TY - JOUR
T1 - The steady behavior of the supercritical carbon dioxide natural circulation loop
AU - Draskic, Marko
AU - Bugeat, Benjamin
AU - Pecnik, Rene
PY - 2023
Y1 - 2023
N2 - The steady state behavior of thermodynamically supercritical natural circulation loops (NCLs) is investigated in this work. Experimental steady state results with supercritical carbon dioxide are presented for reduced pressures in the range of 1.1-1.5, and temperatures in the range of 20-65 ◦C. Distinct thermodynamic states are reached by traversing a set of isochors. A generalized equation for the prediction of the steady state is presented, and its performance is assessed using empirical data. Changes of mass flow rate as a result of changes of thermodynamic state, heating- and driving height are shown to be accurately captured by the proposed predictive equation. However, the enhanced viscous losses in the instrumentation of the loop and in the proximity of heat transfer equipment are shown to significantly limit the steady state flow rate. Subsequently, the findings are put forward in aid of the development of safe, novel supercritical natural circulation facilities.
AB - The steady state behavior of thermodynamically supercritical natural circulation loops (NCLs) is investigated in this work. Experimental steady state results with supercritical carbon dioxide are presented for reduced pressures in the range of 1.1-1.5, and temperatures in the range of 20-65 ◦C. Distinct thermodynamic states are reached by traversing a set of isochors. A generalized equation for the prediction of the steady state is presented, and its performance is assessed using empirical data. Changes of mass flow rate as a result of changes of thermodynamic state, heating- and driving height are shown to be accurately captured by the proposed predictive equation. However, the enhanced viscous losses in the instrumentation of the loop and in the proximity of heat transfer equipment are shown to significantly limit the steady state flow rate. Subsequently, the findings are put forward in aid of the development of safe, novel supercritical natural circulation facilities.
UR - http://www.scopus.com/inward/record.url?scp=85164916172&partnerID=8YFLogxK
U2 - 10.17185/duepublico/77307
DO - 10.17185/duepublico/77307
M3 - Conference article
AN - SCOPUS:85164916172
SN - 2510-7852
SP - 217
EP - 225
JO - Conference Proceedings of the European sCO2 Conference
JF - Conference Proceedings of the European sCO2 Conference
T2 - 5th European Supercritical CO2 Conference for Energy Systems, 2023
Y2 - 14 March 2023 through 16 March 2023
ER -