Speaker
Prof.
Subhash Jacob
(Center for Cryogenic Technology, Indian Institute of Science)
Description
Sustained efforts have been made in our laboratory to improve the performance of an indigenously developed pressure wave generator by reducing the mechanical losses and current required to drive the piston. Currently, a matching pulse tube cooler targeted for 0.5 W @ 80 K was designed using Sage and the experience gained from previous studies. A no load temperature of 74 K was achieved. The mass flow rate at different points of the pulse tube cooler was experimentally measured using a hot wire anemometer. The experimental results including the pressure amplitude and mass flow rate at different locations of the pulse tube cooler are compared with Sage predictions, thus validating the design. In order to further improve the no load temperature and the efficiency, the effect of regenerator material configurations on the cooling power is studied. The total parasitic heat loads are measured using the rate the rise of temperature of cold heat exchanger. Also the effect of the regenerator wall thickness on the no load temperature is experimentally studied and the achieved performance level of the cooler has been reported.
Author
Kranthi Kumar Jonnalagadda
(Indian Institute of Science)
Co-authors
Mr
Damu C.
(Center for Cryogenic Technology, Indian Institute of Science)
Dr
Karunanithi Ranagaswamy
(Center for Cryogenic Technology, Indian Institute of Science)
Dr
Narasimham G. S. V. L
(Department of Mechanical Engineering, Indian Institute of Science)
Mr
Praveen T.
(Center for Cryogenic Technology, Indian Institute of Science)
Mr
Samir Mallick
(Center for Cryogenic Technology, Indian Institute of Science)
Prof.
Subhash Jacob
(Center for Cryogenic Technology, Indian Institute of Science)
