Transient analysis of subcritical/supercritical carbon dioxide based natural circulation loop with end heat exchangers: experimental study

2017 ◽  
Vol 53 (9) ◽  
pp. 2951-2960 ◽  
Author(s):  
Ajay Kumar Yadav ◽  
Maddali Ramgopal ◽  
Souvik Bhattacharyya
Keyword(s):  
Carbon Dioxide ◽  
Experimental Study ◽  
Supercritical Carbon Dioxide ◽  
Heat Exchangers ◽  
Transient Analysis ◽  
Natural Circulation ◽  
Circulation Loop ◽  
Natural Circulation Loop ◽  
Supercritical Carbon

Lead-to-CO2 Heat Exchangers for Coupling of the STAR-LM LFR to a Supercritical Carbon Dioxide Brayton Cycle Power Converter

2004 ◽  
Author(s):  
Anton V. Moisseytsev ◽  
James J. Sienicki ◽  
David C. Wade
Keyword(s):  
Carbon Dioxide ◽  
Heat Exchanger ◽  
Supercritical Carbon Dioxide ◽  
Heat Exchangers ◽  
High Efficiency ◽  
Natural Circulation ◽  
Power Converter ◽  
Working Fluid ◽  
Brayton Cycle ◽  
Supercritical Carbon

Recent development of the Secure Transportable Autonomous Reactor-Liquid Metal (STAR-LM) lead-cooled natural circulation fast reactor (LFR) has been directed at coupling to an advanced power conversion system that utilizes a gas turbine Brayton cycle with supercritical carbon dioxide (S-CO2) as the working fluid. A key ingredient in achieving a coupled plant having a high efficiency are the modular lead-to-CO2 heat exchangers that must fit within the available volume inside the reactor vessel and must heat the S-CO2 to a high temperature. Thermal hydraulic performance and feasibility of seven different heat exchanger concepts has been investigated with respect to the achievement of a suitably high Brayton cycle efficiency for the coupled LFR-S-CO2 plant. The relative merits of the different heat exchanger configurations are revealed by the analysis which provides a basis to select the most promising concepts for further development.

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