Mathematical modeling and analysis of heat pipe start-up from the frozen state

Journal Article · Wed Aug 01 00:00:00 EDT 1990 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2910427· OSTI ID:5288426

Jang, J H; Faghri, A ^[1]; Chang, W S; Mahefkey, E T ^[2]

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1. Wright State Univ., Dayton, OH (USA)
2. Wright Research and Development Center, Wright-Patterson AFB, OH (USA)

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.

• OSTI ID: 5288426
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Vol. 112:3; ISSN 0022-1481
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ELECTRONIC EQUIPMENT
COOLING
HEAT PIPES
MATHEMATICAL MODELS
START-UP
HEAT EXCHANGERS
LIQUID METALS
ONE-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL CALCULATIONS
ELEMENTS
EQUIPMENT
FLUIDS
LIQUIDS
METALS
420400* - Engineering- Heat Transfer & Fluid Flow