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Measurements have been made on the thermal stabilization provided by a gravitational thermal pipe containing a controlling piston.
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| | Recently, the investigative territory in Regional Geocryology have been further expanded to Antarctica, the arid northwest and the humid southeast parts of the Qinghai-Xizang Plateau. Some kinds of massive ice with different origins have been found. In physics of Frozen Soils, studies on water migration, frost heave, mechanim of ice formation, strength and creep have been developed in depth. In the last few years, the studies on amelioration and utilization of frozen soils are on the upgrade. There is a goo... | | 近年来,在南极和青藏高原发现了多种成因的厚层地下冰。冰土的水分迁移、冻胀、成冰机制、强度和蠕变等的研究进一步深化。冻土改造和利用兴起,在寒区砂金矿开采、热桩利用等方面有了良好的开端。 | | 文摘来源 | | Thermal pipe is one of the equipment which can lower down ground temperature by means of utilizing natural cold energy. The principle and experience of application of thermal pipe to the culvert engineering in permafrost region of the Qinghai-Xizang Plateau were introduced based on the practice in the experimental engineering on the plateau. | | 热桩是一种无需外加动力的人工冷冻装置。本文根据试验工程的应用状况,总结介绍热桩在多年冻土区涵洞工程中应用的原理和经验。 | | 文摘来源 | | The laws of convection heat transfer between thermalpile and air are studied by test. The results show that heat flux and heat transfer coefficient are changed with air temperature and speed. Because of the influence of special sharp of condensation heat exchange of thermalpile, the efficiency of convection heat transfer between thermalpile and air decreases when air temperature >-12 ℃ and wind speed >2 m/s. | | 通过低温室内试验研究热桩与空气间的对流换热规律结果表明,热桩的热流量和放热系数随气温、风速的变化而变化,但因冷凝器特定外形热阻及热桩内凝结换热的影响,气温大于-12℃和风速大于2m/s时,热桩与空气间的对流换热效率降低。 | | 文摘来源 | |   | | << 更多相关文摘 |
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