Investigation of solid nitrogen for cryogenic thermal storage in superconducting cable terminations for enhanced resiliency

[摘要] Low heat capacity of helium makes the helium gas cooled high temperature superconducting (HTS) power devices susceptible to large temperature rises during unexpected heat loads such as electrical faults or cryogenic system failures. Cryogenic thermal storage in the form of solid nitrogen designed in the terminations is explored as a means to increase the thermal stability and operational time of HTS power cables in the event of unexpected heat loads. An external tank containing activated charcoal is used as an adsorption buffer tank for nitrogen gas. The use of activated charcoal minimizes the volume of the buffer tank and prevents pressure rises during melting and boiling of the solid nitrogen. Calculations of the cryogenic thermal storage needed and a description of the experimental setup used to understand the design constraints are discussed.

[发布机构] FAMU-FSU College of Engineering, Tallahassee; FL; 32310, United States^1;Center for Advanced Power Systems, Florida State University, 2000 Levy Ave, Tallahassee; FL; 32310, United States^2;Energy, Materials and Systems, University of Twente, Drienerlolaan 5, Enschede; 7522 NB, Netherlands^3

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Cryogenic system;Design constraints;Electrical faults;High temperature superconducting;HTS power cable;Solid nitrogen;Temperature rise;Thermal storage