Printed circuit heat exchanger thermal-hydraulic performance in supercritical CO2 experimental loop
Printed circuit heat exchanger thermal-hydraulic performance in supercritical CO2 experimental loop
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DOI：
10.1016/j.ijrefrig.2005.11.005
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发表时间：
2006-08-01
期刊：
影响因子：
--
通讯作者：
Ngo, Lam
中科院分区：
文献类型：
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作者：
Nikitin, Konstantin;Kato, Yasuyoshi;Ngo, Lam
在实验的超临界CO2循环中，研究了印制电路换热器(PCHE)的传热和压降特性。进口温度和压力分别为280~300℃/2.2~3.2 Mpa和90~108℃/6.5~10.5 Mpa，质量流量为40~80 kg h(-1)。总的换热系数范围为300~650W·m~(-2)K~(-1)，换热器芯的致密性约为1050m~(-2)m~(-3)。提出了预测局部换热系数和压降系数随雷诺数变化的经验关联式。(C)2005年爱思唯尔有限公司和IIR。版权所有。
Heat transfer and pressure drop characteristics of the Printed Circuit Heat Exchanger (PCHE) were investigated in an experimental supercritical CO2 loop. The inlet temperature and pressure were varied from 280 to 300 degrees C/2.2 to 3.2 MPa in the hot side and from 90 to 108 degrees C/6.5 to 10.5 MPa in the cold side while the mass flow rate was varied from 40 to 80 kg h(-1). The overall heat transfer coefficient range is 300-650 W m(-2) K-1 while the compactness with respect to the heat exchanger core is approximately 1050 m(2) m(-3). The empirical correlations to predict the local heat transfer coefficient and pressure drop factor as a function of the Reynolds number have been proposed for the tested PCHE. (c) 2005 Elsevier Ltd and IIR. All rights reserved.