CAJ | 학술논문

低温绝热管道的漏热量是衡量其性能的重要参数，准确有效测试低温绝热管道的漏热量至关重要。依照GB/T 18443.6-2010《真空绝热深冷设备性能试验方法第6部分：漏热量测量》的要求，通过借鉴和改进设计，搭建了基于流量计测量法和表面温度测量法进行低温绝热管道漏热量测量的试验平台。通过试验分析发现：流量计测量法是一种准确度比较高的漏热量测量方法，基于该法的漏热量测试系统对大管径的低温绝热管道能够提供较为理想的测试结果。但当低温绝热管道的管径较小时，测试系统就很难达到标准中所要求的测试条件了。利用表面温度测量法测量漏热率的准确度不高，原因在于测温元件的精度很难满足要求，另外，还在于数据处理方法还不完善。
저온절열관도적루열량시형량기성능적중요삼수，준학유효측시저온절열관도적루열량지관중요。의조GB/T 18443.6-2010《진공절열심랭설비성능시험방법제6부분：루열량측량》적요구，통과차감화개진설계，탑건료기우류량계측량법화표면온도측량법진행저온절열관도루열량측량적시험평태。통과시험분석발현：류량계측량법시일충준학도비교고적루열량측량방법，기우해법적루열량측시계통대대관경적저온절열관도능구제공교위이상적측시결과。단당저온절열관도적관경교소시，측시계통취흔난체도표준중소요구적측시조건료。이용표면온도측량법측량루열솔적준학도불고，원인재우측온원건적정도흔난만족요구，령외，환재우수거처리방법환불완선。
Heat-leak rate is a crucial property for vacuum insulation cryogenic tube, so searching an effective testing method to get it becomes urgent. Based on GB/T 18443.6 (testing method of performance for vacuum insulation cryogenic equipment-Part 6:heat-leak rate measurement), two systems for the testing of heat-leak rate were built up-one was according to the evaporation rate and the other was to the surface temperature. The experimental results have shown:With the method of evaporation rate, the testing equipment can execute an accurate measurement for the heat-leak rate of the tubes with large diameter, whereas for the small diameter tubes the testing equipment cannot give a satisfying result. Moreover, the method of surface temperature was verified not an accurate method to testing the heat-leak rate of cryogenic tubes, because of the inadequate precision of the thermocouples and the defective calculation of the heat-leak rate.