Computer simulation model for Lucas Stirling refrigerators

Yuan, Shandong; Spradley, I. E.; Yang, Peng; Nast, T. C.

doi:10.1016/0011-2275(92)90257-b

Cited by 17 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The initial temperature of the compression chamber and cooler is assumed to be equal to the cooler wall temperature, which is the cold end temperature. Regarding the regenerator, multiple nodes are adopted to better predict the temperature gradient in the regenerator, as suggested in references [21,22]. The initial streamwise temperature profile in the regenerator is assumed to be a linear profile between the hot and the cold end temperatures.…”

Section: Thermodynamic Modelmentioning

confidence: 99%

Numerical Optimization of a Four-Cylinder Double-Acting Stirling Engine Based on Non-Ideal Adiabatic Thermodynamic Model and SCGM Method

Cheng

Tan

2020

Energies

View full text Add to dashboard Cite

The aim of this study is to optimize a four-cylinder, double-acting α-type Stirling engine with wobble-yoke mechanism using an optimization scheme incorporated with an efficient thermodynamic model. In this study, the non-ideal adiabatic thermodynamic model is improved by taking into account factors including pressure drops due to the sudden expansion or contraction of flow cross-sectional areas in the engine, multiple nodes in the regenerator adopted to accurately capture the temperature gradient in the regenerator, and the dependence of the transport properties (thermal conductivity and dynamic viscosity) of the working fluid on temperature and pressure. A parametric analysis is firstly performed to identify the designed parameters that need to be optimized. In this study, engine optimization is carried out by using the simplified conjugate-gradient method (SCGM). The effects of the weighting coefficients of the objective function are studied. For a particular case considered, the optimization successfully elevates the power output from 1062.56 to 1659.72 W, and thermal efficiency from 27.41% to 37.22%. Furthermore, the robustness of the optimization method is tested by giving different sets of initial guesses. It is found that the present approach can stably lead to the same optimal design and is independent of the initial guess.

show abstract

Section: Thermodynamic Modelmentioning

confidence: 99%

Numerical Optimization of a Four-Cylinder Double-Acting Stirling Engine Based on Non-Ideal Adiabatic Thermodynamic Model and SCGM Method

Cheng

Tan

2020

Energies

View full text Add to dashboard Cite

show abstract

“…Since the isothermal model is an ideal model, the analysis of Urieli and Berchowitz [2] for a free-piston Stirling machine will be inaccurate. For the analysis of an ITSR, a nodal model based on numerical computation scheme has been developed [3]. Several commercial software packages are available.…”

Section: Introductionmentioning

confidence: 99%