scholarly journals A122 Experimental Study on Supercritical Carbon Dioxide Flow in Gas-Coolers for Heat Pump Water Heaters

2012 ◽  
Vol 2012 (0) ◽  
pp. 11-12
Author(s):  
Yoshimi Matsuo ◽  
Masaya Ichihara ◽  
Shigeru KOYAMA ◽  
Kazuhiko Machida
Keyword(s):  
Carbon Dioxide ◽  
Experimental Study ◽  
Supercritical Carbon Dioxide ◽  
Heat Pump ◽  
Water Heaters ◽  
Supercritical Carbon

scholarly journals Experimental Study of the Heat Transfer of Supercritical Carbon Dioxide in Silica-based Porous Media

2014 ◽  
Vol 61 ◽  
pp. 914-917 ◽  
Author(s):  
J.C. Hsieh ◽  
B.H. Lee ◽  
David. T.W. Lin ◽  
M.C. Chung
Keyword(s):  
Heat Transfer ◽  
Carbon Dioxide ◽  
Experimental Study ◽  
Porous Media ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Carbon

Experimental study of water (Micro) droplet formation from its saturated solution in supercritical carbon dioxide

2014 ◽  
Vol 8 (7) ◽  
pp. 932-938
Author(s):  
B. V. Borts ◽  
Yu. G. Kazarinov ◽  
I. M. Neklyudov ◽  
S. A. Sirenko ◽  
S. F. Skoromnaya ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Experimental Study ◽  
Supercritical Carbon Dioxide ◽  
Droplet Formation ◽  
Saturated Solution ◽  
Supercritical Carbon

scholarly journals Modelling and Evaluation of the Thermohydraulic Performance of Finned-Tube Supercritical Carbon Dioxide Gas Coolers

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1031 ◽  
Author(s):  
Lei Chai ◽  
Konstantinos M. Tsamos ◽  
Savvas A. Tassou
Keyword(s):  
Heat Transfer ◽  
Carbon Dioxide ◽  
Pressure Drop ◽  
Supercritical Carbon Dioxide ◽  
Heat Pump ◽  
Life Cycle Cost ◽  
Flow Direction ◽  
Finned Tube ◽  
Distributed Modelling ◽  
Supercritical Carbon

This paper investigates the thermohydraulic performance of finned-tube supercritical carbon dioxide (sCO2) gas coolers operating with refrigerant pressures near the critical point. A distributed modelling approach combined with the ε-NTU method has been developed for the simulation of the gas cooler. The heat transfer and pressure drop for each evenly divided segment are calculated using empirical correlations for Nusselt number and friction factor. The model was validated against test results and then used to investigate the influence of design and operating parameters on local and overall gas cooler performance. The results show that the refrigerant heat-transfer coefficient increases with decreasing temperature and reaches its maximum close to the pseudocritical temperature before beginning to decrease. The pressure drop increases along the flow direction with decreasing temperature. Overall performance results illustrate that higher refrigerant mass flow rate and decreasing finned-tube diameter lead to improved heat-transfer rates but also increased pressure drops. Design optimization of gas coolers should take into consideration their impact on overall refrigeration performance and life cycle cost. This is important in the drive to reduce the footprint of components, energy consumption, and environmental impacts of refrigeration and heat-pump systems. The present work provides practical guidance to the design of finned-tube gas coolers and can be used as the basis for the modelling of integrated sCO2 refrigeration and heat-pump systems.

Experimental study of particle settling in supercritical carbon dioxide

2015 ◽  
Vol 100 ◽  
pp. 121-128 ◽  
Author(s):  
Lei Hou ◽  
Baojiang Sun ◽  
Zhiyuan Wang ◽  
Qingjian Li
Keyword(s):  
Carbon Dioxide ◽  
Experimental Study ◽  
Supercritical Carbon Dioxide ◽  
Particle Settling ◽  
Supercritical Carbon

Experimental study on heat transfer of supercritical carbon dioxide in a long silica-based porous-media tube

2016 ◽  
Vol 53 (3) ◽  
pp. 995-1004 ◽  
Author(s):  
Jui-Ching Hsieh ◽  
David T. W. Lin ◽  
Bo-Heng Lee ◽  
Ming-Che Chung
Keyword(s):  
Heat Transfer ◽  
Carbon Dioxide ◽  
Experimental Study ◽  
Porous Media ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Carbon
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