Abstract To address the higher cooling requirement for embankments in permafrost regions, a novel active refrigerating method, which focuses on releasing permafrost heat in warm seasons, is presented. Based on the real situations in field, comparisons were made between thermally driven and electrically driven refrigeration methods in the roadway application. A prototype of the vapor compression refrigeration system (VCRS) was then designed and manufactured, and its practical performance experimentally investigated. The data shows that: (1) the refrigerating temperature can reach below 0 °C in warm seasons; (2) the heat reflux capacity and effective coefficient of performance is about 55.4 W and 0.41, respectively; (3) the predicted long term cooling scope is more than 6 m. The VCRS prototype can present good refrigerating performance in warm seasons. We conclude that the new structure is a potential method for preventing permafrost degradation and can ensure the long-term thermal stability of embankments under the effects of climate warming.

中文翻译：

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开发用于永久冻土冷却的新型蒸汽压缩制冷系统 (VCRS)

摘要 为解决多年冻土地区对路堤更高的冷却要求，提出了一种新的主​​动制冷方法，该方法侧重于在温暖季节释放多年冻土热量。根据现场实际情况，对热驱动和电驱动制冷方法在巷道应用中进行了比较。然后设计和制造了蒸汽压缩制冷系统（VCRS）的原型，并对其实际性能进行了实验研究。数据表明：（1）暖季冷藏温度可达0℃以下；(2)热回流能力和有效性能系数分别约为55.4 W和0.41；(3) 预测的长期降温范围大于 6 m。VCRS 样机在温暖的季节可以表现出良好的制冷性能。我们得出结论，新结构是防止永久冻土退化的潜在方法，可以确保在气候变暖的影响下路堤的长期热稳定性。