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Description
Stirling coolers are a highly promising technology in the field of low temperature production due to their exceptional efficiency and reliability. Stirling coolers, one which employs helium as the working fluid, offer an alternate choice for those looking for a cooling system that offers both ecological friendly and energy-efficient. Stirling cooler, appropriate for producing temperature ranges of 100 K to 200 K applications used in this design, prototyping and investigation. Free piston coolers avoid the difficulties usually occur in crank driven mechanism also provides better robustness and eliminate side forces. The application levels of this type of devices encompass a wide range of functions, including deep freezing, medical preservation, and vaccine chilling. These kinds of coolers have the capacity to generate a cooling effect that can range from a few watts to 100 W, depending on the levels of application and temperature range.
The system and preliminary conceptual design of a beta-type free piston Stirling cooler were carried out by using SAGE software. The important system components comprise the compression space, expansion space, regenerator and heat exchangers were interconnected through the application of distinct boundary conditions, including pressure, mass flow, and heat flow. The resonating mechanism of the cooler is achieved by a moving magnet type linear compressor and spring-mass system. In this work, the regenerator, hot and cold heat exchangers are modelled as porous media. The analysis of the cooler takes into account several crucial characteristics, including the porosity of the regenerator, the heat exchangers for both hot and cold temperatures, the clearance of the piston seal, the gap in the displacer appendix, and the losses in the gas spring, all of which have an impact on the cooler's performance. The designed cooler can produce varying cooling loads in the 100K to 200 K range nearly with linear temperature gradient curve. The second stage of the study focused on the design of a linear motor drive mechanism with the help of SAGE and Ansys Maxwell software by which the piston moves in axial direction to provide the Simple Harmonic Motion. The important parameters considered for the analysis the size and material of magnet, optimum magnetic gap and the core sizes. Final part of the study includes the energy loss calculation in given prototype with varying parameters for better performances.
| Submitters Country | INDIA |
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