Mathematical Modeling and Analysis of Heat Pipe Start-Up From the Frozen State
Author(s) -
JerHuan Jang,
Amir Faghri,
W.S. Chang,
E. T. Mahefkey
Publication year - 1990
Publication title -
journal of heat transfer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.722
H-Index - 126
eISSN - 1528-8943
pISSN - 0022-1481
DOI - 10.1115/1.2910427
Subject(s) - condenser (optics) , evaporator , mechanics , heat pipe , vaporization , condensation , transient (computer programming) , materials science , flow (mathematics) , thermodynamics , mechanical engineering , heat transfer , engineering , computer science , physics , heat exchanger , light source , optics , operating system
The start-up process of a frozen heat pipe is described and a complete mathematical model for the start-up of the frozen heat pipe is developed based on the existing experimental data. The model is simplified and solved numerically. The two-dimensional transient model for the wall and wick is coupled with the one-dimensional transient model for the vapor flow when vaporization and condensation occur at the interface. A parametric study is performed to examine the effect of the boundary specification at the surface of the outer wall on the successful start-up from the frozen state. For successful start-up, the boundary specification at the outer wall surface must melt the working substance in the condenser before dryout takes place in the evaporator.
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