Variable conductance loop thermosyphon (VCLT) manipulates natural phase-change cycle to regulate the heat transfer. Its primary advantages include high sustainability, simple design and low cost. One of the potential applications of variable conductance loop thermosyphon is thermal control in buildings for achieving high energy efficiency. In this study, a distributed steady-state model was implemented to determine the heat transfer control characteristics of variable conductance loop thermosyphon for the first time and evaluate its effectiveness on precise air-conditioning for buildings. The internal flow resistance rises from 0.002 K/W to 0.305 K/W and the heat transfer rate decreases from 468.5 W to 71.9 W when the relative opening degree of the regulating valve reduces from 1.00 to 0.17 under normal boundary conditions. The thermodynamic analyses show that the regulating valve of the variable conductance loop thermosyphon can enable effective thermal control over a wide range of heat transfer rate to accomplish indoor thermal comfort. The study also reveals that variable conductance loop thermosyphon can be effectively adopted with various working fluids and over wide ranges of heat source and heat sink temperatures.

可变电导环路热虹吸管（VCLT）操纵自然相变周期来调节热传递。其主要优点包括高可持续性，简单设计和低成本。可变电导环路热虹吸管的潜在应用之一是建筑物中的热控制，以实现高能效。在这项研究中，首次采用分布式稳态模型来确定可变电导环路热虹吸管的传热控制特性，并评估其在建筑物精确空调中的有效性。当调节阀的相对开度在正常边界条件下从1.00降低到0.17时，内部流阻从0.002 K / W增加到0.305 K / W，传热率从468.5 W降低到71.9W。热力学分析表明，可变电导率回路热虹吸阀的调节阀可在较宽的传热速率范围内进行有效的热控制，以实现室内的热舒适性。该研究还表明，可变电导环路热虹吸管可有效地用于各种工作流体，并在较宽的热源和散热器温度范围内使用。