21-25 July 2019
Connecticut Convention Center, Level 6
US/Eastern timezone

C2Or1B-01: Development of a Helium recondensing cryostat

23 Jul 2019, 11:00
15m
Level 6, Room 24-25 ()

Level 6, Room 24-25

Contributed Oral Presentation C2Or1B - Non-Aerospace Applications

Speaker

Prof. Shridhar Bapat (Mechanical Engineering Dept., Indian Institute of Technology Bombay)

Description

The present paper illustrates a case study in the progress of ongoing research work to develope a 100 litre Helium cryostat with in-situ recondensing facility.The cryostat with a cryocooler sock comprises of 46 components assembled in an optimal sequence. Cryostat development involved thermal load estimation, mechanical design, fabrication of components and sub-assemblies. The cryostat deploys a two stage Gifford McMahon cryocooler with appropriate cooling capacities available on I and II stage.The thermal load due to cryostat assembly is estimated as 34 W and 300 mW for I and II stage of cryocooler respectively. Experimental trials are conducted for testing of cryostat with recondensing cryocooler.The first no load trial in vacuum produced unsatisfactory results. Appropriate modifications are carried out in the assembly which resulted in no load temperatures of 51.95 K on I stage and 3.43 K on II stage. At heater load of 0.448 W, the II stage attained temperature of 4.21 K with I stage temperature stabilized at 52.47 K without any heater load on I stage. Temperature increased from 51.95 K to 52.47 K for I stage showing 0.448 W cooling capacity available at II stage for recondensation at 1 bar pressure. The paper highlights these modifications towards successful development of Helium recondensing cryostat.

Primary authors

Prof. Parag Muley (Mechanical Engineering Dept., Sardar Patel College of Engineering & Mechanical Engineering Dept, Indian Institute of Technology Bombay) Prof. Shridhar Bapat (Mechanical Engineering Dept., Indian Institute of Technology Bombay) Prof. Milind Atrey (Mechanical Engineering Dept., Indian Institute of Technology Bombay)

Presentation Materials