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A_(1/2) 专业委员会上共宣读论文二十八篇,涉及低温制冷技术,低温用仪器和材料,低温仪表与控制等课题。现将有关论文概述如下:一、低温用机器与材料超导电缆与现有的加压油冷电缆相比,有不少优点。因而,自六十年代以来,一直是比较活跃的研究领域之一。目前,奥地利,苏联和美国都在进行着大型的超导电缆研制工程。奥地利的F.Schaner 在会上提出了一篇题为《先进的超导输电工程》的论文。1979年奥地利建立了世界第一个长50米,60kV 的超导电缆。F.Schaner 新设计的超导电缆所不同的是采用了简化的无液氮导管的低温套。输送功率1GVA,输送电压110kV。采用Cu-Nb 波纹管,高压绝缘使用浸He 纸。工作温度为6.5K,导体表面场强为300A/cm。在上述条件下,其交流损失低于10μw/cm~2(相当于0.02w/m),在介质中的损失为0.15w/m。
A_ (1/2) A total of 28 papers were read by professional committees covering topics such as cryogenic refrigeration technology, instruments and materials for low temperature use, instrumentation and control at low temperatures. Now the paper is summarized as follows: First, the low-temperature machines and materials Superconducting cable with the existing pressurized oil-cooled cable, there are many advantages. Thus, it has been one of the more active research areas since the 1960s. At present, Austria, the Soviet Union and the United States are conducting large-scale superconducting cable research and development projects. F.Schaner from Austria presented a paper entitled “Advanced Superconducting Transmission Engineering” at the conference. 1979 Austria established the world’s first 50 meters long, 60kV superconducting cable. The difference between F.Schaner’s newly designed superconducting cables is the use of a simplified cryogenic jacket without liquid nitrogen tubing. Transmission power 1GVA, transmission voltage 110kV. Using Cu-Nb bellows, high voltage insulation used He He paper. Operating temperature is 6.5K, conductor surface field strength of 300A / cm. Under the above conditions, the exchange loss is less than 10μw / cm 2 (equivalent to 0.02w / m) and the loss in the medium is 0.15w / m.