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<b>Abstract</b>— <p>The paper presents and analyzes a thermal control system for a chemical reactor based on a highly efficient toric annular axial heat pipe (AHP) with sodium coolant and two wick structures. The device is designed to stabilize the temperature field in the zone of the endothermic reaction of methyl alcohol dehydration with a volumetric energy release of up to 450 W. As part of the study, a physical and mathematical model is developed that describes the steady-state and limit operating modes of the AHP. The model takes into account the relationship between the thermal–hydraulic processes in the evaporator, adiabatic zone, and condenser. The key aspect of the work is the comprehensive calculation of the main operating limits of the heat pipe: sonic (vapor supply limit), capillary (wick pumping limit), and wick boiling limit. Determining these limits allows us to quantify the maximum heat-transfer capacity of the proposed AHP design and establish the boundaries of safe thermal energy supply to the reactor, which directly correlates with the performance and stability of the chemical process. Heat is removed from the condenser in the system using an external cooling unit. The results of the work confirm the high potential for the use of axial heat pipes with liquid metal coolants as key elements of thermal stabilization systems for high-energy equipment, providing intensive and controlled heat exchange.</p>

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Application of Axial Heat Pipes in Increasing the Isothermicity of Endothermic Chemical Reactors

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • N. O. Borshchev,
  • A. V. Kochegarova,
  • O. A. Buryakovskaya

摘要

Abstract—

The paper presents and analyzes a thermal control system for a chemical reactor based on a highly efficient toric annular axial heat pipe (AHP) with sodium coolant and two wick structures. The device is designed to stabilize the temperature field in the zone of the endothermic reaction of methyl alcohol dehydration with a volumetric energy release of up to 450 W. As part of the study, a physical and mathematical model is developed that describes the steady-state and limit operating modes of the AHP. The model takes into account the relationship between the thermal–hydraulic processes in the evaporator, adiabatic zone, and condenser. The key aspect of the work is the comprehensive calculation of the main operating limits of the heat pipe: sonic (vapor supply limit), capillary (wick pumping limit), and wick boiling limit. Determining these limits allows us to quantify the maximum heat-transfer capacity of the proposed AHP design and establish the boundaries of safe thermal energy supply to the reactor, which directly correlates with the performance and stability of the chemical process. Heat is removed from the condenser in the system using an external cooling unit. The results of the work confirm the high potential for the use of axial heat pipes with liquid metal coolants as key elements of thermal stabilization systems for high-energy equipment, providing intensive and controlled heat exchange.