liquid at a supercritical pressure in horizontal circular tubes [J]. Teplofizika Vysokikh Temperature, 1974,12(1):218-220.

WANG H, TOUBER S. Distributed and non-steady-state modeling of an air cooler [J]. International Journal of Refrigeration, 1991(14):98-111.

爆炸极限实验系统研制及二甲醚/HFC125的可燃性研究. 西安交通大学学报,2010,44(7):28-32.

采用PR方程的液相制冷剂摩擦理论黏度模型. 西安交通大学学报,2010,44(5):10-14.

风速分布对双排管两流路蒸发器性能影响的模拟研究. 西安交通大学学报.2010,44(2)108-112.

HCF141b乳液及微乳液体系水合物生成过程实验研究. 西安交通大学学报,2010,44(2)119-124.

过冷度对喷嘴效率影响的测试研究. 西安交通大学学报,2009,43(11):18-21.

混合制冷剂R134a/R600a与矿物油互溶性的实验研究. 西安交通大学学报,2009,43(9):5-8.

培尔顿式膨胀机的实验研究. 西安交通大学学报,2009,43(9):95-99.

丙烷和丙烯用于低温冷柜的性能和充灌量研究. 西安交通大学学报,2009,43(9):104-108.

R22与R410A热泵中蒸发器性能随支路数变化的比较. 西安交通大学学报,2009,43(7):58-62.

振动盘黏度计的改进及R152a气相黏度实验研究. 西安交通大学学报,2008,42(11):1424-1428.

含油制冷剂R134a饱和液相运动黏度及表面张力实验测量. 西安交通大学学报,2008,42(9):1065-1069.

应用纳米添加剂的冰箱性能实验研究. 西安交通大学学报,2008,42(7):852-854.

自复叠制冷循环双温冰箱设计的理论研究. 西安交通大学学报,2008,42(5):551-555.

制冷系统中水平管降膜式蒸发器内部流动数值模拟. 西安交通大学学报,2008,42(3):318-322.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Calculation of Pressure Drop and Outlet Steam Temperature of Water Wall Pipes for Supercritical Once-Through Boiler

Experimental Research on Pressure Drop in Elbows in Dense Phase Pneumatic Conveying of Pulverized Coal at High Pressure Using CO2/N2 as Carriers

Simulation of the Dual2Evaporator Refrigerator Cars SystemUsing New Refrigerant R404A

Numerical Simulation of Gas-Liquid Two-Phase Flow in a T-Junction Micro-Channel

Heat Transfer Enhancement in Micro-channel with Dimples and Protrusions

Related Author

邵国桢 2

边宝 2

徐良洪 2

周旭 1

杨冬 1

卢欢 1

王建豪 1

陈先梅 1

Related Institution

State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University

School of Energy and Environment, Southeast University

(School of Energy and Power Engineering , Xi′an Jiaotong University , Xi′an ,)

School of Energy and Power Engineering, Xi'an Jiaotong University

⁰

CO2 Pressure Drop and Heat Transfer Characteristics in Micro-Channel Gas Cooler

DOI：

摘要

Abstract

关键词

Keywords

references

CO₂ Pressure Drop and Heat Transfer Characteristics in Micro-Channel Gas Cooler