Regenerator optimization for stirling cycle refrigeration
- Los Alamos National Lab., NM (United States)
- New Mexico Tech, Socorro, NM (United States)
A cryogenic regenerator for a Stirling cycle is discussed by minimizing the entropy gain as the criterion of performance. Only the gas losses are treated here. The authors argue that the optimum design corresponds to uniform channel flow with minimum turbulence. The optimization depends upon minimizing the sum of three sources of entropy generation, those due to transverse and parallel heat conduction and that due to friction with the wall. This leads to criteria for the width, length, and velocity of the gas, which for helium become W= 1.6{times}10{sup {minus}4} T{sub O}/({sigma}P{sub O}) cm, L= 6.7{times}10{sup {minus}5} T{sub O}/({sigma}{sup 2}P{sub O}) cm, and v/C{sub s} = {sigma}/2 respectively where {sigma} is the ratio (entropy gain)/(entropy transferred), C{sub s} is sound speed, P{sub O} is the pressure in atmospheres, and T{sub O} is the ratio of temperature to room temperature. The thermal properties of the channel wall must then accommodate the heat flow of the gas without substantially increasing the loss fraction. That problem is reserved to another paper.
- OSTI ID:
- 47813
- Report Number(s):
- CONF-930703-; TRN: 95:011342
- Resource Relation:
- Conference: International cryogenic materials conference (ICMC), Albuquerque, NM (United States), 12-16 Jul 1993; Other Information: PBD: 1994; Related Information: Is Part Of Advances in cryogenic engineering, Volume 39, Part B; Kittel, P. [ed.]; PB: 1053 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Regenerator optimization for Stirling cycle refrigeration
Kinetics and temperature dependence of the BrO + ClO reaction