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CLC number: TB61
On-line Access: 2011-02-08
Received: 2010-05-05
Revision Accepted: 2010-07-22
Crosschecked: 2011-01-06
Cited: 12
Clicked: 6395
Experimental evaluation of the effect of an internal heat exchanger on a transcritical CO2 ejector system
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Xiao-xiao Xu, Guang-ming Chen, Li-ming Tang, Zhi-jiang Zhu, Shuang Liu. Experimental evaluation of the effect of an internal heat exchanger on a transcritical CO2 ejector system[J]. Journal of Zhejiang University Science A, 2011, 12(2): 146-153.
@article{title="Experimental evaluation of the effect of an internal heat exchanger on a transcritical CO2 ejector system",
author="Xiao-xiao Xu, Guang-ming Chen, Li-ming Tang, Zhi-jiang Zhu, Shuang Liu",
journal="Journal of Zhejiang University Science A",
volume="12",
number="2",
pages="146-153",
year="2011",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1000212"
}
%0 Journal Article
%T Experimental evaluation of the effect of an internal heat exchanger on a transcritical CO2 ejector system
%A Xiao-xiao Xu
%A Guang-ming Chen
%A Li-ming Tang
%A Zhi-jiang Zhu
%A Shuang Liu
%J Journal of Zhejiang University SCIENCE A
%V 12
%N 2
%P 146-153
%@ 1673-565X
%D 2011
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1000212
TY - JOUR
T1 - Experimental evaluation of the effect of an internal heat exchanger on a transcritical CO2 ejector system
A1 - Xiao-xiao Xu
A1 - Guang-ming Chen
A1 - Li-ming Tang
A1 - Zhi-jiang Zhu
A1 - Shuang Liu
J0 - Journal of Zhejiang University Science A
VL - 12
IS - 2
SP - 146
EP - 153
%@ 1673-565X
Y1 - 2011
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1000212
Abstract: This study presents experimental results focused on a performance comparison of a transcritical CO2 ejector system without an internal heat exchanger (IHX) (EJE-S) to a transcritical CO2 ejector system with an IHX (EJE-IHX-S). The comparison includes the effects of changes in operating conditions such as cooling water flow rate and inlet temperature. Experiments are conducted to assess the influence of the IHX on the heating coefficient of performance (COPr), heating capacity, entrainment ratio, pressure lift, and other parameters. The primary flow rate of the EJE-IHX-S is higher than that of the EJE-S. The pressure lift and actual ejector work recovery are reduced when the IHX is added to the transcritical CO2 ejector system. Using a more practical performance calculation, the compression ratio in the EJE-S is reduced by 10.0%–12.1%, while that of EJE-IHX-S is reduced only by 5.6%–6.7% compared to that of a conventional transcritical CO2 system. Experimental results are used to validate the findings that the IHX weakens the contribution of the ejector to the system performance.
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