开发和研究增加传热距离的环形热管的运行特性

IF 0.9 Q4 ENERGY & FUELS Thermal Engineering Pub Date : 2024-03-14 DOI:10.1134/S004060152402006X
Yu. F. Maydanik, V. G. Pastukhov, M. A. Chernysheva
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引用次数: 0

摘要

摘要 热控、加热和冷却系统中的节能供热和排热任务与许多技术领域息息相关。本文介绍了对 21 米长环形热管(LHP)的开发和研究结果,这是一种在封闭蒸发-冷凝循环中运行的被动热传递装置,利用毛细管压力泵送工作流体。这种装置可用于热源和散热器之间相距数米甚至数十米的系统,而无需使用额外的能源。该设备有一个直径为 24 毫米的蒸发器,带有一个长 188 毫米的加热区、一条蒸汽管路和一条液体管路(外部/内部直径分别为 8/6 毫米和 6/4 毫米)。冷凝器是一个 310 毫米长的管中管式热交换器,配有冷却夹套。测试时,LHP 处于水平位置。冷凝器的热量通过水-乙二醇混合物的强制对流带走,温度分别为 20 和 -20°C,流速为 6 立方米/分钟。在第一种情况下,电加热器提供给蒸发器的热负荷从 200 W 增加到 1700 W,在第二种情况下增加到 1300 W。蒸发器出口处的蒸汽温度分别从 25°C 到 62°C 和从 24°C 到 30°C 不等。沿蒸气管道长度方向的最大温差不超过 4°C。这种装置可用于节能系统,以利用低电位热、加热或冷却远距离物体,以及在散热器的大面积表面上均匀分布热量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Development and Study of Operating Characteristics of a Loop Heat Pipe with Increased Heat Transfer Distance

The task of energy-efficient heat supply and removal in thermal control, heating and cooling systems is very relevant for many branches of technology. The paper presents the results of the development and study of a 21 m long loop heat pipe (LHP) that is a passive heat-transfer device operating on a closed evaporation-condensation cycle and using capillary pressure to pump a working fluid. These devices can be used in systems where the heat source and the heat sink are removed from each other by a distance measured in meters and even tens of meters, without the use of additional energy sources. The device has a 24 mm diameter evaporator with a 188 mm long heating zone, a vapor line and a liquid line (external/internal diameters of 8/6 mm and 6/4 mm). A 310 mm long pipe-in-pipe heat exchanger equipped with a cooling jacket was used as a condenser. The tests were conducted with the LHP in a horizontal position. Heat was removed from the condenser by forced convection of a water-ethylene glycol mixture with temperatures of 20 and –20°C and a flow rate of 6 dm3/min. The heat load supplied to the evaporator from the electric heater increased from 200 to 1700 W in the first case and to 1300 W in the second. The vapor temperature at the outlet of the evaporator varied from 25 to 62°C and from 24 to 30°C, respectively. Its maximum temperature difference along the length of the vapor line did not exceed 4°C. Such devices can be used in energy-efficient systems for utilizing low-potential heat, heating or cooling remote objects, and for uniformly distributing heat over a large surface area of heat sinks.

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来源期刊
CiteScore
1.30
自引率
20.00%
发文量
94
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