Session: K10-03: MULTI-SCALE MULTI-PHASE HEAT TRANSFER EQUIPMENT II

Paper Number: 138548

138548 - Simultaneous Measurement Between Pressure and Visualization of Geyser Boiling in Two-Phase Closed Thermosyphon 

Abstract: 

A two-phase closed thermosyphon is a type of heat pipe and is a device that transfers heat through phase changes of an internal working fluid. The mechanism for transferring heat through phase change of the working fluid is the same as that of the heat pipe, but gravity is used instead of the wick structure to recover liquid condensate. In general, thermosyphon has various operating limitations such as sonic limit, entry limit, and building limit, and many researchers have suggested various studies and correlations to overcome them. In addition to these operating limits, geyser boiling can cause the malfunction of the thermosyphon. Geyser boiling happens when liquid at the top of the bubble hits the top of the condenser due to the rapid growth of the bubble in the evaporator. It is considered a phenomenon to be avoided because it can cause fatigue and destruction of the device. However, there has been no research on the magnitude of the impact force generated by geyser boiling despite the possibility of causing fatigue failure. Therefore, in the present study, a load cell was installed at the top of the condenser of the thermosyphon to measure the corresponding impact force generated by geyser boiling. Simultaneous measurement between pressure and visualization distinguished the actual and pseudo geyser boiling phenomena.

Presenting Author: Jin Hyeuk Seo Ajou university

Presenting Author Biography: 2006. 3. – 2016. 8. Chungnam National University in Korea(bachelor's degree)
2016. 9. – 2018. 8. POSTECH in Korea (Master's degree)

Authors:

Jin Hyeuk Seo Ajou university
Jungho Lee Ajou university
Sukkyung Kang Ajou university