A numerical cool-down analysis for Dewar-detector assemblies cooled with Joule-Thomson cryocoolers

Nir Tzabar, Amiram Kaplansky

פרסום מחקרי: פרסום בכתב עתמאמרביקורת עמיתים

12 ציטוטים ‏(Scopus)

תקציר

Joule-Thomson (J-T) cryocoolers are commonly in use for rapid cool-down of Infra-Red (IR) detectors. The cool-down time is governed both by the J-T cryocooler performances and the Dewar structure, which is usually geometrically complicated. A finite-element model of the complete Dewar-Detector-Cooler Assembly (DDCA) is developed. The analysis calculates the heat transfer in the Dewar and the J-T cryocooler, the coolant flow rate, the pressure drop in the vessel that supplies the coolant to the J-T cryocooler, and the pressure drop in the low pressure stream of the heat exchanger that determines the pressure in the evaporator. A verification of the analysis is conducted against experimental results with a single cryocooler at a single scenario and the model is further validated against eleven other experimental results. A satisfactory agreement is obtained between the analysis and the experimental results.

שפה מקוריתאנגלית
עמודים (מ-עד)56-65
מספר עמודים10
כתב עתInternational Journal of Refrigeration
כרך44
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - אוג׳ 2014
פורסם באופן חיצוניכן

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