An experimental study on heat transfer between supercritical carbon dioxide and water near the pseudo-critical temperature in a double pipe heat exchanger
Document Type
Article
Publication Date
1-1-2016
Publication Title
International Journal of Heat and Mass Transfer
Volume
93
First page number:
379
Last page number:
387
Abstract
Supercritical carbon dioxide (SCO2) is a promising working fluid for the cryogenic refrigeration, air-condition and heat pump systems. The present study sets up a SCO2-water test loop to study the heat transfer performance of SCO2 in a double pipe heat exchanger. The effects of SCO2-side pressure, mass flux and buoyancy force as well as water-side mass flux are investigated. It is found that the total and SCO2-side heat transfer coefficients reduce as the SCO2-side pressure increases. The peak total and SCO2-side heat transfer coefficients appear at a higher temperature than the pseudo critical temperature. The water-side mass flux has a larger effect on the total heat transfer coefficient compared to the SCO2-side mass flux in the studied cases. The contribution of buoyancy force to the heat transfer performance is large at the small SCO2-side mass flux and it becomes smaller as the SCO2-side mass flux increases. The SCO2-side pressure and water-side mass flux have little effect on the buoyancy force. A heat transfer correlation that includes the effect of buoyancy force is obtained by fitting the experimental data with genetic algorithm. © 2015 Elsevier Ltd.
Keywords
Buoyancy force; Correlation; Double pipe heat exchanger; Heat transfer; Supercritical carbon dioxide
Language
English
Repository Citation
Ma, T.,
Chu, W. X.,
Xu, X. Y.,
Chen, Y.,
Wang, Q. W.
(2016).
An experimental study on heat transfer between supercritical carbon dioxide and water near the pseudo-critical temperature in a double pipe heat exchanger.
International Journal of Heat and Mass Transfer, 93
379-387.
http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.10.017