Heat exchange – Flow passages for two confined fluids
Patent
1989-07-05
1992-04-07
Davis, Jr., Albert W.
Heat exchange
Flow passages for two confined fluids
165154, 62 512, 29890034, F28F 300
Patent
active
051018942
ABSTRACT:
Perforated plate heat exchangers and cryocoolers based on plates with extremely small, tubular holes are disclosed. The plates may have hole diameters down to the low micron size range and length-to-diameter ratios above unity and from 2 to 6 for typical applications. Such perforated plates function as tubes rather than screens and provide high efficiency, especially for compact cryocooler applications. The plates, which are made of a high thermal conductivity metal, and alternating spacers of low thermal conductivity material are disposed in an elongated stacked array of a large number of units such as 100. For use in a recuperative heat exchanger for a cryocooler employing the Linde-Hampson cycle, webs at the plate and spacer edges and a strip across the middle define two flow chambers, one for gas flow in each direction. One end of the array communicates with a high-pressure gas inlet for introducing gas in one chamber and a low-pressure gas outlet for removing gas from the other chamber. The other end of the array is coupled with a Joule-Thomson expander plate and a liquid collector. Such a cryocooler operates at cryogenic temperatures and provides high efficiency in a compact size. Input gas pressure requirements are low enough to be provided by a mechanical compressor. A process for fabricating perforated plates with the stated properties is also disclosed.
REFERENCES:
patent: 3228460 (1966-01-01), Garwin
patent: 3273356 (1966-09-01), Hoffman
patent: 3692099 (1972-09-01), Nesbitt et al.
Alabama Cryogenic Engineering, Inc.
Davis Jr. Albert W.
LandOfFree
Perforated plate heat exchanger and method of fabrication does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Perforated plate heat exchanger and method of fabrication, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Perforated plate heat exchanger and method of fabrication will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1889131