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Experimental investigation on heat transfer performance of multi-bent sodium heat pipe
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NETL
NSTL
Elsevier
The heat pipe cooled reactor utilizes the phase change of the working fluid inside the heat pipes to conduct the fission heat from the core to the power generation system. The work presented herein is based on high-temperature sodium heat pipes with multi-bent structures. The transient response effects of start-up and capillary limit of the heat pipes are primarily investigated. Furthermore, the local isothermal performance during steady state operation under various operating conditions is discussed. The equivalent thermal conductivity reaches 8.51 x 10(4) similar to 1.13 x 10(5) W<middle dot>m(-1)<middle dot>K-1 under the condition of positive inclination angle of 15 degrees. The more effective the cooling in the condensation environment, the larger the temperature difference between the evaporation and condensation sections of the heat pipe. Under transient conditions, the temperature response of the evaporation section of the bent heat pipe is consistent with that of the straight heat pipe's evaporation section. The temperature response of the condensation section at the bent end is more rapid compared to the evaporation section. However, fluctuations in temperature are observed in both steady - state and transient conditions.High-temperature bent screen-wick heat pipes exhibit safety under maritime cyclic oscillations. Marine heat pipe-cooled reactors necessitate a comprehensive assessment of the operational temperature range for the power system and the reactor core structure to evaluate the acceptable level of temperature losses, thereby determining the adoption of bent heat pipe configurations to enhance system compactness.
NETL
NSTL
Elsevier
