Analytical Model for Transient Loop Heat Pipe Operation

Hoang, Triem T.; Baldauff, Robert W.; Mahony, Denis R.

doi:10.2514/6.2015-0707

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…A good attempt is to design an eccentric evaporator/CC assembly as shown in Fig. 15b, which can mitigate the liquid drainage issue in the CC, especially when CC has a larger diameter than evaporator [52,[57][58]. It also indicates that both evaporator-CC assembly design and fluid inventory computation can be considered for future ME-LHP design improvements and applications.…”

Section: Capillary Limitmentioning

confidence: 99%

A review of thermal performance in multiple evaporators loop heat pipe

Wang

YiShui

2018

Applied Thermal Engineering

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Section: Capillary Limitmentioning

confidence: 99%

A review of thermal performance in multiple evaporators loop heat pipe

Wang

YiShui

2018

Applied Thermal Engineering

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“…Using different models would require a better understanding of mass and heat transfer across the wick. Later, Hoang, Baldauff, and Mahony [88] presented an improved version of this model. Kaya et al [92] presented another transient model, which is based upon the one-dimensional transient conservation equations.…”

Section: Chapter 5: Transient Modelmentioning

confidence: 99%

“…In addition, the velocity at the downstream junction (j+1) is calculated via the mass conservation, Eq. (88). Forth, the temperature of the solid cell(s) is calculated by analytically solving the energy equation as previously described.…”

Section: Single-phase Algorithmmentioning

confidence: 99%

Transient Mathematical Modelling of Loop Heat Pipes and Experimental Validation

Jazebizadeh¹

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Modeling, Design, and Optimization of Loop Heat Pipes

Zhao,

Wei,

Dan

2024

Energies

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Thermal management technology based on loop heat pipes (LHPs) has broad application prospects in heat transfer control for aerospace and new energy vehicles. LHPs offer excellent heat transfer performance, reliability, and flexibility, making them suitable for high-heat flux density, high-power heat dissipation, and complex thermal management scenarios. However, due to limitations in heat source temperature and heat transfer power range, LHP-based thermal management systems still face challenges, especially in thermohydraulic modeling, component design, and optimization. Steady-state models improve computational efficiency and accuracy, while transient models capture dynamic behavior under various conditions, aiding performance evaluation during start-up and non-steady-state scenarios. Designs for single/multi-evaporators, compensation chambers, and wick materials are also reviewed. Single-evaporator designs offer compact and efficient start-up, while multi-evaporator designs handle complex thermal environments with multiple heat sources. Innovations in wick materials, such as porous metals, composites, and 3D printing, enhance capillary driving force and heat transfer performance. A comprehensive summary of working fluid selection criteria is conducted, and the effects of selecting organic, inorganic, and nanofluid working fluids on the performance of LHPs are evaluated. The selection process should consider thermodynamic properties, safety, and environmental friendliness to ensure optimal performance. Additionally, the mechanism and optimization methods of the start-up behavior, temperature oscillation, and non-condensable gas on the operating characteristics of LHPs were summarized. Optimizing vapor/liquid distribution, heat load, and sink temperature enhances start-up efficiency and minimizes temperature overshoot. Improved capillary structures and working fluids reduce temperature oscillations. Addressing non-condensable gases with materials like titanium and thermoelectric coolers ensures long-term stability and reliability. This review comprehensively discusses the development trends and prospects of LHP technology, aiming to guide the design and optimization of LHP.

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Analytical Model for Transient Loop Heat Pipe Operation

Cited by 3 publications

References 2 publications

A review of thermal performance in multiple evaporators loop heat pipe

A review of thermal performance in multiple evaporators loop heat pipe

Transient Mathematical Modelling of Loop Heat Pipes and Experimental Validation

Modeling, Design, and Optimization of Loop Heat Pipes

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