Analysis of the operational characteristics and limits of a loop heat pipe with porous element in the condenser

This paper analyzes the operational characteristics and limits of a loop heat pipe (LHP) with flat porous elements in the condenser and evaporator. A mathematical model, based on the nodal method, was developed to simulate the thermal and hydrodynamic behavior of this specific type of LHP. Previousl...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2001-06, Vol.44 (12), p.2287-2297
Main Authors: Muraoka, I, Ramos, F.M, Vlassov, V.V
Format: Article
Language:English
Subjects:
Applied sciences
Condensers (liquefiers)
Devices using thermal energy
Energy
Energy. Thermal use of fuels
Evaporators
Exact sciences and technology
Heat losses
Heat pipes
Heat sinks
Heat transfer
Mass transfer
Mathematical models
Porous materials
Thermal load
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Summary:This paper analyzes the operational characteristics and limits of a loop heat pipe (LHP) with flat porous elements in the condenser and evaporator. A mathematical model, based on the nodal method, was developed to simulate the thermal and hydrodynamic behavior of this specific type of LHP. Previously, the model was verified and validated by experiential data [I. Muraoka, F.M. Ramos, V. Vlassov, Int. Commun. Heat Mass Transfer 25 (1998) 1085]. The dry-out failure mechanisms of this device were investigated and its operational limits identified in terms of the heat load dissipated in the evaporator and the heat sink temperature at the condenser. Three distinct operational regimes were identified and characterized, taking into account the volume of vapor in the liquid core of the evaporator and the capillary pressure limit.
ISSN:0017-9310
1879-2189
DOI:10.1016/S0017-9310(00)00259-3