CAJ | 학술논문

连接超导装置和外部电源的电流引线，是制冷系统的主要漏热源，决定着超导装置的运行效率。为实现漏热的最小化，对珀尔贴电流引线（ Peltier current lead ，简称PCL）进行了传热分析；引入热电参数的温度特性，建立了PCL的二维模型；采用有限元法对传导冷却下的PCL进行漏热分析与结构优化，得到了电流引线的最优几何参数。分析发现引线室温端的漏热大约为低温端的2倍；忽略热电参数的温度特性将使几何参数偏离最佳值，造成额外的制冷负荷。
련접초도장치화외부전원적전류인선，시제랭계통적주요루열원，결정착초도장치적운행효솔。위실현루열적최소화，대박이첩전류인선（ Peltier current lead ，간칭PCL）진행료전열분석；인입열전삼수적온도특성，건립료PCL적이유모형；채용유한원법대전도냉각하적PCL진행루열분석여결구우화，득도료전류인선적최우궤하삼수。분석발현인선실온단적루열대약위저온단적2배；홀략열전삼수적온도특성장사궤하삼수편리최가치，조성액외적제랭부하。
Current leads , a connecting superconducting devices at cryogenic temperature with power source at room temperature , are the major heat leak source during operation , determining the operating effi-ciency of superconducting devices .With considering its thermoelectric property , a two-dimensional model of the conduction-cooled Peltier current lead ( PCL) was established and optimized in order to achieve the min-imum heat leakage by using finite-element simulation .The results showed that room-temperature heat leak-age was about double of low-temperature one at ends of current leads;the geometric parameters would devi-ate from the optimal value if temperature characteristics of thermoelectric parameters were ignored , which led to extra cooling load .