Thermodynamic optimization of the recuperative heat exchanger for Joule–Thomson cryocoolers using response surface methodology. (December 2015)

• Record Type: Journal Article
• Authors: Liu, Yingwen; Liu, Liu; Liang, Lili; Liu, Xin; Li, Jiapeng
• Is Part Of: International journal of refrigeration. Volume 60(2015:Dec.)
• Page Start: 155
• Page End: 165
• Publication Date: 2015-12
• Subjects: Joule–Thomson cryocooler -- Heat exchanger -- Available work loss -- RSM -- Thermodynamic optimization; Cryo refroidisseur de Joule-Thomson -- Echangeur de chaleur; Refrigeration and refrigerating machinery -- Periodicals; 621.56
• DOI: 10.1016/j.ijrefrig.2015.07.034
• Languages: English
• ISSNs: 0140-7007

Abstract

Highlights: Response Surface Methodology was developed to analyze the heat exchanger. The available work loss minimization was introduced as a new criterion. The interacting effects of geometric parameters were considered in the study. The optimum geometric parameters of the heat exchanger were acquired and verified. Abstract: In this paper, a numerical study is performed to investigate the effects of geometrical parameters on the thermodynamic performance of the helically coiled recuperative heat exchanger in a Joule–Thomson (J–T) cryocooler. A novel optimization model is developed based on the available work loss minimization for the recuperative heat exchanger. The experiments are conducted based on four factors: L, Dt, S, Ds, one level: Nd, and the results are analyzed according to the principle of Response Surface Methodology (RSM). The final predicted optimum combination of geometrical parameters for the heat exchanger is: L = 430.5 mm, Dt = 0.45 mm, S = 5.41, Ds = 4.3 mm. The optimization results are in good agreement with our model, and the deviations of predicted values are less than 1.32%. The model and results presented here for the optimization of the heat exchanger can provide helpful guidance and a new way for the optimization of J–T cryocooler.