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File Last modified on: Mon Jul 30, 2012 12:43:54
 

Counter flow heat exchanger for a Joule-Thomson cryocooler

 

Counter flow heat exchanger for a miniature Joule-Thompson cryocooler. The heat exchanger comprises a body formed of a bottom sheet, a second sheet, a third sheet, a fourth sheet and a top sheet. All the sheets are made of low temperature cofired ceramics and stacked one above another and fused together. The second sheet comprises a low pressure flow channel  along the length thereof terminating in an inflow hole at one end thereof and in an outlet hole  at the other end thereof. The third sheet comprises an inflow hole  at one end thereof corresponding to and matching with the inflow hole in the second sheet and an outlet hole  at the other end thereof corresponding to and matching with the outlet hole in the second sheet. The fourth sheet comprises a high pressure flow channel  along the length thereof, an inflow hole  at one end thereof corresponding to and matching with the inflow hole in the third sheet and spaced apart from corresponding one end of the high pressure flow channel, an inlet hole  terminating at the inception of the high pressure flow channel and an outlet hole  corresponding to and matching with the outlet hole in the third sheet and spaced apart from the inlet hole in the fourth sheet. The top sheet comprises an inlet hole  corresponding to and matching with the inlet hole in the fourth sheet and an outlet hole  corresponding to and matching with the outlet hole in the fourth sheet and a narrow flow path between the fourth sheet and top sheet communicating with said one end of the high pressure flow channel and the inflow hole in the fourth sheet

Indian patent application no. 2133/MUM/2012

Inventors: Atrey Milind Diwakar, Gandhi Prasanna subhash (IITB) Phatak Girish Jayant (C-Met)