scholarly journals Numerical modelling and performance maps of a printed circuit heat exchanger for use as recuperator in supercritical CO2 power cycles

2019 ◽  
Vol 161 ◽  
pp. 472-479 ◽  
Author(s):  
Matteo Marchionni ◽  
Lei Chai ◽  
Giuseppe Bianchi ◽  
Savvas A. Tassou
Keyword(s):  
Heat Exchanger ◽  
Numerical Modelling ◽  
Supercritical Co2 ◽  
Power Cycles ◽  
Printed Circuit ◽  
And Performance

scholarly journals Supercritical CO2 Heat Exchanger Fouling and its Impact on RCBC Efficiency

2018 ◽  
Author(s):  
Darryn Fleming ◽  
Kirsten Norman ◽  
Salvador Rodriguez ◽  
James Pasch ◽  
Matthew Carlson ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Pressure Drop ◽  
Supercritical Co2 ◽  
Critical Factor ◽  
Power Production ◽  
Working Fluid ◽  
Power Cycles ◽  
Power Cycle ◽  
Printed Circuit ◽  
Overall Efficiency

As supercritical carbon dioxide (sCO2) is emerging as a potential working fluid in power production Brayton cycles, fluid purity within the power cycle loops has become an issue impacting commercialization. Sandia National Laboratories has been evaluating the longevity of sCO2 recompression closed Brayton power cycles to quantify the advantages of sCO2 over other fluids as utilizing sCO2 yields comparatively greater efficiencies. Hydrocarbon plugging has been observed in the small printed circuit heat exchanger channels of our high temperature recuperator, increasing pressure drop across the heat exchanger. As pressure drop is a critical factor in the overall efficiency of sCO2 recompression closed Brayton cycles, in this paper we report on our investigation into heat exchanger efficiency reduction from hydrocarbon plugging induced pressure drop.

Application of Supercritical Carbon Dioxide for Solar Water Heater

2017 ◽  
pp. 215-234
Author(s):  
Yuhiro Iwamoto ◽  
Hiroshi Yamaguchi
Keyword(s):  
Heat Exchanger ◽  
Solar Collector ◽  
Supercritical Co2 ◽  
Large Change ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Small Change ◽  
And Performance ◽  
Main Components

For supercritical CO2, a small change in temperature or pressure can result in large change in density, especially in the state close to the critical point. The large change in density can easily induce the natural convective flow. In this chapter, a solar water heater using supercritical CO2 which is originally designed and constructed will be introduced. The solar water heater is a closed loop system with main components of an evacuated solar collector and a heat exchanger. The working fluid of CO2 is naturally driven by the large change in density with absorbing and transporting heat in the solar collector. And the heat energy (hot water) is produced by exchanging the transferred heat with water in the heat exchanger. This chapter will describe the typical system operation and performance at different season and climates.

scholarly journals Modeling and analysis of a printed circuit heat exchanger for supercritical CO2 power cycle applications

2016 ◽  
Vol 109 ◽  
pp. 861-870 ◽  
Author(s):  
Ajinkya Meshram ◽  
Ankush Kumar Jaiswal ◽  
Sagar D. Khivsara ◽  
Jesus D. Ortega ◽  
Clifford Ho ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Supercritical Co2 ◽  
Modeling And Analysis ◽  
Power Cycle ◽  
Printed Circuit
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